Touch test device

Abstract

The application relates to a touch test device, which comprises a support and a plurality of compression components, the plurality of compression components are arranged in an array on the support, the compression component comprises a fixing seat, a counterweight module and a pressure head module, the fixing seat is fixed on the support, the counterweight module and the pressure head module are movably arranged on the fixing seat and are located on opposite sides of the fixing seat, the counterweight module comprises a fixing rod and a plurality of counterweight blocks which are detachably stacked on the fixing rod, and the end of the fixing rod close to the pressure head module is configured to abut against the pressure head module. The touch test device provided by the application can change the touch test pressure of the to-be-tested module by increasing or reducing the number of counterweight blocks, the volume of each counterweight block can be reduced due to the stacked arrangement of the plurality of counterweight blocks, the spacing between two adjacent pressure head modules can be set to be small, so that the touch test of two adjacent test points with small spacing can be adapted, the compatibility of the touch test device is expanded, and the touch test cost of the to-be-tested module is reduced.

Description

Technical Field

[0001] This application relates to the field of crimping testing technology, and in particular to a touch testing device. Background Technology

[0002] In manufacturing and modern industrial production, products undergo performance and quality testing before being put into use to ensure their compliance. For example, with the rapid increase in market demand for electronic components such as IC chips and touchscreens, both IC chips and touchscreens are subjected to performance testing before use.

[0003] Currently, the pressure head assembly is typically fixed to a bracket, and the up-and-down movement of the bracket drives the pressure head assembly to perform touch simulation tests on the test points of electronic components to detect their performance. However, when the test pressure changes, a new touch testing device must be replaced to continue the touch simulation test. Due to the poor compatibility of touch testing equipment, this significantly increases testing costs. Utility Model Content

[0004] Therefore, it is necessary to provide a touch testing device to address the problem of poor compatibility of touch testing equipment, which leads to increased testing costs.

[0005] A touch testing device is used to perform touch testing on test points on a module under test, the touch testing device comprising:

[0006] stents; and

[0007] Multiple crimping assemblies are arranged in an array on the bracket. Each crimping assembly includes a fixed base, a counterweight module, and a crimping head module. The fixed base is fixed to the bracket. The counterweight module and the crimping head module are both movably disposed on the fixed base and are located on opposite sides of the fixed base. The counterweight module includes a fixed rod and multiple counterweight blocks detachably stacked on the fixed rod. The end of the fixed rod near the crimping head module is configured to abut against the crimping head module.

[0008] In one embodiment, the counterweight module further includes a bearing rod and a bearing disposed on the bearing rod, the fixing rod is connected to the bearing rod through the bearing, the bearing rod is movably disposed on the fixing seat and configured to abut against the pressure head module.

[0009] In one embodiment, a plurality of the counterweights are stacked on the fixed rod in the extending direction of the fixed rod;

[0010] The counterweight module also includes a locking component, which is detachably mounted on the fixing rod for locking the multiple counterweight blocks to the fixing rod.

[0011] In one embodiment, the pressure head module includes a pressure head and a connecting component, the connecting component being used to movably connect the pressure head to the fixed base.

[0012] In one embodiment, the connecting member includes an abutment member connected to the pressure head and having a mating surface that abuts against the end of the fixing rod near the pressure head module, the outer contour of the mating surface being spherical.

[0013] In one embodiment, the mounting base has a connection hole;

[0014] The pressure head module also has a connecting rod, which is connected to the pressure head and is intermittently inserted into the connecting hole along its extension direction.

[0015] In one embodiment, the connecting component further includes a rotating washer, which is sleeved on the outer peripheral surface of the connecting rod and is at least partially movable within the connecting hole.

[0016] In one embodiment, the rotating pad has a tapered cross-section in its thickness direction, and the rotating pad gradually expands from the pressure head toward the counterweight module, and the rotating pad engages with the connecting hole in a wedge shape.

[0017] In one embodiment, the outer periphery of the connecting rod has a limiting portion, and the inner wall of the connecting hole has a mating portion that cooperates with the limiting portion. The limiting portion is used to restrict the rotation of the connecting rod in its circumferential direction.

[0018] In one embodiment, the touch testing device further includes a driving source, which is tractively connected to the bracket and is used to drive the bracket to move toward or away from the module under test.

[0019] In the aforementioned touch testing device, as the pressure head module approaches the test point of the module under test, both the counterweight module and the pressure head module are movably mounted on the fixed base. The pressure head module applies a reaction force to the counterweight module and lifts it up, causing the counterweight module to apply a preset pressure to the test point of the module under test, thus performing touch testing on the module under test under a preset test pressure environment. Since multiple counterweights are detachably mounted on the fixed rod, the touch testing pressure of the module under test can be changed by increasing or decreasing the number of counterweights. Furthermore, the stacked arrangement of multiple counterweights reduces the volume of each counterweight, allowing for a smaller spacing between adjacent pressure head modules to accommodate touch testing of adjacent test points with small spacing. This expands the compatibility of the touch testing device and reduces the touch testing cost of the module under test. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the touch testing device provided in some embodiments.

[0021] Figure 2 This is an exploded view of the crimping assembly provided in some embodiments.

[0022] Figure 3 This is a front view of the crimping assembly provided in some embodiments.

[0023] Figure 4 for Figure 3 Sectional view along line AA.

[0024] Figure 5 for Figure 4 A magnified view of a portion of region B in the middle.

[0025] Figure 6 This is a schematic diagram of the pressure head module provided in some embodiments.

[0026] Figure 7 This is a schematic diagram of the pressure head module provided in another embodiment.

[0027] Figure label:

[0028] 100. Touch testing device;

[0029] 110. Bracket; 111. Transmission plate; 112. Mounting plate; 113. Connector; 120. Crimping assembly; 121. Fixing base; 122. Counterweight module; 1221. Fixing rod; 1222. Counterweight block; 1223. Bearing rod; 1224. Bearing; 1225. Locking component; 123. Press head module; 1231. Press head; 1232. Connecting component; 1233. Abutment component; 1234. Mating surface; 1235. Connecting rod; 1236. Rotating washer; 1237. Limiting part; 124. Grounding terminal; 130. Drive source;

[0030] 200. Module to be tested. Detailed Implementation

[0031] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0032] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0037] The technical solutions provided by the embodiments of this application are described below with reference to the accompanying drawings.

[0038] See Figure 1 and Figure 2 As shown, this application provides a touch testing device 100, which includes a bracket 110 and multiple pressing components 120. The touch testing device 100 is used to perform touch testing on test points on a module under test 200. In this embodiment, the module under test 200 can be an IC chip, a touch screen, or other electronic components. This application does not limit the specific component types of the module under test 200.

[0039] Multiple crimping components 120 are arrayed on the support 110, such as multiple crimping components 120 being spaced apart on the support 110. Each crimping component 120 includes a fixing base 121, a counterweight module 122, and a crimping head module 123. The fixing base 121 is fixed to the support 110 by screwing, snap-fitting, or other methods. Both the counterweight module 122 and the crimping head module 123 are movably mounted on the fixing base 121, and are located on opposite sides of the fixing base 121. For example, the counterweight module 122 is movably mounted on one side of the fixing base 121, and the crimping head module 123 is movably mounted on the other side of the fixing base 121. The counterweight module 122 includes a fixing rod 1221 and multiple counterweight blocks 1222. The multiple counterweight blocks 1222 are detachably stacked on the fixing rod 1221. The end of the fixing rod 1221 near the crimping head module 123 is configured to abut against the crimping head module 123. Thus, during the process of the pressure head module 123 contacting the test point of the test module 200, since both the counterweight module 122 and the pressure head module 123 are movably mounted on the fixed base 121, the pressure head module 123 applies a reaction force to the counterweight module 122 and lifts the counterweight module 122. The gravity of the counterweight module 122 is transmitted to the pressure head module 123 in the form of contact, so that the counterweight module 122 applies a preset pressure to the test point of the test module 200 by pressing the test module 200, so as to perform multi-point touch test on the test module 200 under the preset test pressure environment and improve the touch test efficiency of the test module 200.

[0040] The aforementioned touch testing device 100, with multiple counterweights 1222 detachably mounted on the fixing rod 1221, allows for adjustments to the touch testing pressure of the module under test 200 by increasing or decreasing the number of counterweights 1222. This eliminates the need to replace the touch testing device 100, enabling it to adapt to touch testing of the module under test 200 under different pressure environments. Furthermore, the stacked arrangement of multiple counterweights 1222 reduces the volume of each counterweight 1222 compared to a traditional single counterweight 1222, allowing for smaller spacing between adjacent pressure head modules 123 to accommodate touch testing of adjacent test points with smaller spacing. This expands the compatibility of the touch testing device 100 and reduces the touch testing cost of the module under test 200.

[0041] In one embodiment, see Figure 1 and Figure 2 As shown, the counterweight module 122 also includes a bearing rod 1223 and a bearing 1224. The bearing 1224 is disposed on the bearing rod 1223, and the fixing rod 1221 is connected to the bearing rod 1223 through the bearing 1224. The bearing rod 1223 is movably disposed on the fixing seat 121, and the bearing rod 1223 is configured to abut against the pressure head module 123. Thus, when the pressure head module 123 abuts against the test point of the test module 200, the pressure head module 123 transmits the abutting force to the bearing rod 1223, and the bearing rod 1223 transmits the abutting force to the fixing rod 1221 through the bearing 1224, thereby lifting up multiple counterweights 1222. The weight of the multiple counterweights 1222 is transmitted to the pressure head module 123 in an abutting manner to perform touch testing on the test module 200 under a preset test pressure environment.

[0042] The bearing 1224 serves as the connecting element between the bearing rod 1223 and the fixed rod 1221, enabling reliable transmission of the abutment force and supporting multiple counterweights 1222 to ensure the positional stability of the counterweight module 122.

[0043] Further, see Figure 1 and Figure 2 As shown, multiple counterweights 1222 are stacked on the fixed rod 1221 along its extension direction. The counterweights 1222 may be block-shaped and composed of elements such as iron or copper, possessing a certain mass. Multiple counterweights 1222 are stacked along their thickness direction. On one hand, by increasing or decreasing the number of stacked counterweights 1222, the touch test pressure of the module under test 200 can be changed. On the other hand, under the same mass condition, by reducing the volume of each counterweight 1222 in its circumferential direction and increasing the number of stacked counterweights 1222, the spacing between two adjacent pressure head modules 123 can be set to be smaller, accommodating touch tests of two adjacent test points with small spacing, thus expanding the compatibility of the touch test device 100.

[0044] The counterweight module 122 also includes a locking member 1225, which is detachably mounted on the fixing rod 1221. The locking member 1225 is used to lock multiple counterweights 1222 onto the fixing rod 1221, thereby achieving a detachable connection between the multiple counterweights 1222 and the fixing rod 1221. For example, if the locking member 1225 is a lock nut, unscrewing the locking member 1225 from the fixing rod 1221 allows for the addition or removal of counterweights 1222 from the fixing rod 1221. Conversely, screwing the locking member 1225 onto the fixing rod 1221 allows for the installation of counterweights 1222 onto the fixing rod 1221, ensuring the stability of the installation structure between the counterweights 1222 and the fixing rod 1221. Of course, in other feasible embodiments, the locking member 1225 can also be a locking valve or other locking element that can be detachably connected to the fixing rod 1221.

[0045] Because the module under test 200 may be affected by factors such as placement and molding process during touch testing, at least some test points of the module under test 200 may be tilted relative to the preset test plane. Based on this, refer to Figure 1 and Figure 2 As shown, the pressure head module 123 includes a pressure head 1231 and a connecting component 1232. The connecting component 1232 is used to movably connect the pressure head 1231 to the fixed base 121. In this way, by movably connecting the pressure head 1231 to the fixed base 121 through the connecting component 1232, the pressure head 1231 can change its posture within a small range during the process of contacting the module under test 200. The pressure head 1231 can adaptively change the pressing position with the test point of the module under test 200 to ensure the pressing position accuracy and reliability between the pressure head 1231 and the test point of the module under test 200.

[0046] Among them, see Figure 1 and Figure 2 As shown, the crimping assembly 120 also includes a grounding terminal 124, which is connected to the crimping head module 123. Thus, by providing a grounding terminal 124 in the crimping head module 123, the module under test 200 (IC chip, touch screen and other electronic components) is protected from electrostatic discharge damage, creating a safe and reliable touch testing environment.

[0047] For details, please refer to [link / reference]. Figures 3-5As shown, the connecting component 1232 includes an abutment member 1233. The abutment member 1233 is connected to the pressure head 1231, and the abutment member 1233 has a mating surface 1234 that abuts against the end of the fixing rod 1221 near the pressure head module 123. The outer contour of the mating surface 1234 is spherical. During the process of the pressure head 1231 abutting against the test point of the test module 200, since the abutment member 1233 is disposed between the pressure head module 123 and the fixing rod 1221, the abutment force can be transmitted to the fixing rod 1221 through the abutment member 1233. The weight of the multiple counterweights 1222 stacked on the fixing rod 1221 is transmitted to the pressure head module 123 in the form of abutment, so as to perform touch test on the test module 200 under a preset test pressure environment. Since the outer contour of the mating surface 1234 is spherical, the contact part 1233 and the fixed rod 1221 or bearing rod 1223 are in line contact. When the pressure receiving module 200 is tilted and pressed against the test point of the module 200 to be tested, the stable fit between the contact part 1233 and the fixed rod 1221 or bearing rod 1223 can be guaranteed, so as to ensure that the counterweight block 1222 can stably transmit the gravity to the pressure head module 123 in the form of contact.

[0048] Further, see Figure 1 , Figure 2 and Figure 5 As shown, the fixing base 121 has a connecting hole. Preferably, the connecting hole is integrally formed on the fixing base 121 by injection molding, extrusion, or other methods to simplify the molding process of setting the connecting hole on the fixing base 121. The pressure head module 123 also has a connecting rod 1235, which is connected to the pressure head 1231. Preferably, the connecting rod 1235 is integrally formed on the pressure head 1231 by injection molding, extrusion, or other methods to simplify the molding process of setting the connecting rod 1235 on the pressure head 1231 and improve the structural strength between the pressure head 1231 and the connecting rod 1235. The connecting rod 1235 is inserted into the connecting hole with a gap along its extension direction, that is, there is a gap between the connecting rod 1235 and the inner wall of the connecting hole. The connecting rod 1235 can move slightly in the connecting hole. The pressure head 1231 is movably set on the fixed seat 121 through the connecting rod 1235. The pressure head 1231 can change its posture within a small range when it comes into contact with the test module 200. The pressure head 1231 can adaptively change the pressing position with the test point of the test module 200 to ensure the pressing position accuracy and reliability between the pressure head 1231 and the test point of the test module 200.

[0049] Further, see Figure 1 , Figure 2 and Figure 5As shown, the connecting component 1232 also includes a rotating washer 1236. The rotating washer 1236 is sleeved on the outer peripheral surface of the connecting rod 1235, and the rotating washer 1236 is at least partially movable within the connecting hole. In this way, the rotating washer 1236 allows for slight oscillation between the connecting rod 1235 and the fixed base 121, so that the pressure head 1231 can change its posture within a small range during the process of contacting the module under test 200. The pressure head 1231 can adaptively change the pressing position with the test point of the module under test 200 to ensure the accuracy and reliability of the pressing position between the pressure head 1231 and the test point of the module under test 200.

[0050] Furthermore, see Figure 1 , Figure 2 and Figure 5 As shown, the rotating pad 1236 has a tapered cross section in its thickness direction, and the rotating pad 1236 gradually expands from the pressure head 1231 toward the counterweight module 122. For example, in the stacking direction of multiple counterweight blocks 1222, the rotating pad 1236 gradually expands, and the rotating pad 1236 is wedge-shaped with the connecting hole. Thus, during the process of the pressure head 1231 contacting the test point of the receiving module 200, the rotating pad 1236 can float along the pressure head 1231 toward the counterweight module 122 due to the wedge-shaped fit between the rotating pad 1236 and the connecting hole. Since the rotating pad 1236 has a tapered cross section in its thickness direction and gradually expands from the pressure head 1231 toward the counterweight module 122, the rotating pad 1236 can tilt within the connecting hole, allowing a slight swing between the connecting rod 1235 and the fixed seat 121. This allows the pressure head 1231 to change its posture within a small range during the process of contacting the receiving module 200, and the pressure head 1231 can adaptively change its contact position with the test point of the receiving module 200.

[0051] In one embodiment, see Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, the outer periphery of the connecting rod 1235 has a limiting portion 1237, and the inner wall of the connecting hole has a mating portion that can engage with the limiting portion 1237. The limiting portion 1237 is used to restrict the rotation of the connecting rod 1235 in its circumferential direction. Thus, by limiting the rotation of the connecting rod 1235 in its circumferential direction through the limiting portion 1237, the positional certainty of the pressure head 1231 and the test point of the module under test 200 during the touch test is ensured, thereby improving the reliability of the touch test results of the module under test 200.

[0052] In this embodiment, the limiting part 1237 can be a limiting plane, a limiting boss, or a limiting groove, and the mating part can be a mating plane, a mating groove, or a mating boss. It should be noted that the limiting part 1237 and the mating part have a mating gap during the mating process, so as to allow the pressure head 1231 to change its position within a small range when it comes into contact with the receiving module 200.

[0053] In one embodiment, see Figure 1 and Figure 2 As shown, the touch testing device 100 also includes a drive source 130. The drive source 130 is connected to the bracket 110 and is used to drive the bracket 110 to move toward or away from the module under test 200. For example, the drive source 130 outputs power to the bracket 110 and drives the bracket 110 to move toward the module under test 200. The bracket 110 drives multiple pressing components 120 to move toward the module under test 200. The multiple pressing components 120 are simultaneously pressed onto multiple test points of the module under test 200, improving the touch test efficiency of the module under test 200. After the touch test of the module under test 200 is completed, the drive source 130 outputs power in the opposite direction to the bracket 110 and drives the bracket 110 to move away from the module under test 200. The bracket 110 drives multiple pressing components 120 to move away from the module under test 200. The multiple pressing components 120 are separated from the module under test 200 so that the module under test 200 can be replaced and the touch test can be performed again.

[0054] In this embodiment, the drive source 130 can be a drive motor, drive cylinder or other power components. This application does not limit the specific component type of the drive source 130.

[0055] Further, see Figure 1 and Figure 2As shown, the bracket 110 includes a transmission plate 111, a mounting plate 112, and multiple connectors 113. The multiple connectors 113 connect the transmission plate 111 and the mounting plate 112, and are spaced apart along the circumferential direction of the mounting plate 112. If a connector 113 is a rod-shaped structure, one end of the connector 113 is fixed to the transmission plate 111, and the other end is fixed to the mounting plate 112. Connecting the transmission plate 111 and the mounting plate 112 via the connectors 113 forms the bracket 110, reducing the overall volume and weight of the bracket 110 and lowering its molding cost. The transmission plate 111 is connected to the drive source 130. The mounting plate 112 is used to set multiple crimping components 120. For example, the mounting plate 112 is provided with multiple insertion holes. The crimping components 120 are movably inserted into the insertion holes to realize the installation connection between the crimping components 120 and the bracket 110. The drive source 130 outputs power to the transmission plate 111 to drive the bracket 110 to move towards or away from the module under test 200, so as to realize the touch test of the module under test 200.

[0056] In one embodiment, see Figure 1 and Figure 2 As shown, the shape of the pressure head 1231 can be circular or square. For example... Figure 6 As shown, the pressure head 1231 is circular, used for touch testing of test points in a circular area. For example... Figure 7 As shown, the pressure head 1231 is square to perform touch tests on test points in a square area. Thus, by adaptively setting the shape of the pressure head 1231, touch tests on test points with different distribution shapes can be completed.

[0057] Of course, in other feasible embodiments, the shape of the pressure head 1231 can also be rhomboid, trapezoidal or other shapes. This application does not limit the specific shape of the pressure head 1231.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A touch testing device for performing touch testing on test points on a module under test, characterized in that, The touch testing device includes: stents; and Multiple crimping assemblies are arranged in an array on the bracket. Each crimping assembly includes a fixed base, a counterweight module, and a crimping head module. The fixed base is fixed to the bracket. The counterweight module and the crimping head module are both movably disposed on the fixed base and are located on opposite sides of the fixed base. The counterweight module includes a fixed rod and multiple counterweight blocks detachably stacked on the fixed rod. The end of the fixed rod near the crimping head module is configured to abut against the crimping head module.

2. The touch testing device according to claim 1, characterized in that, The counterweight module also includes a bearing rod and a bearing disposed on the bearing rod. The fixing rod is connected to the bearing rod through the bearing. The bearing rod is movably disposed on the fixing seat and is configured to abut against the pressure head module.

3. The touch testing device according to any one of claims 1 or 2, characterized in that, In the extending direction of the fixed rod, a plurality of the counterweights are stacked on the fixed rod; The counterweight module also includes a locking component, which is detachably mounted on the fixing rod for locking the multiple counterweight blocks to the fixing rod.

4. The touch testing device according to claim 1, characterized in that, The pressure head module includes a pressure head and a connecting component, wherein the connecting component is used to movably connect the pressure head to the fixed base.

5. The touch testing device according to claim 4, characterized in that, The connecting component includes an abutment member connected to the pressure head and having a mating surface that abuts against the end of the fixing rod near the pressure head module. The outer contour of the mating surface is spherical.

6. The touch testing apparatus according to any one of claims 4 or 5, characterized in that, The mounting base has a connection hole; The pressure head module also has a connecting rod, which is connected to the pressure head and is intermittently inserted into the connecting hole along its extension direction.

7. The touch testing device according to claim 6, characterized in that, The connecting component further includes a rotating washer, which is sleeved on the outer circumferential surface of the connecting rod and is at least partially movable within the connecting hole.

8. The touch testing device according to claim 7, characterized in that, The rotating pad has a tapered cross-section in its thickness direction, and the rotating pad gradually expands from the pressure head toward the counterweight module. The rotating pad is wedge-shaped and engages with the connecting hole.

9. The touch testing device according to claim 6, characterized in that, The outer circumference of the connecting rod has a limiting part, and the inner wall of the connecting hole has a mating part that cooperates with the limiting part. The limiting part is used to restrict the rotation of the connecting rod in its circumferential direction.

10. The touch testing device according to claim 1, characterized in that, The touch testing device also includes a driving source, which is connected to the bracket and is used to drive the bracket to move toward or away from the module under test.

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