Key elastic force detection device

Abstract

The utility model relates to the field of key switch elastic force detection, in particular to a key elastic force detection device, which comprises a transmission assembly comprising a carrying table, two conveyor belt assemblies symmetrically arranged on two sides of the carrying table and a positioning assembly arranged between the two conveyor belt assemblies; the detection assembly is arranged on the machine table and above the transmission assembly and comprises a Y-axis module, an X-axis module connected with the Y-axis module and a Z-axis module connected with the X-axis module, and the Z-axis module is connected with a detection device; the calibration assembly comprises a calibration sensor and a plurality of weights, and the calibration sensor is sequentially connected with the weights and the probe assembly in an abutting mode so as to synchronize calibration data to the probe assembly. Through the arrangement of the transmission assembly, automatic feeding, positioning detection and discharging of a to-be-detected product are realized, and the detection efficiency is greatly improved; through the arrangement of the calibration assembly, the pressure sensor of the probe assembly is calibrated, so that the pressure sensor is kept in a high-precision working state, and the detection accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of key switch elastic force detection, in particular to a key switch elastic force detection device. Background Art

[0002] For devices with push switches, such as mobile phones, keyboards, etc., the pressure of the push switches needs to be tested before leaving the factory to confirm whether the pressure of the push switches is normal. Generally, a detection mechanism is used to press the push switch, and the pressure sensor captures the pressure value during the pressing process to obtain the pressure value of the push switch. In the prior art, when performing push switch detection, the product to be detected is usually placed directly under the detection equipment manually, and then taken out after the detection is completed, which has low detection efficiency; in addition, the pressure sensor is prone to zero point drift, temperature drift, etc. after long-term use or when the ambient temperature changes, which leads to the occurrence of problems such as increased measurement errors. If the pressure sensor is frequently replaced or removed for calibration, the detection efficiency is affected and the cost is high. Therefore, how to improve the detection efficiency of the push switch and avoid the instability of the pressure sensor is a problem that technicians in this field need to consider. Utility Model Content

[0003] The utility model aims to provide a key spring force detection device to solve the problems of low key switch detection efficiency and unstable pressure sensor in the prior art.

[0004] The technical solution of the utility model is: a key elasticity detection device, comprising:

[0005] The transmission component is arranged on the machine platform, including a carrier, two conveyor belt components symmetrically arranged on both sides of the carrier, and a positioning component arranged between the two conveyor belt components. The product to be inspected is transported to the carrier by the conveyor belt component and positioned by the positioning component.

[0006] The detection component is arranged on the machine platform and above the transmission component, and includes a Y-axis module, an X-axis module connected to the Y-axis module, and a Z-axis module connected to the X-axis module. The Z-axis module is connected to a detection device. The detection component drives the detection device to the product to be detected, and the probe component on the detection device detects the product.

[0007] The calibration component includes a calibration sensor and a plurality of weights. The calibration sensor is in contact with the weights and the probe component in turn, thereby synchronizing the calibration data to the probe component.

[0008] Preferably, the conveyor belt assembly includes a conveyor belt, a first bracket connected to the conveyor belt through a first guide rail in the Z-axis direction, a first driving device is arranged on the first bracket, the first driving device is connected to the conveyor belt, and the first driving device can drive the conveyor belt to move along the guide direction of the first guide rail;

[0009] The first bracket is connected to the machine platform via a second guide rail, a second driving device is arranged on the machine platform, the second driving device is connected to the first bracket, and the second driving device can drive the first bracket to move along the second guide rail, so that the two conveyor belts move towards or away from each other.

[0010] Preferably, the positioning assembly includes a positioning drive device and a positioning block connected to the positioning drive device, and the positioning drive device can drive the positioning block to move along the Z axis so that the positioning block is located on the travel path of the conveyor belt driving the product to be inspected.

[0011] Preferably, at least two groups of positioning components are provided, and are respectively arranged on both sides of the carrier in the conveying direction of the conveyor belt;

[0012] At least two groups of the positioning drive devices are provided, and the distance between the two groups of the positioning drive devices and the positions in the conveying direction of the conveyor belt are adjustable.

[0013] Preferably, the probe assembly includes a pressure sensor connected to the detection device, an elastic conduction device connected to the pressure sensor, and a probe connected to the elastic conduction device.

[0014] Preferably, the elastic conducting device is barrel-shaped and has a spring disposed therein; the upper end of the probe extends into the elastic conducting device and is connected to the spring;

[0015] A vertical guide groove is arranged on the elastic conduction device, and a guide pin is connected to the probe, and the guide pin is connected to the guide groove. During detection, the probe moves along the guide groove to compress the spring, and a pressure value is obtained through the pressure sensor.

[0016] Preferably, the calibration assembly comprises a first module which is arranged on the machine platform and has a horizontal driving direction, a second module which is connected to the first module and has a vertical driving direction, and the calibration sensor is connected to the second module;

[0017] The calibration component also includes a second bracket arranged on the machine platform, a support plate is arranged on the second bracket, a limiting groove is arranged on the support plate, a through hole is arranged at the center of the limiting groove, the weight is arranged in the limiting groove, and the calibration sensor can pass through the through hole and support the weight to realize the calibration of the calibration sensor.

[0018] Preferably, a clamping jaw device is provided on the support plate, and V-shaped grooves are provided on opposite sides of two clamping jaws of the clamping jaw device. When the two clamping jaws approach each other, the V-shaped grooves contact the weights to achieve the positioning of the weights, so that the weights are located in the center of the limiting grooves.

[0019] Preferably, a visual positioning device is connected to the Z-axis module.

[0020] Compared with the prior art, the advantages of the utility model are:

[0021] (1) Through the setting of the transmission component, the automatic loading, positioning detection and unloading of the product to be detected can be realized, which greatly improves the efficiency of detection; through the setting of the calibration component, the pressure sensor of the probe component can be automatically calibrated by setting the working time or working quantity, so that it maintains a high-precision working state and improves the accuracy of detection. At the same time, automated detection also improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0023] Figure 1 This is a structural schematic diagram of the key elastic force detection device of the utility model;

[0024] Figure 2 It is a structural schematic diagram of the transmission component of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the positioning assembly of the utility model;

[0026] Figure 4 It is a structural schematic diagram of the detection device of the utility model;

[0027] Figure 5 for Figure 4 The enlarged structural diagram at A in the middle;

[0028] Figure 6 It is a structural schematic diagram of the calibration sensor and its connecting mechanism of the utility model;

[0029] Figure 7 It is a structural schematic diagram of the weight and its connecting mechanism described in the utility model.

[0030] Among them: Machine 1;

[0031] Transmission assembly 2, carrier 21, conveyor belt assembly 22, conveyor belt 221, first guide rail 222, first bracket 223, first driving device 224, second guide rail 225, second driving device 226, positioning assembly 23, positioning driving device 231, positioning block 232, roller 233;

[0032] Detection assembly 3, detection device 31, Y-axis module 32, X-axis module 33, Z-axis module 34, probe assembly 35, pressure sensor 351, elastic conduction device 352, guide groove 3521, probe 353, guide pin 3531, spring 354, visual positioning device 36;

[0033] Calibration assembly 4 , calibration sensor 41 , weight 42 , first module 43 , second module 44 , second bracket 45 , support plate 46 , limiting groove 461 , through hole 462 , clamping jaw device 47 , V-shaped groove 471 . DETAILED DESCRIPTION

[0034] The following is a further detailed description of the present invention in conjunction with specific embodiments:

[0035] like Figure 1 The key spring force detection device shown is used for the spring force detection of key switches. The product to be detected is placed on a jig (not shown in the figure) and is transferred to the conveyor belt of the transmission component by the previous process equipment or manually; it stops when it is directly above the carrier and is detected by the detection component 3; after the detection is completed, it is transferred to the next process by the conveyor belt or is taken out manually when it is transferred to the downstream end of the conveyor belt. After working for a certain period of time or detecting a certain number of products, the pressure sensor on the detection component 3 is calibrated by the calibration component to avoid detection errors. Specifically:

[0036] like Figure 2-Figure 3 As shown, the transmission component 2 is arranged on the machine 1, including a carrier 21, two conveyor belt components 22 symmetrically arranged on both sides of the carrier 21, and a positioning component 23 arranged between the two conveyor belt components 22. The product to be inspected is conveyed to the carrier 21 by the conveyor belt component 22 and positioned by the positioning component 23.

[0037] The conveyor belt assembly 22 includes a conveyor belt 221. The conveyor belts 221 on the two conveyor belt assemblies 22 move synchronously, and the two ends of the jig carrying the product are respectively mounted on the two conveyor belts 221. The conveyor belt 221 is connected to the first bracket 223 through the first guide rail 222 in the Z-axis direction. The first bracket 223 is provided with a first driving device 224, and the first driving device 224 is connected to the conveyor belt 221. A plurality of first guide rails 222 can be provided to ensure the stability of the conveyor belt 221 in the Z-axis direction; the first driving device 224 can drive the conveyor belt 221 to move along the guide direction of the first guide rail 222. The first driving device 224 can be a servo motor and a screw rod connected thereto. The screw rod is connected to the transmission belt, and the vertical movement of the conveyor belt 221 is realized by the rotation of the screw rod; of course, the first driving device 224 can also be other forms of drive such as a cylinder.

[0038] The first bracket 223 is connected to the machine 1 through the second guide rail 225. The machine 1 is provided with a second driving device 226, which is connected to the first bracket 223 and can drive the first bracket 223 to move along the second guide rail 225, so that the two conveyor belts 221 move toward or away from each other. The second guide rail 225 is provided with multiple to ensure the stability of the first bracket 223. The second driving device 226 can be a servo motor and a screw driven by the screw, which is connected to the first bracket 223 and drives the first bracket 223 to move on the second guide rail 225 through the rotation of the screw; in other embodiments, the second driving device 226 can be a cylinder, etc. When the transmission component 2 is working, the second driving devices 226 on the two conveyor belt components 22 move synchronously, and the driving movement directions are opposite.

[0039] There are at least two groups of positioning components 23, which are respectively arranged on both sides of the carrier 21 in the transmission direction of the conveyor belt 221. Among them, one group of positioning components 23 arranged at the downstream end of the conveyor belt in the transmission direction works when the fixture is transmitted to the top of the carrier 21 to block and position the fixture; and the positioning components 23 arranged at the upstream end of the conveyor belt 221 in the transmission direction, when the inspection work is in progress, block the fixture of the previous process from continuing to be transmitted to the carrier 21, affecting the normal inspection process.

[0040] The positioning assembly 23 includes a positioning drive device 231 and a positioning block 232 connected to the positioning drive device 231. The positioning drive device 231 can drive the positioning block 232 to move along the Z axis so that the positioning block 232 is on the travel path of the conveyor belt 221 that transmits the product to be inspected. A roller 233 can be set on the positioning block 232. When the fixture is placed on the carrier 21, sliding friction with the fixture can be avoided, and the stability of the fixture placement can be ensured to a certain extent. Each group of positioning assemblies 23 is provided with at least two groups of positioning drive devices 231, and correspondingly at least two positioning blocks 232 are also provided; the spacing between the two groups of positioning drive devices 231 and the position in the transmission direction of the conveyor belt 221 are adjustable to accommodate fixtures of different sizes.

[0041] When the transmission component 2 is working, the conveyor belt 221 conveys the jig carrying the product to be inspected to the carrier 21; the positioning drive device 231 drives the positioning block 232 to move upward, so that the jig stops, and the jig is now directly above the carrier 21; the first drive device 224 drives the conveyor belt 221 to move downward, places the jig on the carrier 21, and is inspected by the detection device 31; after the inspection is completed, the first drive device 224 drives the conveyor belt 221 to move upward, lifts the jig and detaches it from the carrier 21, and at the same time, the positioning drive component drives the positioning block 232 to reset downward, so that the jig continues to flow to the next process under the drive of the transmission belt.

[0042] like Figure 1, Figure 4-Figure 5 As shown, the detection component 3 is arranged on the machine 1 and above the transmission component 2, including a Y-axis module 32, an X-axis module 33 connected to the Y-axis module 32, and a Z-axis module 34 connected to the X-axis module 33. The Z-axis module 34 is connected to a detection device 31. The detection component 3 drives the detection device 31 to the product to be detected, and the probe component 35 on the detection device 31 detects the product. The Z-axis module 34 is connected to a visual positioning device 36. The fixture carrying the product to be detected is placed on the carrier 21. When detection is required, the X-axis module 33 and the Y-axis module 32 cooperate to move, firstly position the product to be detected by the visual positioning device 36, and then move the probe component 35 to the top of the product to be detected; finally, the Z-axis module 34 drives the probe component 35 to press down the key switch of the product to be detected to complete the detection.

[0043] There can be multiple probe assemblies 35, and they can be arranged in different forms according to actual needs. The probe assembly 35 includes a pressure sensor 351 connected to the detection device 31, an elastic conduction device 352 connected to the pressure sensor 351, and a probe 353 connected to the elastic conduction device 352. The elastic conduction device 352 is barrel-shaped, and a spring 354 is arranged inside; the upper end of the probe 353 extends into the elastic conduction device 352 and is connected to the spring 354. A vertical guide groove 3521 is arranged on the elastic conduction device 352, and a guide pin 3531 is connected to the probe 353, and the guide pin 3531 is connected to the guide groove 3521. During detection, the probe 353 moves along the guide groove 3521 to compress the spring 354, and obtains the pressure value through the pressure sensor 351.

[0044] like Figure 1 , Figure 6-Figure 7As shown, the calibration assembly 4 includes a calibration sensor 41 and a plurality of weights 42 of different masses. The calibration sensor 41 is connected to the weight 42 and the probe assembly 35 in sequence, and then the calibration data is synchronized to the probe assembly 35. Specifically: the calibration assembly 4 includes a first module 43 arranged on the machine 1 and having a horizontal driving direction, a second module 44 connected to the first module 43 and having a vertical driving direction, and the calibration sensor 41 is connected to the second module 44; the calibration assembly 4 also includes a second bracket 45 arranged on the machine 1, a support plate 46 is arranged on the second bracket 45, a limiting groove 461 is arranged on the support plate 46, a through hole 462 is arranged at the center of the limiting groove 461, and the weight 42 is arranged in the limiting groove 461. The calibration sensor 41 is driven by the first module 43 and the second module 44 to move in sequence to the bottom of the multiple weights 42, and passes through the through hole 462 upward to support the weights 42, thereby calibrating the calibration sensor 41; thereafter, driven by the first module 43 and the second module 44, the calibration sensor 41 moves to a place where there is no obstruction above it. At the same time, driven by the X-axis module 33, the Y-axis module 32 and the Z-axis module 34, the multiple probe assemblies 35 are pressed and connected to the calibration sensor 41 in sequence, and the pressure value of the calibration sensor 41 is synchronized and covered to the pressure sensor 351 of the probe assembly 35, thereby completing the calibration of the pressure sensor 351.

[0045] In this embodiment, in order to ensure the accuracy of the position of the weight 42 and avoid the situation where the weight 42 is tilted when the calibration sensor 41 supports the weight 42, thereby affecting the accuracy of calibration, a clamping device 47 is provided on the support plate 46, and V-shaped grooves 471 are provided on opposite sides of the two clamping jaws of the clamping device 47. When the two clamping jaws approach each other, the V-shaped groove 471 contacts the weight 42 to achieve the positioning of the weight 42, so that the weight 42 is located in the center of the limiting groove 461.

[0046] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.

Claims

1. A key spring force detection device, characterized in that: include: The transmission component is arranged on the machine platform, including a carrier, two conveyor belt components symmetrically arranged on both sides of the carrier, and a positioning component arranged between the two conveyor belt components. The product to be inspected is transported to the carrier by the conveyor belt component and positioned by the positioning component. The detection component is arranged on the machine platform and above the transmission component, and includes a Y-axis module, an X-axis module connected to the Y-axis module, and a Z-axis module connected to the X-axis module. The Z-axis module is connected to a detection device. The detection component drives the detection device to the product to be detected, and the probe component on the detection device detects the product. The calibration component includes a calibration sensor and a plurality of weights. The calibration sensor is in contact with the weights and the probe component in turn, thereby synchronizing the calibration data to the probe component.

2. A key spring force detection device according to claim 1, characterized in that: The conveyor belt assembly includes a conveyor belt, a first bracket connected to the conveyor belt through a first guide rail in the Z-axis direction, a first driving device is arranged on the first bracket, the first driving device is connected to the conveyor belt, and the first driving device can drive the conveyor belt to move along the guide direction of the first guide rail; The first bracket is connected to the machine platform via a second guide rail, a second driving device is arranged on the machine platform, the second driving device is connected to the first bracket, and the second driving device can drive the first bracket to move along the second guide rail, so that the two conveyor belts move towards or away from each other.

3. A key spring force detection device according to claim 2, characterized in that: The positioning assembly includes a positioning drive device and a positioning block connected to the positioning drive device. The positioning drive device can drive the positioning block to move along the Z axis so that the positioning block is located on the travel path of the conveyor belt driving the product to be inspected.

4. A key spring force detection device according to claim 3, characterized in that: The positioning components are provided in at least two groups, and are respectively arranged on both sides of the carrier in the conveying direction of the conveyor belt; At least two groups of the positioning drive devices are provided, and the distance between the two groups of the positioning drive devices and the positions in the conveying direction of the conveyor belt are adjustable.

5. A key spring force detection device according to claim 1, characterized in that: The probe assembly comprises a pressure sensor connected to the detection device, an elastic conduction device connected to the pressure sensor, and a probe connected to the elastic conduction device.

6. A key spring force detection device according to claim 5, characterized in that: The elastic conducting device is barrel-shaped and has a spring inside; the upper end of the probe extends into the elastic conducting device and is connected to the spring; A vertical guide groove is arranged on the elastic conduction device, and a guide pin is connected to the probe, and the guide pin is connected to the guide groove. During detection, the probe moves along the guide groove to compress the spring, and a pressure value is obtained through the pressure sensor.

7. A key spring force detection device according to claim 1, characterized in that: The calibration assembly comprises a first module set on the machine platform and having a horizontal driving direction, a second module connected to the first module and having a vertical driving direction, and the calibration sensor is connected to the second module; The calibration component also includes a second bracket arranged on the machine platform, a support plate is arranged on the second bracket, a limiting groove is arranged on the support plate, a through hole is arranged at the center of the limiting groove, the weight is arranged in the limiting groove, and the calibration sensor can pass through the through hole and support the weight to realize the calibration of the calibration sensor.

8. A key spring force detection device according to claim 7, characterized in that: The support plate is provided with a clamping jaw device, and the two clamping jaws of the clamping jaw device are provided with V-shaped grooves on opposite sides. When the two clamping jaws are close to each other, the V-shaped grooves contact the weights to achieve the positioning of the weights, so that the weights are located in the center of the limiting grooves.

9. A key spring force detection device according to claim 1, characterized in that: The Z-axis module is connected with a visual positioning device.

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