Cam torsion module in portable electronic product hinge
By employing a combination design of first and second cam pairs and equivalent cam pairs in the hinge of portable electronic products, the problems of axial space occupation and uneven friction surfaces are solved, achieving better force balance and structural reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU AMPHENOL PHOENIX TELECOM PARTS
- Filing Date
- 2025-04-27
- Publication Date
- 2026-05-12
AI Technical Summary
Existing hinges for portable electronic products tend to occupy axial space and affect structural reliability when increasing rotational resistance and locking force, especially due to uneven friction surfaces on both sides of the mounting base.
The design employs a combination of first and second cam pairs and an equivalent cam pair. The cam pairs are pressed against both sides of the fixed seat by compression springs, and the axial force is counteracted by the internal compression spring of the equivalent cam, ensuring that both sides of the fixed seat provide friction surfaces and achieve force balance.
Without increasing the axial space, the number of cam pairs on both sides of the fixed seat was increased, ensuring balanced friction surfaces, improving structural reliability and rotational resistance, and reducing wear after long-term use.
Smart Images
Figure CN224229080U_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 a very effective solution to improve rotational resistance and locking force. However, traditional solutions can only address this by increasing the number of mounting brackets, placing a pair of cams and a pair of friction surfaces on each side of the mounting bracket. But increasing the number of mounting brackets occupies more axial space. If more pairs of cams are added to the side closer to the main structure without adding mounting brackets, the axial output of the springs on the left and right sides of the mounting bracket will differ too much, affecting the reliability of the structure even after long-term use. In some structures, to minimize this impact, it is necessary to sacrifice one side of the friction surface. Utility Model Content
[0003] The purpose of this invention is to provide a cam torque module for hinges in portable electronic products, achieving a better balance in terms of axial space occupation, number of cam groups, number of friction surfaces, and axial forces on both sides of the fixed seat. To this end, this invention adopts the following technical solution:
[0004] A cam torque module in the hinge of a portable electronic product includes a fixed seat and a shaft. The fixed seat has a shaft hole through which the shaft passes. The cam torque module is characterized by having a first cam pair and a second cam pair. The first cam pair and the second cam pair are located outside a first side and outside a second side of the fixed seat, respectively, and are sleeved on the shaft. The cam torque module is also equipped with a compression spring, a first side limiter, and a second side limiter. The compression spring, the first cam pair, the fixed seat, and the second cam pair are located between the first side limiter and the second side limiter. The compression spring presses the first cam pair and the second cam pair together, and the two sides of the fixed seat press against adjacent rotating parts sleeved on the shaft.
[0005] The compression spring is located outside the first side of the fixed seat. One of the cams in the second cam pair is an equivalent cam. The equivalent cam has two pairs of internal cams inside, and an equivalent cam internal compression spring is set between the two pairs of internal cams. The internal cams located at both ends of the equivalent cam internal compression spring are pressed together by the second side of the fixed seat and the second side limit. The compression directions of the two pairs of internal cams on the equivalent cam internal compression spring are opposite.
[0006] Based on the above technical solutions, the present invention may also adopt the following further technical solutions, or combine these further technical solutions:
[0007] The two pairs of internal cams control the change in compression of the internal compression spring of the equivalent cam synchronously; the two pairs of internal cams control the compression of the internal compression spring of the equivalent cam in the same magnitude.
[0008] 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.
[0009] 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.
[0010] In the first cam alignment, the moving cam is closer to the fixed seat side. In the second cam alignment, the cam that cooperates with the equivalent cam is the stationary cam. In the equivalent cam, the inner cam closer to the fixed seat is aligned, and the moving cam is closer to the fixed seat side.
[0011] In the equivalent cam, the inner cam that is away from the fixed seat is aligned, and the back of the cam that is away from the fixed seat is provided with a cam surface that cooperates with the equivalent cam.
[0012] In the equivalent cam, the inner cam that is far from the fixed seat is a moving cam that can rotate relative to the fixed seat, and the cam that cooperates with the equivalent cam is a stationary cam that cannot rotate relative to the fixed seat.
[0013] The first limit and the second limit are respectively sleeved on the shaft.
[0014] The portable electronic product has a support structure at the end of the shaft located outside the second side of the fixed base.
[0015] The hinge is a dual-axis hinge, equipped with two sets of any of the above-mentioned cam torque modules, and the cams on the two axes that cannot rotate relative to the axes are connected to each other.
[0016] By adopting the technical solution of this utility model, more cam pairs can be set on one side of the fixed seat, while taking into account the balance of axial force values on both sides of the fixed seat. At the same time, it can ensure that friction surfaces are provided on both sides of the fixed seat. More cam pairs can be installed on one fixed seat. Under the condition of the same number of cam pairs, the axial space requirement is low, and it ensures that friction surfaces are provided on both sides of the fixed seat, and the balance of axial force is also improved. Attached Figure Description
[0017] Figure 1 This is a top view of an embodiment of the present utility model.
[0018] Figure 2 This is a cross-sectional view of an embodiment of the present utility model.
[0019] Figure 3 This is an exploded view of the structure of an embodiment of the present utility model. Detailed Implementation
[0020] Referring to the accompanying drawings, the cam torque module in the hinge of the portable electronic product provided by this utility model includes a fixed base 1 and a shaft 2, wherein the fixed base is fixedly connected to the central support 100 of the hinge of the portable electronic product. The fixed seat 1 is provided with a shaft hole, and the shaft 2 passes through the shaft hole. The cam torque module is provided with a first cam pair 201 and a second cam pair 202. The first cam pair 201 and the second cam pair 202 are located on the first side outside and the second side outside of the fixed seat 1, respectively, and are sleeved on the shaft 2. The cam torque module is provided with a compression spring 3, a first side limit 41, and a second side limit 42. The compression spring 3 is also sleeved on the shaft 2. The compression spring 3, the first cam pair 201, the fixed seat 1, and the second cam pair 202 are located between the first side limit 41 and the second side limit 42. The compression spring 3 presses the first cam pair 201 and the second cam pair 202 together, so that the two sides of the fixed seat press against the adjacent rotating parts sleeved on the shaft. Friction surfaces 11 and 12 are provided on both sides of the fixed seat 1, and friction torque is generated when the adjacent rotating parts rotate. Both the first side limiter 41 and the second side limiter 42 can be limiters sleeved on the shaft 2, and their back sides are respectively limited by the snap ring 21 connected to the shaft 2 and the structure on the central bracket 100 of the portable electronic product.
[0021] 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 base 1 is defined as the moving cam, and the cam that cannot rotate relative to the fixed base 1 is defined as the stationary cam. The moving cam and the stationary cam can slide on the shaft or not slide as needed. The first cam pair 201 consists of a moving cam 2011 and a stationary cam 2012.
[0022] The compression spring 3 is located outside the first side of the fixed base 1. One of the cams in the second cam pair 202 is an equivalent cam 2021. The equivalent cam 2021 and cam 2022 cooperate to form the second cam pair. The equivalent cam has two pairs of internal cams inside, namely an internal cam pair composed of a moving cam 51 and a stationary cam 52, and an internal cam pair composed of a stationary cam 53 and a moving cam 54. An equivalent cam internal compression spring 50 is provided between two pairs of internal cams. The internal cams located at both ends of the equivalent cam internal compression spring 50 are pressed together by the second side of the fixed seat 1 and the second side limit 42. The compression directions of the two pairs of internal cams on the equivalent cam internal compression spring are opposite. In this way, at least part of the force can be canceled out, and ideally, the axial component force output of the equivalent cam internal compression spring 50 can be completely canceled out. The internal compression spring 50 of the equivalent cam 2021 only acts inside the equivalent cam 2021. The equivalent cam 2021 provides two more pairs of cams while using the same fixed seat 1. Friction surfaces 11 and 12 can still be provided on both sides of the fixed seat 1.
[0023] The two pairs of internal cams are synchronized in controlling the change of compression amount of the internal compression spring of the equivalent cam; the two pairs of internal cams have the same amount of compression of the internal compression spring of the equivalent cam, that is, preferably, the cam surfaces of the two pairs of internal cams are the same, only the position order of the moving cam and the stationary cam on the shaft 2 is reversed.
[0024] 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 2101, 51, and 54 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 its side.
[0025] In the first cam pair 201, the moving cam 2011 is aligned with the side of the fixed seat 1 to form a friction fit. In the second cam pair 202, the cam that mates with the equivalent cam 2021, namely the cam 2022, is the stationary cam. In the equivalent cam 2021, the inner cam aligned with the fixed seat 1, and the moving cam 51 is aligned with the side of the fixed seat 1 to form a friction fit.
[0026] In the equivalent cam 2021, the inner cams away from the fixed seat 1 are aligned, and the back of the cam away from the fixed seat 1, i.e., the moving cam 54, is provided with a cam surface 2020 that cooperates with the cam 2022 that cooperates with the equivalent cam. The cam 2022 is a stationary cam.
[0027] The portable electronic product provides a support structure 101, such as a shaft hole, at the end of the shaft 2 outside the second side of the fixing base 1 to provide additional support for the shaft on this side. The support structure 101 is provided on the central bracket 100.
[0028] As mentioned above, the hinge is a dual-axis hinge, equipped with two sets of the aforementioned 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.
[0029] 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.
[0030] 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.
[0031] 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 cam torque module in a hinge of a portable electronic product, comprising a fixed base and a shaft, wherein the fixed base has a shaft hole through which the shaft passes, characterized in that, The cam torque module is provided with a first cam pair and a second cam pair. The first cam pair and the second cam pair are respectively located outside the first side and the second side of the fixed seat and sleeved on the shaft. The cam torque module is provided with a compression spring, a first side limit and a second side limit. The compression spring, the first cam pair, the fixed seat and the second cam pair are located between the first side limit and the second side limit. The compression spring presses the first cam pair and the second cam pair together, and makes the two sides of the fixed seat press against the adjacent rotating parts sleeved on the shaft. The compression spring is located outside the first side of the fixed seat. One of the cams in the second cam pair is an equivalent cam. The equivalent cam has two pairs of internal cams inside, and an equivalent cam internal compression spring is set between the two pairs of internal cams. The internal cams located at both ends of the equivalent cam internal compression spring are pressed together by the second side of the fixed seat and the second side limit. The compression directions of the two pairs of internal cams on the equivalent cam internal compression spring are opposite.
2. The cam torque module in the hinge of a portable electronic product as described in claim 1, characterized in that, The two pairs of internal cams control the change in compression of the internal compression spring of the equivalent cam synchronously; the two pairs of internal cams control the compression of the internal compression spring of the equivalent cam in the same magnitude.
3. The 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.
4. The 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.
5. The cam torque module in the hinge of a portable electronic product as described in claim 3, characterized in that, In the first cam alignment, the moving cam is closer to the fixed seat side. In the second cam alignment, the cam that cooperates with the equivalent cam is the stationary cam. In the equivalent cam, the inner cam closer to the fixed seat is aligned, and the moving cam is closer to the fixed seat side.
6. The cam torque module in the hinge of a portable electronic product as described in claim 1, characterized in that, In the equivalent cam, the inner cam that is away from the fixed seat is aligned, and the back of the cam that is away from the fixed seat is provided with a cam surface that cooperates with the equivalent cam.
7. The cam torque module in the hinge of a portable electronic product as described in claim 1, characterized in that, In the equivalent cam, the inner cam that is far from the fixed seat is a moving cam that can rotate relative to the fixed seat, and the cam that cooperates with the equivalent cam is a stationary cam that cannot rotate relative to the fixed seat.
8. The cam torque module in the hinge of a portable electronic product as described in claim 1, characterized in that, The first side limit and the second side limit are respectively sleeved on the shaft.
9. The cam torque module in the hinge of a portable electronic product as described in claim 1, characterized in that, The portable electronic product has a support structure at the end of the shaft located outside the second side of the fixed base.
10. The 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 cam torque modules as described in any one of claims 1-9. Furthermore, the cams on the two axes that cannot rotate relative to the axes are connected to each other.