Test fixture

Abstract

The utility model relates to a test fixture used for testing a crown of a wearable device, the test fixture comprises a mounting substrate, a first cylinder, a clamping part, a first driving assembly and a second driving assembly, the driving end of the first cylinder is fixedly connected with the mounting substrate, and the first cylinder is used for driving the mounting substrate to move to a preset position; the clamping part comprises a clamping state and a releasing state, in the clamping state, the clamping part can clamp the watch crown, and in the releasing state, the clamping part can release the clamped watch crown; the first driving assembly is arranged on the mounting base plate and is in driving connection with the clamping part, and the first driving assembly is used for driving the clamping part to rotate; the second driving assembly is arranged on the mounting base plate and used for driving the clamping part to be switched between the clamping state and the releasing state. Therefore, the structure of the test fixture is simpler and more compact, the cost is reduced, the size of the test fixture is effectively reduced, and the miniaturization design of the test fixture is facilitated.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of testing equipment, and in particular, to a test fixture. BACKGROUND

[0002] A crown is usually arranged on a wearable device such as a smart watch, and quick control can be realized through the crown. Before the smart watch is shipped, the crown needs to be tested by a test fixture for rotation calibration. However, the test fixture in the related art has problems of large size and complex structure. CONTENT OF THE UTILITY MODEL

[0003] To overcome the problems in the related art, the present disclosure provides a test fixture.

[0004] The present disclosure provides a test fixture for testing a crown of a wearable device, the test fixture comprising: a mounting substrate; a first air cylinder, a driving end of the first air cylinder being fixedly connected with the mounting substrate, the first air cylinder being configured to drive the mounting substrate to move to a preset position; a clamping portion, the clamping portion comprising a clamping state and a release state, in the clamping state, the clamping portion is capable of clamping the crown, in the release state, the clamping portion is capable of releasing the clamped crown; a first driving assembly, the first driving assembly being arranged on the mounting substrate and being drivingly connected with the clamping portion, the first driving assembly being configured to drive rotation of the clamping portion; and a second driving assembly, the second driving assembly being arranged on the mounting substrate, the second driving assembly being configured to drive the clamping portion to switch between the clamping state and the release state.

[0005] In some embodiments of the present disclosure, the mounting substrate comprises a first surface and a second surface facing away from each other, and the first driving assembly comprises: a driving motor fixed to the first surface, and an output shaft of the driving motor extending from the first surface to the second surface; and a connecting shaft, a first end of the connecting shaft being drivingly connected with the output shaft of the driving motor through a shaft coupling, and a second end of the connecting shaft being fixedly connected with the clamping portion.

[0006] In some embodiments of the present disclosure, the second driving assembly comprises: a pressing assembly arranged on the connecting shaft and being movable along the connecting shaft between a first position and a second position, in the first position, the clamping portion is in the release state, and in the second position, the pressing assembly causes the clamping portion to be in the clamping state; and a second air cylinder fixed to the second surface, a driving end of the second air cylinder being connected with the pressing assembly, the second air cylinder being configured to drive movement of the pressing assembly.

[0007] In some embodiments of the present disclosure, the pressing assembly comprises: a sleeve, sleeved on the connecting shaft, in the second position, a first port of the sleeve is sleeved on the clamping part, so that the clamping part is in the clamping state; a push plate, the push plate is sleeved on the connecting shaft through a through hole and is located between a second port of the sleeve and the mounting base plate, and the push plate is connected with a driving end of the second cylinder; an elastic member, one end of the elastic member is fixed to the second port of the sleeve, and the other end of the elastic member is fixed to the push plate.

[0008] In some embodiments of the present disclosure, the second driving assembly further comprises: a fixed part, the fixed part is fixed to the second surface, and the second cylinder is fixed to the fixed part.

[0009] In some embodiments of the present disclosure, the clamping part comprises an open-ended cylindrical structure, and the cylindrical structure is an elastic member, the cylindrical structure comprises a first segment and a second segment connected in series, one end of the first segment is connected in communication with the second segment, the other end of the first segment is fixed to the second end of the connecting shaft, one end of the second segment is connected in communication with the first segment, the other end of the second segment is open, and the second segment is used to reach the clamping state by deformation.

[0010] In some embodiments of the present disclosure, the inner surface of the second segment is provided with a plurality of grooves at intervals, the extension direction of the grooves is parallel to the axial direction of the cylindrical structure, and the plurality of grooves are used to cause the second segment to deform.

[0011] In some embodiments of the present disclosure, the plurality of grooves are uniformly distributed along the circumference of the second segment, and the angle between the groove bottom wall of each groove and the center line of the cylindrical structure is 9-11 degrees.

[0012] In some embodiments of the present disclosure, the wall thickness of the second segment at the position of the groove bottom wall corresponding to each groove is 0.45-0.55 mm; and / or, the length of the diameter of the inner cavity of the second segment greater than the outer diameter of the crown is 0.15-0.25 mm; and / or, the length of the depth of the inner cavity of the second segment greater than the thickness of the crown is 1.45-1.55 mm.

[0013] In some embodiments of the present disclosure, the second segment is a tapered structure, the diameter of the second segment gradually increases from the first segment to the open end of the second segment, and the taper angle of the tapered structure is 25-35 degrees.

[0014] In some embodiments of the present disclosure, the test fixture further comprises: a base, the first cylinder is fixed on the base.

[0015] In some embodiments of the present disclosure, the test fixture further comprises a stopper disposed on the base, the stopper being configured to stop the mounting substrate at the preset position.

[0016] In some embodiments of the present disclosure, the stopper comprises a plate structure, the base is provided with a limiting slot corresponding to the position of the plate structure, the plate structure is fastened in the limiting slot by a screw, and the plate structure protrudes from the slot of the limiting slot.

[0017] In some embodiments of the present disclosure, the length of the limiting slot is greater than the length of the plate structure along the moving direction of the mounting substrate, at least one slide is disposed on the plate structure, the extension direction of the slide is parallel to the moving direction of the mounting substrate, and the screw cooperates with the plate structure to adjust the position of the preset position.

[0018] The technical scheme provided by the embodiments of the present disclosure can have the following beneficial effects:

[0019] The present disclosure provides a test fixture, a driving end of a first air cylinder is fixedly connected with a mounting substrate, the first air cylinder is configured to drive the mounting substrate to move to a preset position, a first driving assembly and a second driving assembly are both disposed on the mounting substrate, a clamping portion has a clamping state and a release state, and the clamping portion is switched between the clamping state and the release state by the second driving assembly. In the clamping state, the clamping portion can clamp a crown, and then the clamping portion is driven to rotate by the first driving assembly to realize testing of the crown of the wearable device, and in the release state, the clamping portion can release the crown. In this way, the structure of the test fixture is more simple and compact, the cost is reduced, the volume of the test fixture is effectively reduced, thereby not only facilitating the miniaturization design of the test fixture, but also effectively ensuring the coaxiality of the test fixture and improving the accuracy of the test data of the crown of the test fixture.

[0020] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure.

[0022] Figure 1 is a schematic view of the positional relationship between the crown and the test fixture according to an exemplary embodiment;

[0023] Figure 2 is a schematic view of the structure of the test fixture when the clamping portion is in the release state according to an exemplary embodiment; is a schematic view of the structure of the test fixture when the clamping portion is in the release state according to an exemplary embodiment;

[0024] Figure 3 Fig. 3 is a structural schematic view of a clamping part according to an example embodiment when the clamping part is in a clamping state;

[0025] Figure 4 Fig. 4 is an exploded schematic view of a test fixture according to an example embodiment;

[0026] Figure 5 Fig. 5 is a structural schematic view of a clamping part according to an example embodiment;

[0027] Figure 6 Fig. 6 is a structural schematic view of a clamping part according to another example embodiment;

[0028] Figure 7 Fig. 7 is a structural schematic view of a clamping part according to yet another example embodiment;

[0029] Figure 8 is Figure 7 a sectional view in A-A direction in Fig. 1.

[0030] in the figure:

[0031] 1 - test fixture; 11 - clamping part; 111 - first section; 112 - second section; 113 - groove; 114 - anti-skid stripe; 115 - extension; 116 - mounting hole; 12 - first air cylinder; 13 - mounting base plate; 14 - driving motor; 15 - connecting shaft; 151 - shaft coupling; 16 - pressing assembly; 161 - sleeve; 162 - push plate; 163 - elastic member; 17 - second air cylinder; 171 - fixed part; 18 - base; 181 - limiting groove; 19 - stop part; 191 - slide way; 2 - crown. DETAILED DESCRIPTION

[0032] The example embodiments will be described in detail herein with reference to the accompanying drawings. In the following description, unless otherwise indicated, like numbers in the different drawings represent the same or similar elements. The following detailed description does not, therefore, limit the scope of the disclosure, but the scope of the disclosure is defined by the appended claims.

[0033] A crown is usually provided on a wearable device such as a smart watch, and quick control can be achieved through the crown, for example, adjusting time, quickly viewing notification information, quickly accessing applications, smart interaction, screen wake-up and sleep, etc. Before the smart watch is shipped, the crown needs to be tested for rotation calibration by a test fixture to ensure the consistency of the actual physical rotation angle of the crown and the collected angle data of the sensor inside the watch.

[0034] However, the test fixture in the related art has the problems of large size and complex structure. For example, in the related art, the test fixture includes a mounting platform, on which are arranged a claw cylinder, a sliding sleeve, a push sleeve plate, a direct drive mounting plate, a sliding block guide rail assembly, a linear driving mechanism, a sliding guide rod, a buffer spring, a connecting block, a pressure sensor, a sensor mounting seat, and a rotary driving mechanism, etc. The claw cylinder is driven to a clamping position by the linear driving mechanism, and then the crown is clamped and rotated by the rotary driving mechanism. The test fixture has a complex structure and a large size, resulting in high cost.

[0035] To solve the above technical problems, the present disclosure provides a test fixture. The driving end of the first air cylinder is fixedly connected with the mounting base plate. The first air cylinder is used to drive the mounting base plate to move to a preset position. The first driving assembly and the second driving assembly are both arranged on the mounting base plate. The clamping part has a clamping state and a release state. The clamping part is switched between the clamping state and the release state by the second driving assembly. In the clamping state, the clamping part can clamp the crown. Then the clamping part is driven to rotate by the first driving assembly to realize the test of the crown of the wearable device. In the release state, the clamping part can release the crown. In this way, the structure of the test fixture is more simple and compact. The cost is reduced, and the size of the test fixture is effectively reduced. Therefore, not only is the miniaturization design of the test fixture facilitated, but also the coaxiality of the test fixture is effectively ensured, and the accuracy of the test data of the crown by the test fixture is improved.

[0036] An example embodiment of the present disclosure provides a test fixture for testing the crown of a wearable device. The wearable device may, for example, be a smart watch, a smart bracelet, etc. with a crown, and the wearable device with the crown adopts an optoelectronic knob. The crown can be tested for rotation calibration by the test fixture.

[0037] In the test process, as shown in Figure 1 , the crown 2 needs to be coaxially aligned with the clamping part 11 to ensure the accuracy of the test data of the crown 2 while avoiding damage to the wearable device.

[0038] As shown in Figure 1 and Figure 2As shown, the test fixture 1 comprises a mounting base plate 13, a first air cylinder 12, a clamping part 11, a first driving assembly and a second driving assembly. The driving end of the first air cylinder 12 is fixedly connected with the mounting base plate 13, for example, the mounting base plate 13 can be fixedly connected with the driving end of the first air cylinder 12 through at least one screw, for example, 2 hexagonal head cylinder screws M4x12, and the first air cylinder 12 is used to drive the mounting base plate 13 to move to a preset position. The first air cylinder 12 can be a slide table air cylinder, for example, to improve the accuracy of driving the mounting base plate 13 to move, thereby facilitating to improve the accuracy of the test data of the watch crown 2. It can be understood that the preset position refers to a position that can enable the clamping part 11 to clamp and release the watch crown 2, for example, when the mounting base plate 13 is at the preset position, the clamping part 11 can wrap at least part of the watch crown 2, and the watch crown 2 is clamped when the clamping part 11 is in the clamping state.

[0039] In combination Figure 2 and Figure 3 , the first driving assembly and the second driving assembly are both arranged on the mounting base plate 13 and are drivingly connected with the clamping part 11. The clamping part 11 comprises a clamping state and a release state, and the second driving assembly can drive the clamping part 11 to switch between the clamping state and the release state. When the clamping part 11 is in the clamping state, the clamping part 11 can clamp the watch crown 2. Then the clamping part 11 is driven to rotate by the first driving assembly to realize the rotation calibration test of the watch crown 2. After the test is completed, the clamping part 11 is driven to the release state by the second driving assembly. When the clamping part 11 is in the release state, the clamping part 11 can release the clamped watch crown 2.

[0040] With such a setting form, the structure of the test fixture 1 is more simple and compact, which not only facilitates the miniaturization design of the test fixture 1, but also effectively guarantees the coaxiality of the test fixture 1 and improves the accuracy of the test data of the watch crown 2.

[0041] In combination Figure 2 , Figure 3 and Figure 4In an embodiment, the mounting substrate 13 comprises a first surface and a second surface facing away from each other. The first driving assembly comprises a driving motor 14 and a connecting shaft 15. The driving motor 14 is fixed on the first surface, for example, by at least one screw, for example, four socket head cap screws M2x8, on the first surface of the mounting substrate 13, and the output shaft of the driving motor 14 extends from the first surface to the second surface. The first end of the connecting shaft 15 is drivingly connected to the output shaft of the driving motor 14 through a coupling 151, and the second end of the connecting shaft 15 is fixedly connected to the clamping part 11. The driving motor 14 drives the connecting shaft 15 to rotate, thereby driving the clamping part 11 to rotate. In this way, the structure of the first driving assembly is simple, facilitating assembly, and further reducing the volume of the test fixture 1.

[0042] In combination with Figure 2 , Figure 3 and Figure 4 , in an embodiment, the second driving assembly comprises a pressing assembly 16 and a second cylinder 17. The pressing assembly 16 is arranged on the connecting shaft 15 and is movable along the connecting shaft 15 between a first position and a second position. The second cylinder 17 is fixed on the second surface of the mounting substrate 13, the driving end of the second cylinder 17 is connected to the pressing assembly 16, and the second cylinder 17 can drive the pressing assembly 16 to move along the connecting shaft 15 between the first position and the second position. When the pressing assembly 16 is in the first position, the clamping part 11 is in a released state. When the pressing assembly 16 is in the second position, the clamping part 11 is in a clamped state by the pressing assembly 16 to achieve clamping of the crown 2. In this way, the structure of the second driving assembly is simple, facilitating assembly, and further reducing the volume of the test fixture 1.

[0043] In combination with Figure 2 , Figure 3 and Figure 4In an embodiment, the pressing assembly 16 comprises a sleeve 161, a push plate 162 and an elastic member 163. The sleeve 161 is sleeved on the connecting shaft 15, and when the pressing assembly 16 is in the second position, a first port of the sleeve 161 is sleeved on the clamping portion 11 so that the clamping portion 11 is in the clamping state. The push plate 162 is sleeved on the connecting shaft 15 through a through hole and is located between a second port of the sleeve 161 and the mounting base plate 13, and the push plate 162 is connected with a driving end of the second air cylinder 17. For example, the push plate 162 and the driving end of the second air cylinder 17 can be fixedly connected through a special-shaped stepped hole, bonding, screw fastening or the like. One end of the elastic member 163 is fixed to the second port of the sleeve 161, and the other end of the elastic member 163 is fixed to the push plate 162. With such a setting form, the structure of the pressing assembly 16 is simple and compact, the coaxiality of the test fixture 1 can be effectively ensured while the crown 2 is clamped, and thus the accuracy of the test data of the test fixture 1 on the crown 2 is improved.

[0044] In combination Figure 4 In an embodiment, the second driving assembly further comprises a fixing portion 171 fixed to the second surface. For example, the fixing portion 171 can be fixed to the second surface of the mounting base plate 13 through at least one screw and / or at least one cylindrical pin, such as two internal hexagonal cylindrical head screws M3x8 and two cylindrical pins φ2x10. The second air cylinder 17 is fixed to the fixing portion 171, for example, through two internal hexagonal cylindrical head screws M3x18.

[0045] In an embodiment, the fixing portion 171 comprises a first plate and a second plate connected with each other, and the first plate and the second plate are perpendicular to each other. The first plate is fixedly connected with the second surface of the mounting base plate 13, and the second air cylinder 17 is fixed to the second plate. In this way, the structure of the fixing portion 171 is simple, and the production and processing are facilitated.

[0046] In combination Figure 4 And Figure 5 In an embodiment, the clamping portion 11 comprises a cylindrical structure with one end open, and the cylindrical structure is an elastic material member, which can be, for example, a silica gel material or a rubber material.

[0047] The cylindrical structure comprises a first segment 111 and a second segment 112 connected with each other. One end of the first segment 111 is connected with the second segment 112, and the other end of the first segment 111 is fixed to the second end of the connecting shaft 15. For example, the other end of the first segment 111 can be fastened to the second end of the connecting shaft 15 through a screw, and the screw can be, for example, an internal hexagonal cylindrical head screw M3x8.

[0048] One end of the second segment 112 of the cylindrical structure is connected to the first segment 111, and the other end of the second segment 112 is open. The second segment 112 is used to reach the clamping state through deformation. When the clamping assembly 16 is in the second position, the first end of the sleeve 161 is fitted onto the second segment 112 of the cylindrical structure, and the second segment 112 deforms to reach the clamping state. This arrangement simplifies the structure of the clamping part 11, making it easier to manufacture and assemble, while also making the structure of the test fixture 1 simpler and more compact. Furthermore, it avoids wear, scratches, and other damage to the crown 2 caused by the clamping part 11, thereby improving the reliability of the test fixture 1.

[0049] In this embodiment, the testing steps for crown 2 each time are as follows:

[0050] Combination Figure 2 and Figure 3 Driven by the first cylinder 12, the mounting base 13, the clamping part 11 disposed on the mounting base 13, the first driving assembly, and the second driving assembly are moved to a preset position. At this time, the clamping part 11 is in a released state, and the... Figure 1 and Figure 5 The second section 112 of the clamping part 11 is fitted onto the outside of the crown 2.

[0051] Combination Figure 2 and Figure 3 Driven by the second cylinder 17, the push plate 162 moves along the connecting shaft 15 from the first position to the second position. The elastic element 163 is compressed and pushes the sleeve 161 towards the clamping part 11 until it reaches the second position. The first end of the sleeve 161 is fitted onto the clamping part 11, and the clamping part 11 is in a clamping state to clamp the crown 2. Then, the connecting shaft 15 is driven to rotate by the drive motor 14, thereby driving the clamping part 11 to rotate for testing.

[0052] After the test is completed, the second cylinder 17 drives the push plate 162 to move toward the first position, and the elastic element 163 and sleeve 161 also reset. Until they move to the first position, the clamping part 11 is in the released state to release the clamped crown 2.

[0053] Combination Figure 7 and Figure 8 In one embodiment, an annular groove is provided on the second end of the connecting shaft 15, and a mounting hole 116 for a screw is provided on the end of the first segment 111 facing the connecting shaft 15. An extension 115 protrudes from the outer end face of the first segment 111 facing the connecting shaft 15 around the mounting hole 116, and the extension 115 is fitted into the annular groove on the second end of the connecting shaft 15. This improves the stability of the fixation between the clamping part 11 and the connecting shaft 15, thereby further ensuring the coaxiality when the clamping part 11 is driven to rotate.

[0054] In combination Figure 5 and Figure 6 In an embodiment, the inner surface of the second section 112 is provided with a plurality of grooves 113, for example, 2, 4, 5, 6, etc. The extension direction of the grooves 113 is parallel to the axial direction of the cylindrical structure, and the plurality of grooves 113 are used to cause the second section 112 to deform.

[0055] By providing a plurality of grooves 113, it is convenient for the second section 112 of the cylindrical structure to deform. When the first port of the sleeve 161 is sleeved on the second section 112 of the cylindrical structure, the second section 112 deforms and shrinks under stress, so that the second section 112 can tightly clamp the crown 2, avoiding relative sliding between the crown 2 and the clamping part 11 during the rotation of the clamping part 11, thereby further improving the accuracy of the test data of the crown 2 by the test fixture 1.

[0056] In combination Figure 6 In an embodiment, the plurality of grooves 113 are uniformly distributed along the circumference of the second section 112. For example, when there are 6 grooves 113, the included angle a1 between two adjacent grooves 113 is 60 degrees. In combination Figure 8 , the angle a2 between the groove bottom wall of each groove 113 and the center line of the cylindrical structure is 9 to 11 degrees. By adopting such a setting form, the deformation amount of the second section 112 can improve the clamping effect on the crown 2 while ensuring the structural strength of the second section 112, thereby further improving the reliability of the test device.

[0057] In an embodiment, the wall thickness of the second section 112 corresponding to the position of the groove bottom wall of each groove 113 is 0.45 to 0.55 mm, for example, 0.5 mm. In this way, the clamping effect on the crown 2 can be ensured while the structural strength of the second section 112 is ensured, thereby further improving the reliability of the test device.

[0058] In another embodiment, the inner cavity diameter of the second section 112 is greater than the outer diameter of the crown 2 by a length of 0.15 to 0.25 mm, for example, 0.2 mm. The inner cavity depth of the second section 112 is greater than the thickness of the crown 2 by a length of 1.45 to 1.55 mm, for example, 1.5 mm. In this way, the clamping effect on the crown 2 can be improved while the volume of the clamping part 11 is reduced, thereby further reducing the volume of the test fixture 1.

[0059] In combination Figure 5In another embodiment, anti-skid lines 114 are arranged on the inner surface between the adjacent grooves 113 of the second section 112 to increase the friction between the bezel 2 and the clamping portion 11, so as to avoid the relative sliding between the bezel 2 and the clamping portion 11 during rotation, thereby further improving the accuracy of the test data of the bezel 2.

[0060] In another embodiment, the edge of the second section 112 away from the port of the first section 111 is chamfered, so as to facilitate the bezel 2 to extend into the second section 112.

[0061] In combination Figure 7 In an embodiment, the second section 112 has a tapered structure, the diameter of the second section 112 gradually increases from the first section 111 to the open end of the second section 112, and the taper angle a3 of the tapered structure is 25-35 degrees, for example, 30 degrees. Exemplarily, the inner surface taper angle and the outer surface taper angle of the tapered structure are both 25-35 degrees. With such a setting form, the second section 112 can be deformed under the action of the sleeve 161 to clamp the bezel 2, thereby further improving the clamping effect of the bezel 2.

[0062] In combination Figure 2 In an embodiment, the test fixture 1 further comprises a base 18, and the first air cylinder 12 is fixed to the base 18. By arranging the base 18, the fixation of the first air cylinder 12 is facilitated, and the test fixture 1 can be installed and fixed to an external device, thereby improving the use convenience of the test fixture 1.

[0063] In combination Figure 2 In an embodiment, the test fixture 1 further comprises a stop portion 19 arranged on the base 18, and the stop portion 19 is used to stop the mounting substrate 13 at a preset position. Exemplarily, the stop portion 19 can be a protruding structure protruding from the surface of the base 18, or a stop block arranged on the base 18, and the like, which is not limited herein. By stopping the mounting substrate 13 at the preset position through the stop portion 19, the accuracy of the movement of the mounting substrate 13 can be further improved, thereby further improving the accuracy of the test data of the bezel 2.

[0064] In combination Figure 2 And Figure 4 In an embodiment, the stop portion 19 comprises a plate structure, the base 18 is provided with a limiting groove 181 corresponding to the position of the plate structure, the plate structure is fastened in the limiting groove 181 through screws, and the plate structure protrudes from the slot of the limiting groove 181. When the mounting substrate 13 abuts against the protruding part of the plate structure, the movement is stopped. With such a setting form, the stop portion 19 is simple to arrange, which is convenient for production and processing, and reduces the cost of the test fixture 1.

[0065] In combination Figure 2 And Figure 4In one embodiment, the length of the limiting groove 181 is greater than the length of the plate-shaped structure along the moving direction of the mounting substrate 13, so that the plate-shaped structure can move along the moving direction of the mounting substrate 13 in the limiting groove 181. At least one slide 191 is arranged on the plate-shaped structure, and the extending direction of the slide 191 is parallel to the moving direction of the mounting substrate 13. The screw cooperates with the plate-shaped structure to adjust the position of the preset position. When it is needed to adjust the position of the preset position, the screw is loosened, the plate-shaped structure is moved to the desired position along the moving direction of the mounting substrate 13, and then the screw is tightened, so as to adjust the position of the preset position. In this way, on the one hand, the flexibility of the test fixture 1 is improved. On the other hand, the way of adjusting the position of the preset position is simple and convenient, so as to improve the convenience of the test fixture 1, and reduce the cost of the test fixture 1.

[0066] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the features disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the disclosure being indicated by the following claims.

[0067] It should be understood that the present disclosure is not limited to the precise structures herein described and illustrated in the drawings, and that various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the claims that follow.

Claims

1. A test fixture for testing a crown of a wearable device, the test fixture comprising: The test fixture comprises: a mounting substrate; a first cylinder, a driving end of the first cylinder being fixedly connected with the mounting substrate, the first cylinder being used to drive the mounting substrate to move to a preset position; a clamping part, the clamping part comprising a clamping state and a release state, in the clamping state, the clamping part being capable of clamping the crown, in the release state, the clamping part being capable of releasing the clamped crown; a first driving assembly, the first driving assembly being arranged on the mounting substrate and being drivingly connected with the clamping part, the first driving assembly being used to drive the rotation of the clamping part; a second driving assembly, the second driving assembly being arranged on the mounting substrate, the second driving assembly being used to drive the clamping part to switch between the clamping state and the release state.

2. The test fixture of claim 1, wherein, The mounting substrate comprises a first surface and a second surface facing away from each other, the first driving assembly comprises: a driving motor, the driving motor being fixed on the first surface, and an output shaft of the driving motor extending from the first surface to the second surface; a connecting shaft, a first end of the connecting shaft being drivingly connected with the output shaft of the driving motor through a shaft coupling, a second end of the connecting shaft being fixedly connected with the clamping part.

3. The test fixture of claim 2, wherein, The second driving assembly comprises: a pressing assembly, the pressing assembly being arranged on the connecting shaft and being movable along the connecting shaft between a first position and a second position, in the first position, the clamping part being in the release state, in the second position, the pressing assembly making the clamping part in the clamping state; a second cylinder, the second cylinder being fixed on the second surface, a driving end of the second cylinder being connected with the pressing assembly, the second cylinder being used to drive the movement of the pressing assembly.

4. The test fixture of claim 3, wherein, The pressing assembly comprises: a sleeve, the sleeve being sleeved on the connecting shaft, in the second position, a first port of the sleeve being sleeved on the clamping part, so that the clamping part is in the clamping state; a push plate, the push plate being sleeved on the connecting shaft through a through hole and being located between a second port of the sleeve and the mounting substrate, and the push plate being connected with the driving end of the second cylinder; a resilient member, one end of the resilient member being fixed on the second port of the sleeve, the other end of the resilient member being fixed on the push plate.

5. The test fixture of claim 3, wherein, The second driving assembly further comprises: a fixing part, the fixing part being fixed on the second surface, the second cylinder being fixed on the fixing part.

6. The test fixture of any one of claims 2 to 5, wherein, The clamping part comprises a cylindrical structure with one end being open, and the cylindrical structure is a resilient member, the cylindrical structure comprising a first segment and a second segment connected with each other, one end of the first segment being connected with the second segment, the other end of the first segment being fixed on the second end of the connecting shaft, one end of the second segment being connected with the first segment, the other end of the second segment being open, the second segment being used to reach the clamping state by deformation.

7. The test fixture of claim 6, wherein, An inner surface of the second segment is provided with a plurality of grooves at intervals, the extending direction of the grooves being parallel to the axial direction of the cylindrical structure, and the plurality of grooves are used to make the second segment deform.

8. The test fixture of claim 7, wherein, The plurality of grooves are evenly distributed along the circumference of the second section, and the angle between the bottom wall of each groove and the line connecting the center of the cylindrical structure is 9-11 degrees.

9. The test fixture of claim 7, wherein, The wall thickness of the second section at the position corresponding to the bottom wall of each groove is 0.45-0.55 mm; and / or, The length of the inner cavity of the second section is greater than the outer diameter of the crown by 0.15-0.25 mm; and / or, The length of the inner cavity depth of the second section is greater than the thickness of the crown by 1.45-1.55 mm.

10. The test fixture of claim 6, wherein, The second section is a tapered structure, the diameter of the second section gradually increases from the first section to the open end of the second section, and the taper angle of the tapered structure is 25-35 degrees.

11. The test fixture of any one of claims 1 to 5, wherein, The test fixture further comprises: A base, wherein the first air cylinder is fixed to the base.

12. The test fixture of claim 11, wherein, The test fixture further comprises: A stopper provided on the base, which is used to stop the mounting substrate at the preset position.

13. The test fixture of claim 12, wherein, The stopper comprises a plate structure, the base is provided with a limiting groove at the position corresponding to the plate structure, the plate structure is fastened in the limiting groove by a screw, and the plate structure protrudes from the slot of the limiting groove.

14. The test fixture of claim 13, wherein, Along the moving direction of the mounting substrate, the length of the limiting groove is greater than the length of the plate structure, at least one slide is provided on the plate structure, the extension direction of the slide is parallel to the moving direction of the mounting substrate, and the screw cooperates with the plate structure to adjust the position of the preset position.

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