An automatic ejection clamping device
By combining the design of drive gear, rack and pinion, latch and return spring, the safety hazards and high cost of existing mobile phone clamping devices when automatically opening are solved, and the clamp legs can be opened smoothly and gently.
Patent Information
- Application Number
- CN202522434991.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-17
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-17
AI Technical Summary
Existing mobile phone clamping devices are prone to pinching hands or having excessive force when automatically opening, posing safety hazards and being costly.
The design employs a combination of a drive gear, a rack, a latch, a first return spring, and a second return spring. Through the meshing transmission between the rack and the drive gear, the clamp legs can be smoothly released, thus buffering the energy release.
It achieves a smooth and gentle automatic opening of the clamp legs, avoiding the impact caused by sudden opening, improving safety and reducing costs.
Smart Images
Figure CN224927782U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of clamping device technology, and in particular to an automatically spring-opening clamping device. Background Technology
[0002] With the widespread use of smartphones, mobile phone clamping devices are increasingly used in daily life and professional scenarios, such as in-car navigation, sports photography, video conferencing, and fixed-position viewing.
[0003] Currently, most mobile phone clamps on the market are pulled open by compression springs. These clamps require a certain amount of force to open, are easy to pinch hands, and are expensive. Another type of automatic spring-opening clamp is made by directly locking the button to the clamp legs and automatically opening by compression springs. This type of clamp opens quickly and with great force, which can easily cause injury and the product is prone to damage. Utility Model Content
[0004] The purpose of this invention is to provide an automatically opening clamping device that allows the clamp to open smoothly.
[0005] This utility model provides an automatically opening clamping device, including a clamping housing, a pair of clamping legs slidably connected within the clamping housing, and a clamping plate fixed to one end of the clamping legs and located outside the clamping housing; the open surface of the clamping housing is provided with an end cap, the end cap being L-shaped, with its short side parallel and opposite to the clamping plate, and also includes a transmission locking mechanism: The transmission locking mechanism includes: A drive gear is rotatably disposed within the clamping housing; A rack portion is disposed on one of the clamp legs and meshes with the drive gear; The latch is slidably disposed within the clamping housing. One end of the latch has an exposed button, and the other end has a pointed tip. The engagement point between the pointed tip and the drive gear is an off-center position. A first return spring is connected between the buckle and the clamping housing; The second return spring is used to provide a driving force to the clamp legs in the opening direction; In the locked state, the tip of the buckle engages with the drive gear to prevent it from reversing. When the button is pressed to disengage the buckle from the drive gear, the clamp legs open under the drive of the second return spring and smoothly spring open through the meshing of the rack and pinion with the drive gear.
[0006] Preferably, the connecting assembly is located on the side of the clamping housing away from the end cap; The connection assembly includes a mounting backplate, which is connected to the clamping housing by fasteners, and one end of which extends outward from the clamping housing. A ball joint connector, wherein the ball joint connector is rotatably connected to the extension end of the mounting back plate via a connecting shaft; The ball joint connector has a threaded hole inside for connecting to external equipment.
[0007] Preferably, the profile of the tip of the latch is adapted to the profile of the teeth of the drive gear, so that when the drive gear rotates in the locking direction, the teeth can slide along the surface of the tip and push the latch to compress the first return spring. When the drive gear attempts to rotate in the opposite direction, the pointed end will engage with the root of the drive gear teeth to form a reverse self-locking mechanism.
[0008] Preferably, the drive gear is sleeved on the support shaft platform protruding inside the clamping housing through a central hole.
[0009] Preferably, the support shaft platform is internally fitted with an embedded nut.
[0010] Preferably, the pair of clamp legs are slidably connected to each other via a male and female guide rail.
[0011] Preferably, the buckle mechanism is provided with a limiting groove, and the clamping housing is provided with a limiting post that cooperates with the limiting groove to limit the sliding stroke of the buckle mechanism.
[0012] Preferably, the ball joint can be rotated and adjusted around the axis of the connecting shaft.
[0013] The automatic spring-opening clamping device provided by this utility model has the following beneficial effects: Through the coordinated operation of the drive gear, rack, latch, first return spring, and second return spring, the compressed second return spring releases its elastic potential energy, driving the clamp legs to move in the opening direction. The linear motion of the clamp legs is transmitted to the drive gear through the rack, causing it to rotate in the opening direction. This transmission process converts the instantaneous elastic force of the second return spring into the rotational kinetic energy of the drive gear, effectively buffering and dissipating energy, allowing the clamp legs to open smoothly and gently, avoiding the impact that may be caused by sudden opening and preventing injury from excessive opening force. Attached Figure Description
[0014] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the clamping shell, clamping plate, end cover, back plate, ball joint connector and connecting shaft in this utility model; Figure 3 This is a schematic diagram of the structure of the clamping shell, back plate, ball joint connector and connecting shaft in this utility model; Figure 4 This is a schematic diagram of the structure of the clamping plate, end cap, and button in this utility model; Figure 5 This is a schematic diagram of the drive gear, rack, and tip of the present invention. Figure 6 This is an assembly diagram of the rack, clamp legs, and clamping plate in this utility model. Figure 7 This is an assembly diagram of the rack, clamp legs, and clamping plate in this utility model. Figure 8 This is an assembly diagram of the first return spring, the second return spring, and the clamping housing in this utility model; Figure 9 This is a structural plan view of the buckle, button, nozzle, and limiting groove in this utility model; Figure 10 This is an assembly diagram of the support shaft, embedded nut, and clamping housing in this utility model.
[0016] Explanation of reference numerals in the attached figures: 1-Clamping housing, 2-Clamping leg, 3-Clamping plate, 4-End cover, 5-Drive gear, 6-Rack section, 7-Clamping mechanism, 71-Button, 72-Nose section, 73-Limiting groove, 8-First return spring, 9-Second return spring, 10-Back plate, 11-Ball head connector, 111-Threaded hole, 12-Connecting shaft, 13-Supporting shaft platform, 14-Embedded nut, 15-Guide slide rail, 16-Limiting post. Detailed Implementation
[0017] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0019] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0020] In this embodiment, as Figure 1 , Figure 2 and Figure 8 As shown, an automatically opening clamping device includes a clamping housing 1, a pair of clamping legs 2 slidably connected inside the clamping housing 1, and a clamping plate 3 fixed to one end of the clamping legs 2 and located outside the clamping housing 1; the open surface of the clamping housing 1 is provided with an end cap 4, the end cap 4 is L-shaped, and its short side is parallel to and opposite to the clamping plate 3; it also includes a transmission locking mechanism. The transmission locking mechanism includes: a drive gear 5, rotatably disposed within the clamping housing 1; a rack portion 6, disposed on one of the clamping legs 2 and meshing with the drive gear 5; a latch 7, slidably disposed within the clamping housing 1, having an exposed button 71 at one end and a pointed tip 72 at the other end, the meshing point of the pointed tip 72 with the drive gear 5 being an off-center position; a first return spring 8, connected between the latch 7 and the clamping housing 1; and a second return spring 9, used to provide a driving force to the clamping legs 2 in the opening direction. In the locked state, the pointed part 72 of the latch 7 engages with the drive gear 5 to prevent it from reversing; when the button 71 is pressed to disengage the latch 7 from the drive gear 5, the clamp leg 2 opens under the drive of the second return spring 9, and is smoothly opened through the meshing transmission between the rack part 6 and the drive gear 5.
[0021] Thus, through the cooperation of the rack 6 and the drive gear 5, the energy of the clamping plate 3 during the release process is buffered, thereby allowing it to spring open smoothly. It should be noted that: the end cap 4 has an L-shaped structure and is made of the same material as the clamping housing 1. It is fixedly connected to the clamping housing 1 by buckles and screws. A buffer pad is attached to the inner side of its short side, which, together with the clamping plate 3, completes the protective clamping of the clamped object; the clamping plate 3 is fixed to the front end of the clamping leg 2, is covered with soft rubber material, and has anti-slip texture on the surface to increase friction and prevent the clamped object from slipping; the tip 72 has undergone heat treatment and precision machining, and its contour is precisely matched with the tooth contour of the drive gear 5.
[0022] In some embodiments, such as Figure 2 and Figure 3 As shown, the connecting assembly is located on the side of the clamping housing 1 away from the end cover 4; the connecting assembly includes a mounting back plate 10, which is connected to the clamping housing 1 by fasteners, and one end of which extends outward from the clamping housing 1; a ball joint connector 11, which is rotatably connected to the extended end of the mounting back plate 10 by a connecting shaft 12; the ball joint connector 11 has a threaded hole 111 inside for connecting to external equipment.
[0023] Specifically, the mounting back plate 10 is fixedly connected to the clamping housing 1 by screws, and the ball joint 11 can be angled around the connecting shaft 12 and connected to external equipment such as tripods and brackets through the threaded hole 111 to achieve multi-angle fixation.
[0024] In some embodiments, such as Figure 8 As shown, the profile of the tip 72 of the latch 7 is adapted to the profile of the tooth of the drive gear 5, so that when the drive gear 5 rotates in the locking direction, the tooth can slide along the surface of the tip 72 and push the latch 7 to compress the first return spring 8; when the drive gear 5 attempts to rotate in the opposite direction, the tip 72 will engage with the root of the tooth of the drive gear 5 to form a reverse self-locking. Specifically, the inclined surface of the pointed part 72 engages with the tooth surface of the drive gear 5, allowing the drive gear 5 to slide smoothly when rotating in the forward direction and be stopped when rotating in the reverse direction, thus achieving reliable locking.
[0025] In some embodiments, such as Figure 10 As shown, the drive gear 5 is sleeved on the support shaft platform 13 protruding inside the clamping housing 1 through the central hole; Specifically, the support shaft platform 13 is a cylindrical boss, integrally formed with the clamping housing 1, and the drive gear 5 is sleeved on it through the central hole to achieve rotational support; It should be noted that the height of the support shaft platform 13 is slightly greater than the thickness of the drive gear 5 to ensure that the gear does not interfere with the housing when it rotates. In addition, the drive gear 5 can also be connected to the support shaft platform 13 through bearings.
[0026] In some embodiments, such as Figure 10 As shown, an embedded nut 14 is installed inside the support shaft platform 13; Specifically, the embedded nut 14 is pressed into the center hole of the support shaft 13 to fix the entire device to the clamping housing 1 by screws.
[0027] In some embodiments, such as Figure 5 and Figure 8 As shown, a pair of clamp legs 2 are slidably connected to each other via a male and female guide rail 15.
[0028] Specifically, guide rails 15 are respectively set on the opposite surfaces of the two clamp legs 2, and precise guidance is achieved through the concave-convex fit to prevent the clamp legs 2 from deviating during the sliding process.
[0029] In some embodiments, such as Figure 9 and Figure 10 As shown, the buckle 7 is provided with a limiting groove 73, and the clamping housing 1 is provided with a limiting post 16 that cooperates with the limiting groove 73 to limit the sliding stroke of the buckle 7. Specifically, the limiting groove 73 is an elongated hole structure, through which the limiting post 16 passes to limit the sliding of the buckle 7 within a set range, preventing excessive displacement that could lead to mechanism failure.
[0030] In some embodiments, such as Figure 2 and Figure 3 As shown, the ball joint 11 can be rotated and adjusted around the axis of the connecting shaft 12; It should be noted that the rotation angle of the ball joint connector 11 can be locked by adjusting the screw to meet the needs of multi-angle fixing.
[0031] The working principle of this application is illustrated below with a preferred embodiment: The phone is placed between the end cover 4 and the clamping plate 3. The user presses the clamping plate 3 on the side, causing the clamp legs 2 to slide and close in opposite directions within the clamping housing 1. At the same time, the second return spring 9 is compressed. The rack part 6 on the clamp leg 2 drives the drive gear 5 to rotate in the locking direction. During the rotation, the teeth of the drive gear 5 contact the tip 72 of the latch 7. Since the meshing point between the tip 72 and the gear is eccentric, the rotation of the gear will push the latch 7 to slide backward against the elastic force of the first return spring 8. When the teeth slide past the apex of the tip 72, the latch 7 quickly resets under the action of the first return spring 8, causing the tip 72 to engage with the root of the drive gear 5, forming a reverse self-locking mechanism to prevent the gear from reversing. This process is accompanied by the reset action of the latch 7, producing audible feedback. When it is necessary to release the clamping plate 3, the user presses button 71 on the latching mechanism 7, causing the latching mechanism 7 to slide backward, disengaging its tip 72 from the drive gear 5 and releasing the reverse self-locking. After the self-locking is released, the compressed second return spring 9 releases its elastic potential energy, driving the clamp leg 2 to move in the opening direction. The linear motion of the clamp leg 2 is transmitted to the drive gear 5 through the rack part 6, causing it to rotate in the spring-opening direction. This transmission process converts the instantaneous elastic force of the second return spring 9 into the rotational kinetic energy of the drive gear 5, effectively buffering and dissipating energy, so that the clamp leg 2 can achieve a smooth and gentle automatic spring-opening.
[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. An automatically opening clamping device, comprising a clamping housing (1), a pair of clamping legs (2) slidably connected within the clamping housing (1), and a clamping plate (3) fixed to one end of the clamping legs (2) and located outside the clamping housing (1); the open surface of the clamping housing (1) is provided with an end cap (4), the end cap (4) being L-shaped, and its short side being parallel and opposite to the clamping plate (3), characterized in that, It also includes a transmission locking mechanism: The transmission locking mechanism includes: The drive gear (5) is rotatably disposed within the clamping housing (1); A rack portion (6) is disposed on one of the clamp legs (2) and meshes with the drive gear (5); The buckle (7) is slidably disposed in the clamping housing (1), with an exposed button (71) at one end and a pointed tip (72) at the other end. The meshing point of the pointed tip (72) and the drive gear (5) is an off-center position. The first return spring (8) is connected between the buckle (7) and the clamping housing (1); The second return spring (9) is used to provide a driving force to the clamp leg (2) in the opening direction; In the locked state, the tip (72) of the buckle (7) meshes with the drive gear (5) to prevent it from reversing; when the button (71) is pressed to disengage the buckle (7) from the drive gear (5), the clamp leg (2) opens under the drive of the second return spring (9) and is smoothly opened through the meshing transmission of the rack part (6) and the drive gear (5).
2. The automatically spring-opening clamping device according to claim 1, characterized in that, It also includes a connecting component disposed on the side of the clamping housing (1) away from the end cap (4); The connection assembly includes a mounting back plate (10), which is connected to the clamping housing (1) by fasteners, and one end of which extends outward from the clamping housing (1). Ball joint connector (11), which is rotatably connected to the extension end of the mounting back plate (10) via a connecting shaft (12); The ball joint connector (11) has a threaded hole (111) inside for connecting to external equipment.
3. The automatically spring-opening clamping device according to claim 2, characterized in that, The profile of the tip (72) of the latch (7) is adapted to the profile of the tooth of the drive gear (5), so that when the drive gear (5) rotates in the locking direction, the tooth can slide along the surface of the tip (72) and push the latch (7) to compress the first return spring (8). When the drive gear (5) attempts to rotate in the opposite direction, the tip (72) will engage with the root of the drive gear (5) to form a reverse self-locking mechanism.
4. The automatically spring-opening clamping device according to claim 1, characterized in that, The drive gear (5) is sleeved on the support shaft (13) protruding inside the clamping housing (1) through the central hole.
5. The automatically spring-opening clamping device according to claim 4, characterized in that, The support shaft (13) is fitted with an embedded nut (14).
6. The automatically spring-opening clamping device according to claim 1, characterized in that, The pair of clamp legs (2) are slidably connected to each other by a male and female guide rail (15).
7. The automatically spring-opening clamping device according to claim 1, characterized in that, The buckle (7) is provided with a limiting groove (73), and the clamping housing (1) is provided with a limiting post (16) that cooperates with the limiting groove (73) to limit the sliding stroke of the buckle (7).
8. The automatically spring-opening clamping device according to claim 2, characterized in that, The ball joint (11) can be rotated and adjusted around the axis of the connecting shaft (12).