An assembling tool and method for a button assembly

Abstract

The application discloses an assembling tool and method for a button assembly. The assembling tool comprises a rack, a pressure head device, a positioning seat and a pressure holding device. The pressure holding device comprises a mounting seat, a top rod movably arranged on the mounting seat in a horizontal direction, and a pressure holding piece arranged at one end of the top rod. The pressure holding piece has a pressure holding surface facing the positioning seat. The profile of the pressure holding surface matches the outer side of the spring piece. The mounting seat is vertically arranged on the rack. When the spring piece is installed on the button core, the pressure holding piece of the pressure holding device can be abutted on the outer side of the spring piece. During the process of sleeving the button outer ring on the spring piece and the button core, the pressure holding piece can slide downward relative to the spring piece to keep the spring piece abutted on the button core, so that the spring piece is prevented from deviating or jumping out, and the assembling qualified rate and efficiency of the button assembly are improved.

Description

Technical Field

[0001] This invention relates to the field of ultrasonic scalpel assembly, and more particularly to an assembly fixture and assembly method for a button assembly. Background Technology

[0002] Ultrasonic scalpels have become a routine surgical instrument widely used for hemostatic separation and tissue coagulation of soft tissues in various surgeries. They typically consist of an ultrasonic scalpel handle and a blade. The ultrasonic scalpel handle contains a transducer, and the blade has at least a blade shank connected to the amplitude transformer shaft of the transducer.

[0003] To prevent excessive torque during the connection of the scalpel handle to the amplitude transformer shaft, which could damage the transducer, a method is employed in an ultrasonic scalpel, as disclosed in Chinese patent document CN 113349889 B. This method utilizes a knob assembly at the front of the handle. This assembly includes an inner knob ring, an outer knob ring, and two sets of spring clips positioned between the outer periphery of the inner knob ring and the inner periphery of the outer knob ring. This ensures that the torque value between the inner and outer knob rings is controlled within a set range, preventing excessive torque that could break the connecting screws, damage the transducer, or affect its normal performance. During assembly, the two sets of spring clips are first installed on the outer periphery of the inner knob ring, and then the outer knob ring is fitted onto the outer periphery of the spring clips. In the prior art, the assembly of this knob assembly is entirely manual, which is prone to spring clip misalignment or ejection, resulting in a very low product yield and is time-consuming and labor-intensive. Summary of the Invention

[0004] The purpose of this invention is to provide an assembly fixture for a button assembly to solve one or more problems of the prior art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] An assembly fixture for a button assembly, wherein the button assembly to be assembled includes a button core, a spring, and a button outer ring. The button core has a hollow cavity extending axially. The button outer ring is sleeved on the outer periphery of the button core. The spring is made of metal and is sandwiched between the outer periphery of the button core and the inner periphery of the button outer ring. The assembly fixture includes:

[0007] A frame, on which a support platform is mounted;

[0008] The pressure head device includes a lifting seat that is vertically movable on the frame, and a pressure head assembly disposed on the lifting seat, the pressure head assembly being configured to connect to the outer ring of the knob and drive the outer ring of the knob to move;

[0009] A positioning seat is fixedly disposed on the support platform, and the positioning seat has a positioning part that can be correspondingly inserted into the hollow cavity;

[0010] The pressing device includes a mounting base, a push rod movable in a horizontal direction on the mounting base, and a pressing member disposed at one end of the push rod. The pressing member has a pressing surface facing the positioning base, the contour of which matches the outer periphery of the spring piece. The mounting base is vertically movable on the frame.

[0011] In some embodiments, the height of the holding member is less than the height of the spring.

[0012] In some embodiments, the holding device is located on the movement path of the pressure head assembly, and the frame is provided with a first elastic element that provides the force required for the upward movement of the mounting base.

[0013] In some embodiments, the positioning base is at least partially or entirely made of magnetic material.

[0014] In some embodiments, the positioning seat includes a first positioning seat and a second positioning seat that are detachably disposed, the first positioning seat being fixedly disposed on the support platform, and the second positioning seat being capable of being inserted into the hollow cavity, wherein part or all of the second positioning seat is made of magnetic material.

[0015] In some embodiments, the first positioning seat includes a first column and a second column connected in the vertical direction. A positioning hole is provided on the support platform. The second column can be inserted into the positioning hole. The outer diameter of the first column is larger than the outer diameter of the second column. The first column protrudes above the platform surface of the support platform and constitutes the positioning part.

[0016] In some embodiments, the second positioning seat includes a third column and a fourth column connected in a vertical direction, the outer diameter of the third column matching the inner diameter of the hollow cavity, and the outer diameter of the fourth column being smaller than the diameter of the third column, wherein the second positioning seat is made entirely of magnetic material.

[0017] In some embodiments, the pressure head assembly includes at least a positioning post extending in a vertical direction, the lower part of the positioning post having a cavity, and the outer diameter of the fourth post matching the inner diameter of the cavity, so that when the positioning post moves downward, the fourth post can be correspondingly inserted into the cavity.

[0018] In some embodiments, there are two sets of pressing devices, and the two pressing surfaces in the two sets of pressing devices are arranged opposite to each other; the length directions of the two top rods in the two sets of pressing devices are parallel or collinear.

[0019] In some embodiments, the pressing device further includes a second elastic element that allows the push rod to move along its own length direction, causing the pressing member to move away from the positioning seat, wherein the other end of the push rod is provided with a pressing operation part, and the second elastic element is sleeved on the push rod and located between the mounting seat and the pressing operation part.

[0020] In some embodiments, the pressure head assembly includes at least an outer ring positioning block, the outer ring positioning block having a snap-fit ​​structure for engaging with the outer periphery of the button outer ring, and the outer ring positioning block having a push surface, wherein when the button outer ring is snapped onto the outer ring positioning block by the snap-fit ​​structure, the push surface abuts against the button outer ring from below.

[0021] In some embodiments, the outer ring positioning block has a hollow channel extending vertically, and the pressure head assembly further includes:

[0022] A positioning post extends vertically and passes through the hollow channel axially, with its upper end fixedly connected to the outer ring positioning block.

[0023] A guide sleeve, which is slidably fitted onto the positioning post;

[0024] The third elastic element is disposed on the positioning post and provides the force required for the guide sleeve to move downward;

[0025] The hollow cavity of the button core has multiple axially extending positioning grooves on its circumferential cavity wall, and multiple positioning protrusions on its outer periphery. When the guide sleeve is inserted into the hollow cavity along the axial direction, the multiple positioning protrusions and the multiple positioning grooves are connected in a one-to-one correspondence.

[0026] In some embodiments, the guide sleeve is slidably mounted on the positioning post by a positioning pin, the axis of the positioning pin is perpendicular to the axis of the guide sleeve, and the positioning post is provided with a limiting groove to provide sliding guidance and limiting of the positioning pin.

[0027] Another object of the present invention is to provide a method for assembling a button assembly, the technical solution of which is:

[0028] An assembly method for a button assembly, implemented based on the above-mentioned assembly fixture, the assembly method comprising the following steps:

[0029] (1) Install the outer ring of the button to the bottom of the pressure head assembly;

[0030] (2) Install the spring piece onto the button core, and set the button core on the support platform through the positioning seat;

[0031] (3) Make the spring piece correspond to the pressing surface of the pressing member, and push the push rod so that the pressing surface abuts against the outside of the spring piece;

[0032] (4) Drive the pressure head assembly downward until the outer ring of the button is completely fitted onto the outer periphery of the spring, so that the pressure holding member moves away from the spring.

[0033] (5) Continue to drive the pressure head assembly downward until the outer ring of the button is assembled to the preset position on the button core, and the assembly is completed.

[0034] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: When the assembly tooling of the present invention is used to assemble the button assembly, after the spring is installed on the button core, the pressing member in the pressing device can abut against the outer periphery of the spring, and during the process of the outer ring of the button being sleeved onto the spring and the button core, the pressing member can slide downward relative to the spring and keep the spring pressed against the button core, avoiding the spring from deviating or popping out, thereby improving the assembly qualification rate and assembly efficiency of the button assembly. Attached Figure Description

[0035] Appendix Figure 1 This is an exploded view of the structure of the button assembly to be assembled in the assembly tooling according to an embodiment of the present invention;

[0036] Appendix Figure 2 For the appendix Figure 1 A front view structural diagram of the button assembly;

[0037] Appendix Figure 3 This is an exploded view of the overall structure of an assembly tooling according to an embodiment of the present invention;

[0038] Appendix Figure 4 For the appendix Figure 3 A front view structural diagram of the assembly tooling;

[0039] Appendix Figure 5 For the appendix Figure 3 A schematic diagram of the pressure head assembly in the assembly tooling;

[0040] Appendix Figure 6 For the appendix Figure 5 A half-sectional schematic diagram of the pressure head assembly;

[0041] Appendix Figure 7 For the appendix Figure 5 A longitudinal sectional view of the pressure head assembly;

[0042] Appendix Figure 8 For the appendix Figure 3 A schematic diagram of the overall structure of the assembly tooling during the assembly of the button assembly;

[0043] Appendix Figure 9 For the appendix Figure 8 The front view;

[0044] Appendix Figure 10 For the appendix Figure 9 A longitudinal section diagram;

[0045] Appendix Figure 11 For the appendix Figure 10 Enlarged schematic diagram of the middle P section;

[0046] Among them: 10, outer ring of the button; 20, button core; 201, mounting groove; 202, positioning groove; 30, spring piece;

[0047] 1. Frame; 11. Support platform; 110. Positioning hole; 12. Guide seat; 13. Guide column; 14. Spring;

[0048] 2. Press head device; 21. Lifting seat; 22. Outer ring positioning block; 221. Protruding post; 222. Slot; 223. Pushing surface; 23. Guide sleeve; 231. Positioning protrusion; 24. Positioning pin; 241. Limiting groove; 242. Limiting ring; 243. Cavity; 25. Connecting screw; 26. Third elastic element; 27. Positioning pin;

[0049] 3. Pressing device; 31. Push rod; 311. Pressing operation part; 32. Pressing component; 321. Pressing surface; 33. Second elastic component; 34. Mounting base; 35. First elastic component;

[0050] 4. Positioning seat; 41. First positioning seat; 411. First column; 412. Second column; 42. Second positioning seat; 421. Third column; 422. Fourth column;

[0051] 5. Operating the handle. Detailed Implementation

[0052] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. Obviously, the embodiments described in this application are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0053] See Figure 1 , Figure 2The diagram shows a button assembly to be assembled in one embodiment, comprising a button outer ring 10, a button core 20, and a spring piece 30. The button core 20 is generally cylindrical and has a hollow cavity extending axially. Multiple axially extending positioning grooves (not shown) are provided in the circumferential wall of the hollow cavity. An mounting groove 201 is provided on the outer periphery of the button core 20 for mounting the spring piece 30. The spring piece 30 is made of metal and there are two sets of spring pieces 30. The main body of the spring piece 30 is arc-shaped, and both ends have bent structures. The button outer ring 10 has a through hole extending axially and is also provided with a structure for engaging with the spring piece 30. The spring piece 30 is installed in the mounting groove 201 and surrounds the outer periphery of the button core 20. The button outer ring 10 is sleeved on the outside of the button core 20 and the spring piece 30, and the spring piece 30 is sandwiched between the outer periphery of the button core 20 and the inner periphery of the button outer ring 10.

[0054] See Figures 3 to 11 The assembly fixture for the button assembly shown includes:

[0055] The frame 1 is equipped with a support platform 11, which is mainly used to place the button core 20.

[0056] The pressure head device 2 includes a lifting seat 21 that is vertically movable on the frame 1, and a pressure head assembly on the lifting seat 21. The pressure head assembly is configured to connect to the button outer ring 10 and drive the button outer ring 10 to move, specifically, it can move up and down with the lifting seat 21 as the button outer ring 10 moves.

[0057] Positioning seat 4 is fixedly mounted on support platform 11 and has a positioning part that can be inserted into the hollow cavity of button core 20 to position button core 20 on support platform 11.

[0058] The pressing device 3 includes a mounting base 34, a push rod 31 movable in the horizontal direction on the mounting base 34, and a pressing member 32 disposed at one end of the push rod 31. The pressing member 32 has a pressing surface 321 facing the positioning seat 4. The contour of the pressing surface 321 matches the outer periphery of the spring 30. The height of the pressing member 32 is less than the height of the spring 30. The mounting base 34 is vertically movable on the frame 1. The mounting base 34 can abut against the outer circumferential surface of the spring 30. During the assembly process, after the outer ring 10 of the button is fitted onto the outer side of a portion of the spring 30, the mounting base 34 can move downward relative to the frame 1, so that the pressing member 32 slides down along the spring 30, thereby keeping the pressing surface 321 abutting against the spring 30 until the outer ring 10 of the button is completely fitted onto the outer side of the spring 30. In this way, it can be ensured that the spring 30 will not deviate or pop out during the assembly process, thereby improving the assembly qualification rate.

[0059] See Figures 3 to 11 As shown, in this embodiment, the assembly fixture is configured as follows:

[0060] In this embodiment, the positioning base 4 is at least partially or entirely made of magnetic material. Thus, when the spring piece 30 is assembled to the outer periphery of the button core 20 and the button core 20 is placed on the positioning base 4, the spring piece 30 can be kept fixed on the mounting groove 201 on the outer periphery of the button core 20 under the elastic adsorption force generated by the magnetic material on the positioning base 4. In this way, during the assembly process, the operator does not need to manually hold the spring piece 30 to keep it in the mounting groove 201, which makes it easier for the operator to operate the assembly tool with both hands. At the same time, it further improves the accuracy of the assembly process and reduces manual error.

[0061] Specifically, the positioning seat 4 includes a first positioning seat 41 and a second positioning seat 42 that are detachably disposed. The first positioning seat 41 is fixedly disposed on the support platform 11, and the second positioning seat 42 can be inserted into the hollow cavity of the button core 20. The second positioning seat 42 is partially or entirely made of magnetic material. In this way, when the operator performs the assembly operation, he / she can first insert the second positioning seat 42 into the hollow cavity of the button core 20, then install the spring piece 30, and then place the entire button core 20 on the first positioning seat 41, thereby positioning the button core 20 with the spring piece 30 on the support platform 11, which is more convenient to operate.

[0062] See Figure 10 , Figure 11 As shown, the first positioning seat 41 includes a first column 411 and a second column 412 connected in the vertical direction. The support platform 11 is provided with a positioning hole 110. The second column 412 can be inserted into the positioning hole 110. The outer diameter of the first column 411 is larger than the outer diameter of the second column 412. The first column 411 protrudes above the platform surface of the support platform 11 and constitutes the positioning part of the positioning seat. It can be inserted into the hollow cavity of the button core 20 to realize the positioning and installation of the button core 20 on the support platform 11.

[0063] The second positioning seat 42 includes a third column 421 and a fourth column 422 connected vertically. The outer diameter of the third column 421 matches the inner diameter of the hollow cavity in the button core 20, and the outer diameter of the fourth column 422 is smaller than the diameter of the third column 421. The second positioning seat 42 is entirely made of magnetic material. In other embodiments, a magnetic component may be fixedly disposed on the upper part of the fourth column 422 to attract the spring piece 30.

[0064] During assembly, the pressing device 3 is driven to move downward, causing the pressing member 32 to slide relative to the spring piece 30. The frame 1 is provided with a first elastic member 35 that provides the force required for the mounting seat 34 to move upward. In this embodiment, the pressing device 3 is located on the movement path of the pressing head device 2. During the downward movement of the pressing head device 2, a component on the pressing head device 2 can abut against the component of the pressing device 3, thereby pushing the pressing device 3 as a whole to move downward automatically, thus causing the pressing member 32 to move downward. Specifically, the pressing member 32 is set on the movement path of the pressing head assembly. During the downward movement of the pressing head device 2, the pressing member 32 is pushed downward, causing the pressing device 3 as a whole to move downward. In this way, after a portion of the spring piece 30 is fitted onto the outer ring 10 during assembly, the pressing device 3 maintains the pressing of the spring piece 30 and moves downward as a whole, which can minimize the misalignment of the spring piece 30.

[0065] In this embodiment, two sets of pressing devices 3 are provided to press two sets of spring pieces 30 respectively. The two pressing surfaces 321 in the two sets of pressing devices 3 are arranged opposite to each other, and the length directions of the two push rods 31 in the two sets of pressing devices are parallel or collinear.

[0066] The holding device 3 also includes a second elastic element 33 that allows the push rod 31 to move along its own length direction, causing the holding member 32 to move away from the positioning seat 4. The other end of the push rod 31 is provided with a pressing operation part 311. The second elastic element 33 is a spring sleeved on the push rod 31 and located between the mounting seat 34 and the pressing operation part 311. When no external force is applied, under the action of the second elastic element 33, there is a large gap between the holding members 32 on both sides and the positioning seat 4. After the button core 20 and the spring piece 30 are assembled onto the positioning seat 4, there is still a certain gap between the holding member 32 and the spring piece 30. At this time, simply pressing the pressing operation parts 311 on both sides causes the two push rods 31 to move towards each other, allowing the holding members 32 on both sides to correspondingly abut against the outer periphery of the two sets of spring pieces 30, thereby pressing the spring pieces 30 and keeping them fixed on the button core 20. When it is no longer necessary to hold the spring 30, the operator releases the pressure on the two sides of the pressing operation part 311. Under the action of the second elastic element 33, or with the assistance of manual operation, the push rod 31 moves away from the positioning seat 4, thereby causing the holding member 32 to reset and disengage from the button core 20 or the spring 30.

[0067] In specific design, the size of the pressing operation part 311 is larger than that of the spring 30, which makes it easier to operate compared to manually pressing the spring 30 during traditional assembly. At the same time, the holding part 32 cooperates with the main body of the spring 30, which can make the spring 30 fit well against the button core 20 in the circumferential direction. The holding area is larger, and the spring 30 is less likely to be deformed during assembly.

[0068] In the pressure head device 2, the upper part of the lifting seat 21 is connected to a drive mechanism, which includes an operating handle 5. By rotating the operating handle 5, the lifting seat 21 can be driven to move upward or downward. The frame 1 is provided with multiple guide columns 13, specifically two in this case, each fitted with a spring 14. The guide columns 13 are slidably connected to the lifting seat 21 or to the frame 1. When no external force is applied, the lifting seat 21 is held at a relatively high height by the action of the spring 14. When the operating handle 5 is rotated to drive the lifting seat 21 downward, the spring 14 is compressed, and the lifting seat 21 and the pressure head assembly mounted on it move downward together. When the operating handle 5 is released, the lifting seat 21 and the pressure head assembly move upward and return to their original position by the action of the spring 14.

[0069] See Figures 6 to 8 As shown, the pressure head assembly includes at least an outer ring positioning block 22, and the frame 1 is also provided with a guide seat 12 to provide sliding guidance for the outer ring positioning block 22. The guide seat 12 has a guide hole through which the outer ring positioning block 22 slides in the up and down direction.

[0070] The outer ring positioning block 22 has a snap-fit ​​structure for engaging with the outer periphery of the button outer ring 10. The outer ring positioning block 22 has a push-up surface 223. When the button outer ring 10 is snapped onto the outer ring positioning block 22 by the snap-fit ​​structure, the push-up surface 223 abuts against the button outer ring 10 downwards. Here, the snap-fit ​​structure on the outer ring positioning block 22 is specifically designed according to the external shape of the button outer ring 10. Specifically, it includes multiple protrusions 221 and slots 222 that are spaced apart from each other along the circumference. A slot 222 is formed between two adjacent protrusions 221, and an installation cavity is formed between the protrusions 221. The main body of the button outer ring 10 can be accommodated in the installation cavity, and the knob part on its outer periphery can be correspondingly snapped into each slot 222 to achieve snap-fit ​​of the button outer ring 10. After the button outer ring 10 is assembled onto the button core 20 and fixed to the button core 20, when the pressure head assembly is driven upward, the outer ring positioning block 22 will automatically disengage from the button outer ring 10.

[0071] The outer ring positioning block 22 has a hollow channel running vertically through it. The pressure head assembly also includes a positioning post 24, a guide sleeve 23, and a third elastic element 26. The positioning post 24 extends vertically and passes through the hollow channel of the outer ring positioning block 22 axially. The upper end of the positioning post 24 is fixedly connected to the upper end of the outer ring positioning block 22 by a connecting screw 25. The guide sleeve 23 is slidably fitted onto the positioning post 24. The third elastic element 26 is disposed on the positioning post 24 and provides the force required for the guide sleeve 23 to move downward. A limit ring 242 is provided at the lower end of the positioning post 24 to restrict the guide sleeve 23 to the limiting positioning post 24. The third elastic element 26 is a spring, which is fitted onto the positioning post 24 and abuts against the outer ring positioning block 22 and the guide sleeve 23. The guide sleeve 23 is slidably mounted on the positioning post 24 via the positioning pin 27. The axis of the positioning pin 27 is perpendicular to the axis of the guide sleeve 23. The positioning post 24 is provided with a limiting groove 241 to guide and limit the sliding of the positioning pin 27, thereby limiting the sliding range of the guide sleeve 23 on the positioning post 24. During the downward movement of the pressure head assembly, the downward stroke of the guide sleeve 23 may not be consistent with the downward stroke of the outer ring positioning block 22, so as to meet the corresponding fit requirements of the various parts of the outer ring 10 and the various structures on the button core 20 when the outer ring 10 is assembled onto the button core 20.

[0072] Multiple positioning protrusions 231 are spaced apart on the outer periphery of the guide sleeve 23. When the guide sleeve 23 is inserted axially into the hollow cavity of the button core 20, the multiple positioning protrusions 231 correspond one-to-one with the multiple positioning grooves 202 in the hollow cavity of the button core 20. Since the position of the guide sleeve 23 relative to the positioning post 24 in the circumferential direction is fixed, and its position relative to the outer ring positioning block 22 and the outer ring 10 of the button is also fixed, when the positioning protrusions 231 cooperate with the multiple positioning grooves 202 on the button core 20, the outer ring 10 of the button and the button core 20 can be correspondingly matched in the circumferential direction, achieving accurate alignment and installation.

[0073] The positioning post 24 is hollow, with a cavity 243 at its lower part. The outer diameter of the fourth post 422 of the second positioning seat 42 on the positioning seat 4 matches the inner diameter of the cavity 243. During the downward movement of the positioning post 24, the fourth post 422 can be inserted into the cavity 243 of the positioning post 24. This structure can make way for the downward movement of the positioning post 24 and can also provide guidance for the downward movement of the pressure head assembly.

[0074] When using the assembly fixture of this embodiment to assemble the button assembly, the specific steps are as follows:

[0075] (1) First install the outer ring 10 of the button to the bottom of the pressure head assembly of the pressure head device 2;

[0076] (2) Install the spring piece 30 into the mounting groove 201 of the button core 20, and set the button core 20 on the support platform 11 through the positioning seat 4. Specifically, in this step, the second positioning seat 42 can be inserted into the hollow cavity of the button core 20 first, and then the two sets of spring pieces 30 can be installed onto the button core 20 respectively; then the button core 20 and the second positioning seat 42 can be installed together onto the first positioning seat 41, so that the first column 411 on the upper part of the first positioning seat 41 is inserted into the hollow cavity of the button core 20, thus completing the positioning and installation of the button core 20 on the support platform 11;

[0077] (3) Adjust the position of the knob core 20 so that the arc-shaped main body of the two sets of spring pieces 30 corresponds to the pressing surface 321 of the pressing member 32 on both sides. Then, push the push rods 31 on both sides so that the pressing member 32 on both sides moves towards each other, so that the pressing surface 321 of the two pressing members 32 abuts against the outer side of the corresponding spring piece 30 and is located in the middle position of the spring piece 30, maintaining the push against the push rods 31 on both sides.

[0078] (4) Turn the operating handle 5 to drive the pressure head device 2 to move downward. The lifting seat 21 and the pressure head assembly move downward with the button outer ring 10. The button outer ring 10 is first fitted onto the upper part of the button core 20. As the pressure head device 2 moves downward, the button outer ring 10 is fitted onto the upper part of the spring piece 30.

[0079] The pressure head device 2 continues to descend, pushing the entire pressure holding device 3 downward. The pressure holding member 32 moves downward, and the pressure holding surface 321 slides down along the outer side of the spring piece 30, keeping it against the spring piece 30 to prevent the spring piece 30 from deviating or popping out.

[0080] After the outer ring 10 of the button is completely fitted onto the outer periphery of the spring piece 30, release the pressure on the two push rods 31. If necessary, pull the push rods 31 on both sides outward so that the pressing member 32 moves outward and away from the spring piece 30.

[0081] (5) Continue to drive the pressure head device 2 downward until the outer ring 10 of the button is assembled to the preset position on the button core 20. The assembly is completed and the spring piece 30 is clamped between the outer ring 10 of the button and the button core 20.

[0082] (6) Release the operating handle 5, the pressure head device 2 returns to its original position, and the outer ring 10 of the button disengages from the pressure head assembly. At this point, the assembled button assembly can be removed.

[0083] In summary, by using the assembly fixture of the button assembly of the present invention to install the above-mentioned button assembly, it is possible to ensure the correct installation of the spring piece 30 between the button core 20 and the outer ring 10 of the button, reduce the operational requirements for operators, and improve the assembly qualification rate and assembly efficiency of the button assembly.

[0084] It should be stated that the above descriptions of directions such as front, back, left, right, up, and down are all defined with reference to the directions observed by the operator when using the assembly tool to assemble the button assembly. The above definitions of directions are only for the convenience of describing the present invention and simplifying the description, and are not intended to 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 the present invention.

[0085] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An assembly fixture for a button assembly, the button assembly to be assembled comprising a button core, a spring, and a button outer ring, wherein the button core has a hollow cavity extending axially, the button outer ring is sleeved on the outer periphery of the button core, the spring is made of metal and is sandwiched between the outer periphery of the button core and the inner periphery of the button outer ring, characterized in that, The assembly fixture includes: A frame, on which a support platform is mounted; The pressure head device includes a lifting seat that is vertically movable on the frame, and a pressure head assembly disposed on the lifting seat, the pressure head assembly being configured to connect to the outer ring of the knob and drive the outer ring of the knob to move; A positioning seat is fixedly disposed on the support platform, and the positioning seat has a positioning part that can be inserted into the hollow cavity in a corresponding manner. The pressing device includes a mounting base, a push rod movable in a horizontal direction on the mounting base, and a pressing member disposed at one end of the push rod. The pressing member has a pressing surface facing the positioning seat, the contour of which matches the outer periphery of the spring piece. The mounting base is vertically movable on the frame. The pressure head assembly includes: The outer ring positioning block has a snap-fit ​​structure for engaging with the outer periphery of the button outer ring, and the outer ring positioning block has a push-up surface and a hollow channel extending in the vertical direction. When the button outer ring is snapped onto the outer ring positioning block by the snap-fit ​​structure, the push-up surface abuts against the button outer ring from the bottom. A positioning post extends vertically and passes through the hollow channel axially, with its upper end fixedly connected to the outer ring positioning block. A guide sleeve, which is slidably fitted onto the positioning post; The third elastic element is disposed on the positioning post and provides the force required for the guide sleeve to move downward; The hollow cavity of the button core has multiple axially extending positioning grooves on its circumferential cavity wall, and multiple positioning protrusions on its outer periphery. When the guide sleeve is inserted into the hollow cavity along the axial direction, the multiple positioning protrusions and the multiple positioning grooves are connected in a one-to-one correspondence.

2. The assembly fixture according to claim 1, characterized in that: The pressing device is located on the movement path of the pressing head assembly, and the frame is provided with a first elastic element that provides the force required for the mounting seat to move upward.

3. The assembly fixture according to claim 1, characterized in that: The positioning seat includes a first positioning seat and a second positioning seat that can be detachably disposed. The first positioning seat is fixedly disposed on the support platform, and the second positioning seat can be inserted into the hollow cavity. The second positioning seat is partially or entirely made of magnetic material.

4. The assembly fixture according to claim 3, characterized in that: The first positioning seat includes a first column and a second column connected in the vertical direction. A positioning hole is provided on the support platform. The second column can be inserted into the positioning hole. The outer diameter of the first column is larger than the outer diameter of the second column. The first column protrudes above the platform surface of the support platform and constitutes the positioning part.

5. The assembly fixture according to claim 3, characterized in that: The second positioning seat includes a third column and a fourth column connected in the vertical direction. The outer diameter of the third column matches the inner diameter of the hollow cavity, and the outer diameter of the fourth column is smaller than the diameter of the third column. The second positioning seat is made entirely of magnetic material.

6. The assembly fixture according to claim 5, characterized in that: The pressure head assembly includes at least a positioning post extending in the vertical direction, the lower part of the positioning post having a cavity, and the outer diameter of the fourth post matching the inner diameter of the cavity.

7. The assembly fixture according to claim 1, characterized in that: The pressing device has two sets, and the two pressing surfaces in the two sets of pressing devices are arranged opposite to each other; the length directions of the two top rods in the two sets of pressing devices are parallel or collinear.

8. The assembly fixture according to claim 7, characterized in that: The holding device further includes a second elastic element that allows the push rod to move along its own length direction so that the holding member moves away from the positioning seat. The other end of the push rod is provided with a pressing operation part, and the second elastic element is sleeved on the push rod and located between the mounting seat and the pressing operation part.

9. The assembly fixture according to claim 1, characterized in that: The height of the pressure member is less than the height of the spring.

10. The assembly fixture according to claim 1, characterized in that: The guide sleeve is slidably mounted on the positioning post via a positioning pin. The axis of the positioning pin is perpendicular to the axis of the guide sleeve. The positioning post is provided with a limiting groove to provide sliding guidance and limit the positioning pin.

11. A method for assembling a button assembly, characterized in that: Based on the assembly fixture according to any one of claims 1 to 10, the assembly method includes the following steps: (1) Install the outer ring of the button to the bottom of the pressure head assembly; (2) Install the spring piece onto the button core, and set the button core on the support platform through the positioning seat; (3) Make the spring piece correspond to the pressing surface of the pressing member, and push the push rod so that the pressing surface abuts against the outside of the spring piece; (4) Drive the pressure head assembly downward until the outer ring of the button is completely fitted onto the outer periphery of the spring, so that the pressure holding member moves away from the spring; (5) Continue to drive the pressure head assembly downward until the outer ring of the button is assembled to the preset position on the button core, and the assembly is completed.

Images