Structural Design and Ergonomics Analysis of K-Type Horizontal Inquiry Machine-Inclined Angle and Anti-Misoperation Principle

Introduction: It is also a "horizontal inquiry machine". Why is the experience so poor?

If you compare the prototypes of horizontal inquiry machines from several suppliers, there is a high probability that you will have a common feeling: they all look the same in appearance, but in actual operation, some have comfortable angles and few false touches, and some want to bend over to approach the screen within a few minutes. This difference is almost always a problem at the structural design level-details such as slope angle, installation height, and anti-misoperation logic are usually not reflected in the supplier's quotation, but it is precisely the core variable that determines whether the equipment is good or not.

AtPrevious ArticleWe have described the overall positioning and hardware parameters of the K-machine. This article takes apart the structural design itself and makes it clear: how to determine the angle of the inclined plane, how to calculate the installation height, what is the principle of preventing accidental contact, and how to deal with the structural strength and heat dissipation routing. As a long-term manufacturer engaged in the structural design and manufacture of K-type horizontal inquiry machines, QUNMAO hopes that these details will help the purchaser to know which points to pay attention to when inspecting the factory or looking at the prototype, instead of just looking at the appearance and judging.

Inclined Angle Design Logic: Why Control Around 45 °

The core structural feature of the K-type horizontal inquiry machine is the inclined operating table. This angle is not determined by the appearance designer, but to meet two mutually restricted conditions at the same time:

Viewing the comfort zone

If the angle is too small (close to horizontal), the user needs to look down and look down, which is easy to cause neck fatigue after long-term use. If the angle is too large (close to vertical), the problem of screen reflection will be more obvious, especially in such scenes as government affairs halls and bank outlets with strong lights.

Operating comfort zone

After the arm droops naturally, whether the fingers can easily reach each area of the screen directly determines whether the operation is laborious. Too small an angle will make people bend forward unconsciously, and too large an angle will make the arm hang for a long time.

Combining these two conditions, QUNMAO controls the angle of the inclined plane in the range of about 45 degrees in the structural design of the K-type horizontal inquiry machine-this angle enables most adult users to be in a relatively comfortable state under natural standing posture, and can complete the inquiry operation without deliberately adjusting the posture. Specific to the landing plan of different projects, we will also make fine adjustments in combination with the screen size and the main users. # Detailed in this article。

Installation Height and Screen Center Line: How to Set Ergonomic Data

In addition to the angle of the table top, another detail that is easily overlooked is the installation height of the whole machine-specifically, the height of the screen centerline from the ground. If this data is copied from a "common standard", it is easy to have two kinds of problems: users with high height need to bend over to operate, and users with low height need to pad their feet.

When designing the structure of Type K, QUNMAO will refer to the height distribution interval of the adult population, set the height of the screen centerline within the interval that can cover the natural standing sight range of most adult users, and perform comfort tests for people with high or low extreme heights to observe whether there are obvious bending, footrest or sight blocking problems during operation. The significance of this set of ergonomic data is that the installation height is not an isolated size parameter, but should be designed together with the inclined plane angle and screen size. Any optimization of any link alone may destroy the overall operation experience.

Anti-touch Principle: Double Filtering of Structure and Touch Algorithm

Anti-touch is the most intuitive experience advantage of K machine compared with plane inquiry machine, but many people do not know how to realize this advantage. In fact, it is the result of superposition of two mechanisms:

Natural filtration at the structural level

The inclined surface itself changes the contact angle and contact area of the palm and clothes inadvertently against the body-on the plane inquiry machine, the user's palm or clothes corner is easily attached to the edge of the screen in an unconscious state, while the inclined surface structure is more likely to slide off or deviate from the effective touch area due to the existence of the inclined angle, thus reducing the probability of accidental contact from the structure.

Additional optimization at the touch algorithm level

On the basis of the structure, QUNMAO will also optimize the touch sensitivity algorithm for the edge area of the screen, identify and filter out the signals generated by large-area, abnormal touch tracks (such as palm sticking), and only respond to touch inputs that meet the normal click characteristics.

The superposition of these two mechanisms is the core reason why the K-type horizontal inquiry machine can maintain a low false touch rate in high-frequency contact scenarios such as hospitals and government halls. It should be noted that the specific false touch improvement range will vary depending on the use environment, flow density and touch scheme (capacitive screen/infrared screen). We suggest that the purchaser actually experience the test machine during the factory inspection or proofing stage, instead of judging by the parameter table alone.

Structural strength and stability: how to do the anti-dumping test

The K-type machine is usually installed in public places with dense flow of people, and bumps, leaning and even pushing may occur, so the structural strength and anti-dumping ability are the acceptance items that cannot be bypassed.

In the structural design stage of the K-type horizontal inquiry machine, QUNMAO will make special checks on the center of gravity distribution, base counterweight and frame welding strength of the whole machine, and test whether the whole machine will tilt or displacement beyond the safe range under different angles of force by simulating external force. The purpose of this type of test is not to pursue "absolutely not to fall", but to ensure that the equipment has sufficient structural stability under normal use and minor bumps, and will not cause safety hazards to users. This is why the base of the K type machine is often thicker than it looks-the weight distribution itself is part of the stability design.

Heat dissipation and routing design

The horizontal structure puts forward the same requirements for heat dissipation and wiring as vertical equipment:

Thermal design

Since the main board and power supply module are usually installed in a relatively closed space inside the fuselage, the structural design of the K-type machine needs to reserve a reasonable air inlet and outlet channel to avoid the frequency reduction or crash of the main board due to internal heat accumulation after long-term operation of the equipment, which is especially important for hospitals and government affairs halls running 7x 24 hours.

Route design

The connecting lines between the screen, motherboard, card reader, printer and other modules all pass through the wiring channel reserved inside the fuselage, and there will be no exposed cables-this is not only a consideration of the cleanliness of the appearance, but also a structural design to prevent the cables from being artificially pulled and damaged and affecting the normal operation of the equipment.

Shell material and surface technology: anti-fingerprint and anti-scratch balance

The operating table of the K type machine usually uses tempered glass to cover the screen area, and the shell frame adopts a sheet metal structure. On the surface process, QUNMAO will balance the two demands of fingerprint prevention (reducing the visual degradation caused by oil stain and fingerprint residue) and scratch prevention (dealing with high-frequency touch and daily cleaning friction). The specific process selection will also be adjusted according to the brand requirements of customers on appearance texture (matte/bright surface).

Maintenance convenience design: rear open maintenance door

Once the equipment is deployed in batches to multiple outlets, the convenience of after-sales maintenance will directly affect the operation and maintenance costs. In the structural design of the K-type machine, an independent maintenance door is usually reserved at the back of the fuselage. The operation and maintenance personnel can open the maintenance door to overhaul or replace the main board, power supply and wiring without disassembling the shell of the whole machine, thus greatly shortening the on-site maintenance time. This detail is easy to be ignored in the equipment procurement stage, but for the subsequent multi-network unified operation and maintenance project, it is a structural requirement that needs to be confirmed with the manufacturer in advance.

Compared with the competitive structure: where is the differentiation of the K machine?

The structural schemes of horizontal inquiry machines on the market are not completely consistent, and the common differences are concentrated in several aspects: whether the angle of the inclined plane is systematically calculated by ergonomics, or whether a fixed angle template is simply used; Is the prevention of false touch only based on a single dimension of touch control algorithm, or is it based on natural filtering with structural layer such as type K? Whether the routing and heat dissipation design has reserved internal channels or depends on external wiring and additional heat dissipation holes; and whether there are structural details such as rear-opening maintenance doors designed specifically for after-sales convenience. These differences are often not written in the regular specification sheet and require the purchaser to take the initiative to inquire and confirm the actual measurement when inspecting the factory or looking at the prototype.

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