Movement assembling device of electric toothbrush
By designing an electric toothbrush movement assembly device, the synergy between the push mechanism and the inner pressure claws is solved, and the assembly efficiency and product quality are improved.
Patent Information
- Application Number
- CN202421639991.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The assembly between the movement of the electric toothbrush and the handle shell is time-consuming and labor-intensive, inefficient, and can easily lead to poor assembly, including deformation of the handle shell, spray-painted cracks, snap-on deformation or breakage, affecting the firmness of subsequent installation.
An electric toothbrush movement assembly device is designed. The push mechanism uses the synergistic effect of the inner pressing claw and pushing column to achieve accurate pushing of the movement and the gap matching between the snaps, reduce assembly resistance, and ensure the firm connection between the snaps and the snaps.
It improves the assembly efficiency of the electric toothbrush movement and the handle shell, reduces the time and effort of manual assembly, avoids poor assembly, and ensures the quality and reliability of the product.
Smart Images
Figure CN222791903U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric toothbrush production, in particular to a core assembly device of an electric toothbrush. Background Art
[0002] The movement and handle shell of the electric toothbrush are generally assembled with snaps, refer to Figure 7 A pair of buckles are provided at the rear end of the movement, and a pair of buckle grooves corresponding to the buckles are provided at the rear end of the handle shell. During the design process, in order to ensure the waterproof sealing of the silicone at the motor shaft at the top of the movement, the size of the buckle needs to have a strong interference, that is, the distance between the pair of buckles is larger than the opening size of the handle shell. During manual assembly, the movement needs to be pressed into the handle shell through the guide column, and the internal snap-fit between the buckle and the buckle groove is realized. Due to the large interference of the buckle, the interference setting of the buckle makes the buckle at the rear of the movement squeeze the handle shell when passing through the end of the handle shell. Manual assembly needs to overcome the resistance to squeezing the inner wall of the handle shell caused by the interference of the buckle. Therefore, manual assembly is time-consuming and labor-intensive, and inefficient. In addition, it is easy to cause deformation of the handle shell or cracking of the spray paint on the surface of the handle shell during the insertion process, and it may even cause deformation and breakage of the buckle, so that when the handle bottom shell is installed later, the snap connection between the handle bottom shell is not firm enough. The above factors will cause product defects after assembly between the movement and the handle shell of the electric toothbrush. Utility Model Content
[0003] The utility model provides an electric toothbrush core assembly device for solving the problem that the assembly between the core and the handle shell of the electric toothbrush is time-consuming, labor-intensive, inefficient, and easily causes defective products after assembly.
[0004] The technical solution provided by the utility model is as follows: an electric toothbrush movement assembly device comprises a bottom plate, one side of the bottom plate is provided with a fixing seat, the fixing seat is provided with a fixing groove, the outer side of the fixing seat is provided with a positioning seat, the handle shell is abutted against the positioning seat for positioning and is fixed by the fixing groove, the bottom plate is provided with a pushing mechanism on the side away from the positioning seat, the pushing mechanism comprises a front pushing structure and a rear pushing structure, the front pushing structure comprises a front pushing plate and a pair of inner pressing claws, the front pushing plate is provided with a through pushing hole, both sides of the pushing hole are provided with limiting columns, the inner pressing claws are arranged relatively up and down and are fixed in the pushing holes, the inner pressing claws extend in a direction toward one side of the fixing seat and protrude from the front end of the front pushing plate, the front end of the inner pressing claws is provided with a guiding end with an inclined surface, the rear pushing structure comprises a rear pushing plate, the rear pushing plate is provided with a pushing column, the pushing column extends through the pushing hole between the front pushing plate and the inner pressing claw, and the front pushing plate and the rear pushing plate are adjusted by The rear push plate drives the push column to move forward relative to the inner pressure claw, and the push column pushes the movement to make the buckle reach the buckle groove position, and makes the buckle disengage from the inner pressure claw, so that the buckle is engaged in the buckle groove.
[0005] Furthermore, a clearance groove is provided on the positioning seat, and the central axis of the clearance groove coincides with the central axis of the fixing groove. During the assembly of the movement, the motor shaft at the front end of the movement passes through the handle housing and avoids through the clearance groove.
[0006] Furthermore, the fixing seat is provided with a hand groove, and the hand groove and the fixing groove are vertically staggered. After the fixing seat is provided with the hand groove, it is more convenient to position the handle shell for loading or remove the product after the handle shell is assembled with the movement.
[0007] Furthermore, the push column is provided with a pair of push grooves for limiting the inner pressure claws along its axial direction. Then, when the push column moves toward the bottom of the movement, the push column is further limited by the inner pressure claws, so that the push column pushes the movement more accurately.
[0008] Furthermore, the front push plate has a pair of side holes at its rear end for fixing the limit posts, and the limit posts are fixed by fixing screws or fixing bolts arranged in the side holes.
[0009] Furthermore, the rear push plate is provided with a limit sliding column, and the limit sliding column is movably sleeved inside the side hole. The side hole used to fix the limit column, after the limit column is fixed by a fixing screw or a fixing bolt, the fixing screw or the fixing bolt is deeply buried inside the side hole, and the side hole also has a long internal space. Therefore, the side hole in the internal space can be used as a sliding space for the limit sliding column of the rear push plate. Then, when the rear push plate moves toward the front push plate, the positioning sliding of the limit sliding column further ensures that the push column on the rear push plate can be pushed along the axis direction of the electric toothbrush, ensuring that the push column can better accurately push the movement. At the same time, the limit The positioning sliding column can also realize the sliding limit of the rear push plate. Since the rear push plate is pushed toward the front push plate, when the positioning sliding column is pressed against the inside of the side hole, the positioning sliding column can further limit the pushing stroke of the rear push plate. Therefore, through the positioning sliding column, not only can the rear push plate be pushed accurately, but also the pushing stroke of the rear push plate can be limited, so that the push column pushes the movement for the second time according to the limiting distance of the positioning sliding column, thereby realizing the purpose of disengaging the buckle of the movement and the internal pressure claw, and then accurately realizing the purpose of engaging the buckle of the movement with the buckle groove.
[0010] Furthermore, the back side of the front push plate is provided with a plurality of spring slots corresponding to the springs. Further, the positioning of the springs through the spring slots enables the springs to more stably realize the elastic connection between the front push plate and the rear push plate.
[0011] Furthermore, a manual control valve for controlling the push cylinder is provided on the bottom plate. The push cylinder realizes two pushes of the push mechanism through the manual control valve.
[0012] In the utility model, the movement is pre-plugged and assembled on the handle shell, and the buckle of the movement is left at a certain distance outside the handle shell. The pre-assembled electric toothbrush is positioned and fixed by the positioning seat and the fixing seat. The pushing mechanism is pushed by the pushing cylinder. After the buckle is fully plugged and matched through the guidance of the inner pressure claw, the corresponding push column is pressed against the end of the movement. The buckle is elastically relatively compressed under the action of the inner pressure claw. After the buckle is compressed, the distance between the buckles becomes smaller and is smaller than the distance between the inner grooves of the handle shell, so that the movement can be guaranteed to change from the original interference fit to a clearance fit when it is plugged into the handle shell. When the inner pressure claw is engaged with the buckle, the push column is synchronously pressed against the end of the movement. The pushing mechanism is pushed under the action of the pushing cylinder. The column and the inner pressure claw move synchronously and send the movement into the handle housing. During the movement, when the pushing mechanism moves to the point where the limit column abuts against the fixed seat, the abutment of the limit column makes the resistance to the movement of the front push plate large, and the pushing cylinder cannot continue to push the front push plate forward, and the front push plate stops moving. However, as the pushing cylinder continues to push the pushing mechanism, the pushing cylinder acts on the rear push plate, so that the rear push plate overcomes the supporting force of the spring, so that the rear push plate continues to move toward the front push plate, and the rear push plate drives the push column to move forward relative to the inner pressure claw, and the push column pushes the movement so that the buckle reaches the buckle groove position and disengages the buckle from the inner pressure claw, so that the buckle is snap-fitted in the buckle groove, completing the assembly process of the movement in the handle housing.
[0013] The utility model adopts a two-step pushing method to realize the push-and-clip fit of the movement in the handle housing with clearance fit, thereby ensuring the rapid and lossless plug-in assembly of the movement in the handle housing. The pushing mechanism is cleverly designed, which greatly improves the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.
[0015] Figure 2 It is a schematic diagram of the implementation of the utility model.
[0016] Figure 3 It is a three-dimensional schematic diagram of the pushing mechanism.
[0017] Figure 4 It is a schematic diagram of the three-dimensional decomposition structure of the pushing mechanism.
[0018] Figure 5 This is a schematic diagram of the reverse three-dimensional structure of the forward-pushing structure from the rear view.
[0019] Figure 6 Schematic diagram of the internal cross section when assembling the movement for the push mechanism.
[0020] Figure 7 It is a schematic diagram of the structure of the movement and handle of an electric toothbrush.
[0021] Among them: 1-bottom plate, 2-positioning seat, 21-giving groove, 3-fixed seat, 31-fixed groove, 32-hand groove, 4-forward push structure, 41-forward push plate, 411-push hole, 412-spring groove, 413-side hole, 42-inner pressure claw, 421-guide end, 43-limit column, 44-latch, 5-backward push structure, 51-backward push plate, 52-push column, 521-push groove, 53-spring, 54-limit sliding column, 55-adjusting screw, 6-push cylinder, 7-manual control valve, 8-electric toothbrush, 81-handle shell, 82-movement, 83-buckle, 84-buckle groove. DETAILED DESCRIPTION
[0022] The following is a brief description of the implementation of the present utility model in conjunction with the accompanying drawings.
[0023] Commonly used electric toothbrush 8, refer to Figure 7 , including a handle shell 81 and a movement 82. A pair of buckles 83 are provided at the rear end of the movement 82, and a pair of buckle grooves 84 corresponding to the buckles 83 are provided at the rear end of the handle shell 81. During assembly, the pair of buckles 83 on the movement 82 need to be inserted into the positions of the buckle grooves 84 through the ends of the handle shell 81, so that the buckles 83 are snapped into the buckle grooves 84, thereby realizing the assembly of the movement 82 in the handle shell 81.
[0024] A movement assembly device for an electric toothbrush, referring to 1- Figure 2 , including a base plate 1, a fixing seat 3 is provided on one side of the base plate 1, and a fixing groove 31 is provided on the fixing seat 3. A positioning seat 2 is provided on the outer side of the fixing seat 3. The handle shell 81 is positioned against the positioning seat 2 and fixed by the fixing groove 31. In order to facilitate the fixing operation of the handle shell 81 on the fixing seat 3 or to facilitate removal from the fixing seat 3 after the product is assembled, a hand groove 32 is provided on the fixing seat 3. The hand groove 32 and the fixing groove 31 are vertically staggered. A clearance groove 21 is provided on the positioning seat 2. The central axis of the clearance groove 21 coincides with the central axis of the fixing groove 31. During the assembly process of the movement 82, the motor shaft at the front end of the movement 82 passes through the handle shell 81 and is avoided by the clearance groove 21. The clearance groove 21 can realize the positioning and placement of the extended motor shaft.
[0025] Reference Figure 3 , Figure 4The bottom plate 1 is provided with a pushing mechanism on one side away from the positioning seat 2, and the pushing mechanism includes a front pushing structure 4 and a rear pushing structure 5, wherein the front pushing structure 4 includes a front pushing plate 41 and a pair of inner pressing claws 42, a through pushing hole 411 is provided on the front pushing plate 41, and limiting columns 43 are provided on both sides of the pushing hole 411, and the limiting columns 43 are fixed by fixing screws or fixing bolts through side holes 413 provided at the rear end of the front pushing plate 41, and the inner pressing claws 42 are arranged relatively up and down, and the inner pressing claws 42 are fixed in the pushing holes 411 by means of latches 44, and the inner pressing claws 42 extend in a direction toward one side of the fixing seat 3 and protrude from the front end of the front pushing plate 41, and the front end of the inner pressing claws 42 is provided with a guide end 421 with an inclined surface, and the rear pushing structure 5 includes a rear pushing plate 51, A push post 52 is provided on the rear push plate 51, and the push post 52 extends between the front push plate 41 and the internal pressure claw 42 through the push hole 411. The push post 52 is provided with a pair of push grooves 521 along its axial direction for limiting the internal pressure claw 42. When the push post 52 moves toward the bottom of the movement 82, the push post 52 is further limited by the internal pressure claw 42, so that the push post 52 can push the movement 82 more accurately. In the usual setting, the distance between the push post 52 and the internal pressure claw 42 is the distance from the buckle 83 of the movement 82 to the end of the movement 82. The purpose of this is that when the internal pressure claw 42 is clamped in the buckle 83, the push post 52 can be synchronously pressed against the end of the movement 82, thereby realizing that the pushing mechanism pushes the movement 82 synchronously between the internal pressure claw 42 and the push post 52.
[0026] The front push plate 41 and the rear push plate 51 are connected by an adjusting screw 55, and the adjusting screw 55 is movably arranged through the front push plate 41 and is screwed to the rear push plate 51, that is, the adjusting screw 55 and the rear push plate 51 are fixedly connected, and the adjusting screw 55 and the front push plate 41 are movably connected. The adjusting screw 55 is used to limit the distance between the front push plate 41 and the rear push plate 51, and the adjusting screw 55 can be screwed into the rear push plate 51 to adjust the distance between the front push plate 41 and the rear push plate 51. The front push plate 41 and the rear push plate 51 are connected with a spring 53, refer to Figure 5 The back side of the front push plate 1 is provided with a plurality of spring grooves 412 corresponding to the springs 53. The springs 53 are positioned through the spring grooves 412 so that the springs 53 can more stably realize the elastic connection between the front push plate 41 and the rear push plate 51. After the springs 53 are set, the front push plate 41 is supported by the springs 53 and elastically connected to the front of the rear push plate 51. During specific implementation, the front push plate 41 and the rear push plate 51 rely on the action of the springs 53 and the adjusting screw 55 to ensure that a spacing of 2.5 to 3 mm is reserved between the front push plate 41 and the rear push plate 51.
[0027] The rear push plate 51 is provided with a push cylinder 6, which moves the push mechanism toward the fixed seat 3. The inner pressure claw 42 passes through the guide end 421, and the guide end 421 is guided by an inclined surface, and is gradually guided to be inserted into the buckle 83 of the movement 82. After the buckle 83 is fully inserted and matched through the guidance of the inner pressure claw 42, the corresponding push column 52 is pressed against the end of the movement 82, and the buckle 83 is elastically relatively compressed under the action of the inner pressure claw 42. After the buckle 83 is compressed, the distance between the buckles 83 becomes smaller and is smaller than the distance between the inner grooves of the handle housing 81, so that the movement 82 can be inserted into the handle housing 81. The original interference fit becomes a clearance fit. Therefore, when the movement 82 is inserted into the handle housing 81, the resistance is small, and the pushing resistance is smaller than the elastic supporting force of the spring 53. Therefore, the front push plate 41 and the rear push plate 51 can be pushed by the push cylinder 6, the distance is kept unchanged and synchronous movement is achieved, the internal pressure claw 42 and the push column 52 simultaneously push the movement 82 toward the handle housing 81, and when the pushing mechanism moves to the limit column 43 abuts against the fixed seat 3, the abutment of the limit column 43 makes the resistance to the movement of the front push plate 41 large, and the pushing cylinder 6 cannot continue to push the front push plate 41 forward, and the front push plate 41 stops moving. However, in the process of the pushing cylinder 6 continuing to push the pushing mechanism, the pushing cylinder 6 acts on the rear push plate 51, so that the rear push plate 51 overcomes the supporting force of the spring 53, so that the rear push plate 51 continues to move toward the front push plate 41, and the rear push plate 51 drives the push column 52 to move forward relative to the internal pressure claw 42, and the push column 52 pushes the movement 82 so that the buckle 83 reaches the buckle groove 84 position, and the buckle 83 is disengaged from the internal pressure claw 42, so that the buckle 83 is snap-fitted in the buckle groove 84.
[0028] The locking cam 413 of the rear push plate 51 is locked by the locking cam 414, and the locking cam 415 is locked by the locking cam 416. The push in the direction of the axial centerline ensures that the push column 52 can better and accurately push the movement 82. At the same time, the limit sliding column 54 can also realize the sliding limit of the rear push plate 51. As the rear push plate 51 is pushed toward the front push plate 41, when the limit sliding column 54 is pressed against the inside of the side hole 413, the limit sliding column 54 can further limit the pushing stroke of the rear push plate 51. Therefore, through the limit sliding column 54, the rear push plate 51 can be accurately pushed, and the pushing stroke of the rear push plate 51 can be limited, so that the push column 52 pushes the movement 82 for a second time according to the limit distance of the limit sliding column 54, thereby realizing the purpose of disengaging the buckle 83 of the movement 82 and the internal pressure claw 42, and then accurately realizing the purpose of engaging the buckle 83 of the movement 82 with the buckle groove 84.
[0029] In the present invention, the movement 82 is pre-plugged and assembled on the handle shell 81, and the buckle 83 of the movement 82 is left at a certain distance outside the handle shell 81. Preferably, the distance is controlled to be 15-20 mm. The handle shell 81 is fixed in the fixing groove 31 of the fixing seat 3, and is positioned by pressing against the positioning seat 2. The manual control valve 7 is moved to make the push cylinder 6 move forward. After the inner pressure claw 42 of the forward push structure 4 contacts the buckle 83 of the movement 82, the buckle 83 is compressed inwardly due to the guidance of the guide end 421, so that the buckle 83 and the handle shell 81 are in clearance. At the same time, the push column 52 contacts the movement 82 to push the movement 82 forward. The handle shell 81 is pressed in. During the installation process, when the limit column 43 contacts the fixed seat 3, the front push plate 41 stops moving forward. At this time, there is still a certain distance between the buckle 83 of the movement 82 and the buckle groove 84 of the handle shell 81. Usually, the distance is controlled at 2 mm. At this time, the rear push plate 51 drives the push column 52 to continue pushing forward, so that the buckle 83 of the movement 82 is disengaged from the internal pressure claw 42, and the buckle 83 of the movement 52 is engaged with the buckle groove 84 of the handle shell 81. The movement 82 and the handle shell 81 are assembled in place. Finally, the manual control valve 7 is used to push the cylinder 6 back to take out the assembled product.
[0030] The above embodiments only express the implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.
Claims
1. A movement assembly device for an electric toothbrush, comprising a bottom plate, characterized in that: The cam is provided with a fixing seat on one side of the base plate, and the fixing seat is provided with a fixing slot, and a positioning seat is provided on the outer side of the fixing seat, and the handle shell is abutted against the positioning seat for positioning and is fixed by the fixing slot, and the base plate is provided with a pushing mechanism on the side away from the positioning seat. The pushing mechanism comprises a front pushing structure and a rear pushing structure, and the front pushing structure comprises a front pushing plate and a pair of inner pressing claws, and a through pushing hole is provided on the front pushing plate. Limiting columns are provided on both sides of the pushing hole, and the inner pressing claws are relatively arranged up and down and fixed in the pushing hole, and the inner pressing claws extend in a direction toward one side of the fixing seat and protrude from the front end of the front pushing plate, and the front end of the inner pressing claws is provided with a guiding end with an inclined surface, and the rear pushing structure comprises a rear pushing plate, and a pushing column is provided on the rear pushing plate, and the pushing column extends through the pushing hole between the front pushing plate and the inner pressing claw, and the front pushing plate and the rear pushing plate are connected by an adjusting screw, and the adjusting screw is movable through The rear push plate drives the push column to move forward relative to the inner pressure claw, and the push column pushes the movement so that the buckle reaches the buckle groove position and causes the buckle to disengage from the inner pressure claw, so that the buckle is engaged in the buckle groove.
2. The core assembly device of an electric toothbrush according to claim 1, characterized in that: The positioning seat is provided with a clearance groove, and the central axis of the clearance groove coincides with the central axis of the fixing groove.
3. The core assembly device of an electric toothbrush according to claim 1, characterized in that: The fixing seat is provided with a hand groove, and the hand groove and the fixing groove are vertically staggered.
4. The core assembly device of an electric toothbrush according to claim 1, characterized in that: The push column is provided with a pair of push grooves along its axial direction for limiting the inner pressure claws.
5. The core assembly device of an electric toothbrush according to claim 1, characterized in that: The front push plate has a rear end provided with a pair of side holes for fixing the limiting columns.
6. The core assembly device of an electric toothbrush according to claim 5, characterized in that: The rear push plate is provided with a limit sliding column, and the limit sliding column is movably sleeved inside the side hole.
7. The core assembly device of an electric toothbrush according to claim 1, characterized in that: The back side of the front push plate is provided with a plurality of spring grooves corresponding to the springs.
8. The core assembly device of an electric toothbrush according to claim 1, characterized in that: The bottom plate is provided with a manual control valve for controlling the pushing cylinder.