Six-cam torsion module in portable electronic product hinge
By setting six pairs of cams in the hinge of portable electronic products and using compression springs to synchronously control the compression amount, the problems of insufficient number of cams and force imbalance in traditional hinges are solved, achieving more efficient rotational resistance and locking force.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2026-03-24
AI Technical Summary
In traditional portable electronic product hinges, the limited number of cams results in insufficient rotational resistance and locking force, and an imbalance of friction surfaces and forces on both sides of the mounting base.
Six pairs of cams are set on a shaft, including a middle fixed seat and two end fixed seats on both sides. Three pairs of cams are used and pressed together by compression springs to ensure that there are friction surfaces on both sides of the middle fixed seat. The force is balanced by synchronously controlling the compression of the cam pairs.
It improves the utilization rate of axial space, achieves force balance and friction surface uniformity on both sides of the intermediate fixed seat, and provides stable rotational resistance and locking force.
Smart Images
Figure CN224032942U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a cam torque module in the hinge of portable electronic products, such as mobile phones, laptops, etc., and also includes accessories attached to these products, such as stands or other functional devices. Background Technology
[0002] For hinges in portable electronic products, it's not enough to simply provide a connection function—for example, rotatably connecting two shells of a portable electronic product or movably connecting a functional device to the main body of the product; it also provides functions such as rotational resistance and locking force at the stop position. Generally, increasing the number of cam pairs is an effective solution to improve rotational resistance and locking force. However, in traditional designs, only one pair of cams can be installed on each side of the mounting base to ensure both sides can be used as friction surfaces. A dual-axis cam torque module has only two cams on each axis. Some designs can add a pair of cams on one side, but this sacrifices the friction surface on that side of the mounting base and also causes an imbalance of forces on both sides of the mounting base. Utility Model Content
[0003] The purpose of this invention is to provide a six-cam torque module for hinges in portable electronic products. This module allows for the installation of six pairs of cams on a single shaft, resulting in high axial space utilization, good force balance on both sides of the central fixing seat, and a sufficient number of friction surfaces. To this end, this invention adopts the following technical solution:
[0004] A six-cam torque module in the hinge of a portable electronic product includes a shaft and a compression spring. The six-cam torque module is characterized by having a central fixed seat and end fixed seats on both sides of the central fixed seat. The central fixed seat and the end fixed seats are provided with shaft holes, through which the shaft passes and is positioned axially.
[0005] The six-cam torque mold has three pairs of cams between the middle fixed seat and the end fixed seats on each side. From the middle fixed seat to the end fixed seat, they are the first cam pair, the second cam pair, and the third cam pair, respectively. Each cam is sleeved on the shaft. A compression spring is located between the first cam pair and the second cam pair. The compression spring presses the first cam pair, the second cam pair, and the third cam pair together, so that the two sides of the middle fixed seat press against the adjacent rotating parts sleeved on the shaft.
[0006] The first cam pair and the cam group consisting of the second cam pair and the third cam pair compress the compression spring in opposite directions, and the third cam pair increases the compression stroke of the second cam pair on the compression spring.
[0007] Based on the above technical solutions, the present invention may also adopt the following further technical solutions, or combine these further technical solutions:
[0008] The first cam pair and the cam group consisting of the second and third cam pairs synchronize the control of the compression amount change of the compression spring.
[0009] The cam pair consists of a moving cam that can rotate relative to the fixed base and a stationary cam that cannot rotate relative to the fixed base; the stationary cam in the second cam pair can slide relative to the shaft, and the moving cams in the second and third cam pairs can slide relative to the shaft.
[0010] Limiting members that are connected to the shaft and correspond to the end fixing seats are respectively provided on the outer side of the end fixing seats on both sides to axially position the shaft.
[0011] The connecting arms in the hinge are arranged together with the moving cam and move synchronously, and each connecting arm is connected to the housing of the portable electronic product hinge on its side.
[0012] In the first cam pair, the moving cam is located on the side closer to the middle fixed seat; in the first cam pair and the second cam pair, the stationary cam is located on the side closer to the compression spring; in the third cam pair, the stationary cam is located at the inner end of the end fixed seat.
[0013] A friction fit is formed between the back of the moving cam of the first cam pair and the intermediate fixed seat.
[0014] The moving cams of the second cam pair and the second cam pair are located at both ends of the same component.
[0015] The cam pairs on both sides of the intermediate fixed seat are symmetrical and identical, and the compression springs on both sides of the intermediate fixed seat are identical.
[0016] The hinge is a dual-axis hinge, and is provided with two sets of the six-cam torque modules as described in any one of claims 1-8. Furthermore, the cams on the two axes that cannot rotate relative to the axes are connected to each other.
[0017] By adopting the technical solution of this utility model, three pairs of cams can be set on both sides of the middle fixed seat, resulting in high axial space utilization, good force balance on both sides of the middle fixed seat, and ensuring that friction surfaces can be provided on both sides of the middle fixed seat. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of an embodiment of the present utility model.
[0019] Figure 2 This is a top view of an embodiment of the present utility model.
[0020] Figure 3 This is an exploded view of the structure of an embodiment of the present utility model. Detailed Implementation
[0021] Referring to the accompanying drawings, the six-cam torque module in the hinge of the portable electronic product provided by this utility model includes a shaft 2 and a compression spring 3. The six-cam torque module is provided with a central fixing seat 100, and end fixing seats 101 and 102 are respectively provided on both sides of the central fixing seat. The central fixing seat 100 and the end fixing seats 101 and 102 are fixedly connected to the central support 200 of the hinge of the portable electronic product. The central fixing seat 100 and the end fixing seats 101 and 102 are provided with shaft holes, through which the shaft 2 passes, and the shaft 2 is positioned axially.
[0022] The six-cam torque module has three pairs of cams between the intermediate fixed seat 100 and the end fixed seats 101 and 102 on each side. From the intermediate fixed seat 100 to the end fixed seats 101 and 102, they are respectively the first cam pair 301, the second cam pair 302, and the third cam pair 303. Each cam is sleeved on the shaft 2. The compression spring 3 is located between the first cam pair and the second cam pair. The shaft 2 is also sleeved with a compression spring 3. The compression spring 3 presses the first cam pair 301, the second cam pair 302, and the third cam pair 303 together, so that the two sides of the intermediate fixed seat 100 press against the adjacent rotating parts sleeved on the shaft 2. Friction surfaces are provided on both sides of the intermediate fixed seat 100, which are labeled 11 and 12 respectively. Friction torque is generated when the adjacent rotating parts rotate.
[0023] The compression directions of the compression spring are opposite to those of the first cam pair 301 and the cam group consisting of the second cam pair 302 and the third cam pair 303. The third cam pair 303 increases the compression stroke of the compression spring 3 by the second cam pair 302. Under the combined action of the compression springs and the cam pairs on both sides of the intermediate fixed seat 100, the force on the intermediate fixed seat 100 is balanced. The control of the compression amount of the compression spring 3 by the first cam pair 301 and the cam group consisting of the second cam pair 302 and the third cam pair 303 is synchronized.
[0024] A preferred embodiment is that the cam pairs on both sides of the intermediate fixed seat 100 are symmetrical and identical (that is, the first cam pair 301 on the left and the first cam pair 301 on the right are symmetrical and identical, the second cam pair 302 on the left and the second cam pair 302 on the right are symmetrical and identical, and the third cam pair 303 on the left and the third cam pair 303 on the right are symmetrical and identical), and the compression springs 3 on both sides of the intermediate fixed seat 100 are identical.
[0025] The cam pair consists of a moving cam and a stationary cam. In the cam pair of this invention, the cam that can rotate relative to the fixed seat (intermediate fixed seat 100, end fixed seats 101, 102) is defined as the moving cam, and the cam that cannot rotate relative to the fixed seat is defined as the stationary cam. Reference numerals 411 and 412 represent the moving cam and stationary cam of the first cam pair, respectively; reference numerals 421 and 422 represent the moving cam and stationary cam of the second cam pair, respectively; and reference numerals 431 and 432 represent the moving cam and stationary cam of the third cam pair, respectively. Each moving cam and stationary cam may or may not slide on the shaft as needed. The stationary cams 412 and 422 in the first cam pair 301 and the second cam pair 302 can slide relative to the shaft 2, and the moving cams 421 and 431 in the second cam pair 302 and the third cam pair 303 can slide relative to the shaft 2.
[0026] One preferred approach is that, in the first cam pair 301, the moving cam 411 is located near the side of the intermediate fixed seat 100; in the first cam pair 301 and the second cam pair 302, the stationary cams 412 and 422 are located near the side of the compression spring 3; and in the third cam pair 303, the stationary cam 432 is located at the inner end of the end fixed seats 101 and 102. This achieves several technical benefits: (1) a friction fit can be formed between the back of the moving cam 411 of the first cam pair 301 and the side of the intermediate fixed seat 100; (2) the stationary cam can be directly used as a non-rotatable component to engage with both ends of the compression spring 3, which helps the spring work and saves parts; (3) the stationary cam 432 of the third cam pair 303 can be located on the end fixed seats 101 and 102, while the moving cams 421 and 431 of the second cam pair 302 and the third cam pair 303 can be located on both ends of the same component, thus improving the working effect of the cams while saving parts.
[0027] For the axial fixation of shaft 2, the shaft 2 can be axially positioned by setting limiting members 5 on the outer sides of the end fixing seats 101 and 102 on both sides, respectively, which are connected to the corresponding end fixing seats of shaft 2. The limiting members 5 can be retaining rings.
[0028] In this embodiment, the hinge is a dual-axis hinge with two shafts 2. There are connecting arms 6 on both sides of the hinge. The connecting arms on both sides are connected by a gear synchronous reverse transmission mechanism 7. The connecting arm 6 on the same side is set together with the moving cams 411, 421, and 431 respectively and moves synchronously. Furthermore, each connecting arm 6 on the same side is connected to the housing of the portable electronic product hinge on the same side.
[0029] As mentioned above, the hinge is a dual-axis hinge, equipped with two sets of cam torque modules. Furthermore, the cams on the two shafts 2 that cannot rotate relative to the shafts, i.e., the stationary cams, are connected to each other and cannot rotate relative to the shafts 2.
[0030] The above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the protection scope of the present utility model.
[0031] It should be noted that the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. The terms "installed," "set," "equipped with," "connected," "linked," and "sleeve" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0032] In the description of this utility model, it should be understood that the terms "one end," "the other end," "outer side," "inner side," "horizontal," "end," "length," "outer end," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this utility model. The terms "first" and "second" are also used only for the sake of brevity in description and do not indicate or imply relative importance.
Claims
1. A six-cam torque module in a hinge of a portable electronic product, comprising a shaft and a compression spring, characterized in that, The six-cam torque module is provided with a central fixed seat, and end fixed seats are provided on both sides of the central fixed seat. The central fixed seat and the end fixed seats are provided with shaft holes, through which the shaft passes and is positioned in the axial direction. The six-cam torque mold has three pairs of cams between the middle fixed seat and the end fixed seats on each side. From the middle fixed seat to the end fixed seat, they are the first cam pair, the second cam pair, and the third cam pair, respectively. Each cam is sleeved on the shaft. A compression spring is located between the first cam pair and the second cam pair. The compression spring presses the first cam pair, the second cam pair, and the third cam pair together, so that the two sides of the middle fixed seat press against the adjacent rotating parts sleeved on the shaft. The first cam pair and the cam group consisting of the second cam pair and the third cam pair compress the compression spring in opposite directions, and the third cam pair increases the compression stroke of the second cam pair on the compression spring.
2. The six-cam torque module in the hinge of a portable electronic product as described in claim 1, characterized in that, The first cam pair and the cam group consisting of the second and third cam pairs synchronize the control of the compression amount change of the compression spring.
3. The six-cam torque module in the hinge of a portable electronic product as described in claim 1, characterized in that, The cam pair consists of a moving cam that can rotate relative to the fixed base and a stationary cam that cannot rotate relative to the fixed base; the stationary cam in the second cam pair can slide relative to the shaft, and the moving cams in the second and third cam pairs can slide relative to the shaft.
4. The six-cam torque module in the hinge of a portable electronic product as described in claim 1, characterized in that, Limiting members that are connected to the shaft and correspond to the end fixing seats are respectively provided on the outer side of the end fixing seats on both sides to axially position the shaft.
5. The six-cam torque module in the hinge of a portable electronic product as described in claim 3, characterized in that, The connecting arms in the hinge are arranged together with the moving cam and move synchronously, and each connecting arm is connected to the housing of the portable electronic product hinge on its side.
6. The six-cam torque module in the hinge of a portable electronic product as described in claim 3, characterized in that, In the first cam pair, the moving cam is located on the side closer to the middle fixed seat; in the first cam pair and the second cam pair, the stationary cam is located on the side closer to the compression spring; in the third cam pair, the stationary cam is located at the inner end of the end fixed seat.
7. The six-cam torque module in the hinge of a portable electronic product as described in claim 6, characterized in that, A friction fit is formed between the back of the moving cam of the first cam pair and the intermediate fixed seat.
8. The six-cam torque module in the hinge of a portable electronic product as described in claim 1, characterized in that, The moving cams of the second cam pair and the second cam pair are located at both ends of the same component.
9. The six-cam torque module in the hinge of a portable electronic product as described in claim 1, characterized in that, The cam pairs on both sides of the intermediate fixed seat are symmetrical and identical, and the compression springs on both sides of the intermediate fixed seat are identical.
10. The six-cam torque module in the hinge of a portable electronic product as described in claim 1, characterized in that, The hinge is a dual-axis hinge, and is provided with two sets of the six-cam torque modules as described in any one of claims 1-8. Furthermore, the cams on the two axes that cannot rotate relative to the axes are connected to each other.