Double-spring-bolt driving mechanism

Abstract

The utility model relates to a double lock tongue driving mechanism, including power source, transmission subassembly, turnover subassembly, the turnover subassembly includes first lock tongue, second lock tongue, connect the output shaft of first lock tongue and second lock tongue, also includes the fixed seat that is used for supporting the output shaft, cam, output shaft can rotate relative to fixed seat, and the cam is used for supporting the output shaft. The power source drives the cam to rotate through the transmission assembly, the first spring bolt is provided with a swing arm abutting against the cam, the second spring bolt and the first spring bolt can rotate synchronously through the output shaft, and one end of the output shaft is sleeved with a torsion spring enabling the swing arm to abut against the cam. By the adoption of the technical scheme, the double-spring-bolt driving mechanism is provided, one power source is adopted to drive the two spring bolts to rotate synchronously, overturning operation is achieved, cost is reduced, the output bearing connected with the two spring bolts bears external force, and internal transmission parts are protected.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle screens, in particular to a double-lock tongue driving mechanism. Background Art

[0002] As consumers' demand for in-car entertainment products continues to increase, display screens will be added to the back seats of cars for passengers to entertain themselves on the road. In order to save space and protect the screens, many display screens can now be flipped over. When the display screens are not needed, they can be flipped over to a hidden state; when they are needed, they can be flipped out again.

[0003] In the prior art, both sides of a common display screen are provided with a lock tongue and a driving structure for driving the lock tongue to rotate. The two sets of driving structures not only take up space, but also increase the production cost. Moreover, when external force is applied to the screen, the lock tongues on both sides bear most of the external force and directly react on the internal gear set, which may cause damage to internal parts. Summary of the invention

[0004] Purpose of the utility model: In order to overcome the defects of the prior art, the utility model provides a double lock tongue drive mechanism, which adopts one power source to drive the two lock tongues to rotate synchronously, realizes the flipping operation, reduces the cost, and the output shaft connecting the two lock tongues is subjected to external forces, thereby protecting the internal transmission parts.

[0005] The technical solution of the utility model is as follows: a double lock tongue driving mechanism, comprising a power source, a transmission assembly, and a flip assembly, wherein the flip assembly comprises a first lock tongue, a second lock tongue, an output shaft connecting the first lock tongue and the second lock tongue, and also comprises a fixed seat and a cam for supporting the output shaft, the output shaft can rotate relative to the fixed seat, the power source drives the cam to rotate via the transmission assembly, the first lock tongue is provided with a swing arm abutting against the cam, the second lock tongue can rotate synchronously with the first lock tongue via the output shaft, and one end of the output shaft is sleeved with a torsion spring for keeping the swing arm and the cam abutting against each other.

[0006] By adopting the above technical solution, the first lock tongue and the second lock tongue are fixed to the output shaft and can be rotatably arranged relative to the fixed seat. The cam is provided with an arc surface on the side close to the swing arm, so that the first lock tongue rotates more smoothly, and at the same time increases the contact area when the two are against each other, so that the transmission is more stable. The cam structure is simple, and the power source can be a motor. When the motor rotates forward, the cam pushes out to drive the first lock tongue to rotate, thereby driving the output shaft and the second lock tongue to flip synchronously. At this time, the torsion spring is deformed, and the cam actively abuts against the swing arm; when the motor rotates reversely, the cam retracts, and the force on the first lock tongue fails. The torsion spring drives the first lock tongue to reset, thereby driving the output shaft and the second lock tongue to flip synchronously. At this time, the swing arm actively abuts against the cam. In the above process, the cam and the swing arm always keep abutting against each other. A separate power source is used to drive the entire flip assembly to rotate, eliminating a set of drive structures and reducing costs; the screen in the car is installed on the output shaft. When the screen receives external force, the output shaft bears most of the external force, protecting the lock tongues on both sides and the drive parts inside the structure to avoid damage.

[0007] The utility model is further configured as follows: a worm is provided at the output end of the power source, the transmission assembly includes a worm wheel meshing with the worm, a transmission gear rotating coaxially with the worm wheel, a turntable rotating synchronously with the transmission gear, a passive tooth meshing with the transmission gear is provided on the outer periphery of the turntable part, and the cam is coaxially arranged with the turntable.

[0008] By adopting the above-mentioned further arrangement, the worm gear is integrated with or fixed to the transmission gear to achieve the same-direction and coaxial rotation of the two, eliminating a first-level transmission structure, and the structure is compact. The central angle corresponding to the chord length of the passive tooth on the outer periphery of the turntable is the angle that the turntable needs to rotate. Only the passive teeth are designed along part of the outer periphery of the turntable to avoid useless processing steps. The design is reasonable. The cam is fixed or integrally arranged on the turntable and rotates coaxially with the turntable. The power transmission structure is simple and the design is reasonable.

[0009] The utility model is further configured as follows: the fixing seat is provided with a receiving groove for fixing one end of the torsion spring, the first locking tongue is provided with a fixing hole for fixing the other end of the torsion spring, and one end of the torsion spring located in the receiving groove is bent.

[0010] With the above-mentioned further arrangement, the fixed seat is fixed on the mounting surface to support the flip assembly. One end of the torsion spring is located in the receiving groove and does not rotate, while the other end is located in the fixed hole and rotates with the lock tongue to ensure that the swing arm is always in contact with the cam. The torsion spring located in the receiving groove is bent to prevent it from sliding out of the receiving groove, thereby having a limiting effect.

[0011] The utility model is further configured that: the fixing hole is a waist hole.

[0012] With the above further arrangement, the waist hole is not arranged in an arc shape, which does not affect the resetting effect of the lock tongue. When the lock tongue rotates, the waist hole provides a space for the torsion spring to move, thereby reducing the processing accuracy of the fixing hole.

[0013] The utility model is further configured as follows: washers are sleeved on both ends of the output shaft, and an empty groove adapted to the washers is provided on the fixing seat.

[0014] With the above further arrangement, the washer facilitates the installation of the output shaft on the fixing seat, and the connection is firm.

[0015] The utility model is further configured as follows: it also includes a shell covering the transmission component, the power source is fixed on the shell, a positioning piece extending downward is provided on the top of the shell for positioning the output end of the power source, and the shell is provided with a first support shaft for supporting the worm gear and the transmission gear and a second support shaft for supporting the turntable.

[0016] With the above further arrangement, the motor is fixed to the housing by screws, a positioning sleeve is provided on the output end of the motor, and the positioning sleeve is engaged with the positioning sheet. The housing can not only be used to install the power source and transmission components, but also protect the transmission components to ensure the stability of the drive. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of a specific embodiment of the utility model;

[0018] Figure 2 It is a first side view of a specific embodiment of the utility model;

[0019] Figure 3 It is a second side view of a specific embodiment of the utility model;

[0020] Figure 4 This is a driving structure diagram of the first lock tongue in the utility model;

[0021] Figure 5 This is the first structural diagram of the torsion spring in the utility model;

[0022] Figure 6 This is the second structural diagram of the torsion spring in the utility model;

[0023] Figure 7 It is a cross-sectional view of the shell in the utility model.

[0024] In the figure: 1, motor; 11, worm; 12, positioning sleeve; 21, worm wheel; 22, transmission gear; 23, turntable; 231, passive tooth; 24, raised portion; 31, first locking tongue; 311, bump; 32, second locking tongue; 33, output shaft; 34, fixing hole; 35, washer; 4, fixing seat; 41, accommodating groove; 5, torsion spring; 61, housing; 61, positioning sheet; 62, first support shaft; 63, second support shaft. Implementation

[0025] The technical scheme in this embodiment will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that in the description of the present invention, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. In the description of the present invention, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically limited.

[0028] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that technical personnel in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] like Figure 1-7As shown, a double-lock tongue driving mechanism of the utility model includes a power source, a transmission component, and a flip component. The flip component includes a first lock tongue 31, a second lock tongue 32, an output shaft 33 connecting the first lock tongue 31 and the second lock tongue 32, and also includes a fixed seat 4 and a cam 24 for supporting the output shaft 33. The output shaft 33 can rotate relative to the fixed seat 4. The first lock tongue 31 and the second lock tongue 32 are fixed to the output shaft 33 and can be rotatably arranged relative to the fixed seat 4. The power source drives the cam 24 to rotate through the transmission component. The first lock tongue 31 is provided with a swing arm 311 abutting against the cam 24. The second lock tongue 32 can rotate synchronously with the first lock tongue 31 through the output shaft 33. The cam 24 is provided with an arc surface on the side close to the swing arm 311, so that the first lock tongue 31 rotates more smoothly and increases the contact area when the two abut against each other, so that the transmission is more stable. The cam 24 has a simple structure. One end of the output shaft 33 is sleeved with a torsion spring that keeps the swing arm 311 and the cam 24 abutting against each other. The power source can be the motor 1. When the motor 1 rotates forward, the cam 24 pushes out to drive the first lock tongue 31 to rotate, thereby driving the output shaft 33 and the second lock tongue 32 to flip synchronously. At this time, the torsion spring 5 is deformed, and the cam 24 actively abuts against the swing arm 311. When the motor 1 rotates reversely, the cam 24 retracts, and the force on the first lock tongue 31 fails. The torsion spring 5 drives the first lock tongue 31 to reset, thereby driving the output shaft 33 and the second lock tongue 32 to flip and reset synchronously. At this time, the swing arm 311 actively abuts against the cam 24. During the above process, the cam 24 and the swing arm 311 always keep abutting against each other. Using a separate power source to drive the entire flip assembly to rotate eliminates a set of drive structures and reduces costs. The screen in the car is located on the output shaft 33. When the screen receives external force, the output shaft 33 bears most of the external force, protecting the lock tongues and drive parts on both sides to avoid damage.

[0030] like Figure 2-4 As shown, a worm 11 is provided at the output end of the power source, and a transmission assembly includes a worm wheel 21 meshing with the worm 11, a transmission gear 22 coaxially rotating with the worm wheel 21, and a turntable 23 synchronously rotating with the transmission gear 22. The worm wheel 21 is integrated with or fixed to the transmission gear 22 to achieve the same direction and coaxial rotation of the two, eliminating a primary transmission structure, and having a compact structure. A passive tooth 231 meshing with the transmission gear 22 is provided on a portion of the outer periphery of the turntable 23. The central angle of the passive tooth 231 corresponding to the chord length of the outer periphery of the turntable 23 is the angle that the turntable 23 needs to rotate. The passive tooth 231 is only designed along a portion of the outer periphery of the turntable 23, avoiding useless processing procedures and having a reasonable design. The cam 24 is fixed or integrally arranged on the turntable 34, and rotates coaxially with the turntable 34. The power transmission structure is simple and the design is reasonable.

[0031] like Figure 5 , 6As shown, the fixing seat 4 is provided with a receiving groove 41 for fixing one end of the torsion spring 5, and the first locking tongue 31 is provided with a fixing hole 34 for fixing the other end of the torsion spring 5. The fixing seat 4 is fixed on the mounting surface, one end of the torsion spring 5 is located in the receiving groove 41 and does not rotate, and the other end is located in the fixing hole 34 and rotates with the locking tongue, thereby ensuring that the swing arm 311 is always in contact with the cam 24. The torsion spring 5 located in the receiving groove 41 is bent to avoid sliding out of the receiving groove 41, thereby having a limiting effect.

[0032] like Figure 2 , 5 As shown, the fixing hole 34 is a waist hole, which is not arc-shaped and does not affect the resetting effect of the lock tongue. When the lock tongue rotates, the waist hole provides a space for the torsion spring 5 to move, which reduces the processing accuracy of the fixing hole 34.

[0033] like Figure 5 , 6 As shown, washers 35 are respectively sleeved on both ends of the output shaft 33, and a hollow groove adapted to the washers 35 is provided on the fixing seat 4. The washers 35 facilitate the installation of the output shaft 33 on the fixing seat 4, and the connection is firm.

[0034] like Figure 7 As shown, it also includes a shell 6 covering the top of the transmission assembly, the motor 1 is fixed to the shell 6 by screws, a positioning piece 61 extending downward is provided on the top of the shell 6, a positioning sleeve 12 is provided on the output end of the motor 1, and the positioning sleeve 12 is engaged with the positioning piece 61. The shell 6 is provided with a first support shaft 62 for supporting the worm gear 21 and the transmission gear 22 and a second support shaft 63 for supporting the turntable 23. The shell 6 can not only be used to install the motor 1 and the transmission assembly, but also protect the transmission assembly to ensure the stability of the drive.

Claims

1. A double-bolt drive mechanism, comprising a power source, a transmission assembly, and a flip assembly, characterized in that: The flip assembly comprises a first locking tongue (31), a second locking tongue (32), an output shaft (33) connecting the first locking tongue (31) and the second locking tongue (32), and also comprises a fixing seat (4) and a cam (24) for supporting the output shaft (33); the output shaft (33) can rotate relative to the fixing seat (4); the power source drives the cam (24) to rotate via the transmission assembly; the first locking tongue (31) is provided with a swing arm (311) abutting against the cam (24); the second locking tongue (32) can rotate synchronously with the first locking tongue (31) via the output shaft (33); and one end of the output shaft (33) is sleeved with a torsion spring (5) for keeping the swing arm (311) and the cam (24) abutting against each other.

2. A double bolt drive mechanism according to claim 1, characterized in that: A worm (11) is provided at the output end of the power source, and the transmission assembly comprises a worm wheel (21) meshing with the worm wheel (11), a transmission gear (22) coaxially rotating with the worm wheel (21), and a rotating disk (23) rotating synchronously with the transmission gear (22); a passive tooth (231) meshing with the transmission gear (22) is provided on a portion of the outer periphery of the rotating disk (23), and the cam (24) is coaxially arranged with the rotating disk (23).

3. A double bolt drive mechanism according to claim 1 or 2, characterized in that: The fixing seat (4) is provided with a receiving groove (41) for fixing one end of the torsion spring (5), and the first locking tongue (31) is provided with a fixing hole (34) for fixing the other end of the torsion spring (5), and one end of the torsion spring (5) located in the receiving groove (41) is bent.

4. A double bolt drive mechanism according to claim 3, characterized in that: The fixing hole (34) is a waist hole.

5. A double bolt drive mechanism according to claim 1 or 2, characterized in that: Washers (35) are respectively sleeved on both ends of the output shaft (33), and a hollow groove adapted to fit the washers (35) is provided on the fixing seat (4).

6. A double bolt driving mechanism according to claim 2, characterized in that: The invention also comprises a housing (6) which is arranged above the transmission assembly, the power source is fixed on the housing (6), a positioning piece (61) extending downward is provided on the top of the housing (6) for positioning the output end of the power source, and a first supporting shaft (62) for supporting the worm gear (21) and the transmission gear (22) and a second supporting shaft (63) for supporting the rotating disk (23) are provided on the housing (6).

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