Constant-force connecting device and AR glasses

Abstract

The utility model provides a constant-force connecting device which is suitable for glasses legs. The constant-force connecting device comprises a first shell, a second shell and a connecting mechanism. The connecting mechanism is arranged between the first shell and the second shell, so that the second shell is movably connected to the first shell. The connecting mechanism comprises a movable assembly, a rotating shaft and a constant force spring. One end of the movable assembly and one end of the constant force spring are rotationally connected to the first shell through a rotating shaft. The other end of the movable assembly is connected to the second shell, and the other end of the constant force spring is connected to the movable assembly. By means of the movable assembly, the second shell rotates around the rotating shaft relative to the first shell. The second shell rotates around the rotating shaft in the first direction, and the constant-force spring constantly tends to drive the second shell to reset. The second shell rotates by different angles around the rotating shaft in the first direction, and the elastic force, acting on the second shell, of the constant-force spring is kept unchanged. The utility model further provides the AR glasses. The AR glasses are provided with the constant force connecting device.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic equipment, and in particular to a constant force connection device and AR glasses. Background Art

[0002] Augmented reality (AR) and virtual reality (VR) have become hot topics in the field of modern science and technology. With their unique interactive experience, they have shown broad application prospects in many fields such as education, entertainment, medical care, and military. Virtual reality (VR) usually requires wearing a VR helmet or glasses and using devices such as handles, gloves, or other controllers for interaction. Augmented reality (AR) can be interacted with through devices such as mobile phones, tablets, or AR glasses. Users can interact with virtual content through touch screens, gesture recognition, or voice control.

[0003] With the widespread use of AR / VR and other head-mounted devices, various forms of head-mounted products are constantly updated and iterated. AR glasses are widely favored by consumers because of their lightness, portability, and rich visual effects. However, AR devices on the market cannot well meet the needs of people with different head circumferences. Although some existing technical solutions propose solutions to meet different head circumferences by expanding the temples, the structure is relatively complex; and there is no solution to the problem that the larger the head circumference, the greater the pressure on the temples on the wearer, which cannot meet the comfort requirements of AR wearing.

[0004] Therefore, it is necessary to provide a constant force connection device that can adapt to different head circumferences and can ensure that the force applied by the temples to the human head is constant when people with different head circumferences are wearing the device, so as to meet the AR wearing comfort requirements. Utility Model Content

[0005] The purpose of the utility model is to provide a constant force connection device that can adapt to different head circumferences and can achieve constant force applied by the temples to the head of people with different head circumferences during wearing, so as to meet the AR wearing comfort requirements.

[0006] Another object of the present invention is to provide AR glasses that can adapt to different head circumferences and are comfortable to wear.

[0007] To achieve the above object, the utility model provides a constant force connection device suitable for temples, comprising:

[0008] a first shell;

[0009] a second shell;

[0010] A connecting mechanism is disposed between the first shell and the second shell, and the second shell is movably connected to the first shell by the connecting mechanism;

[0011] Among them, the connecting mechanism includes a movable component, a rotating shaft and a constant force spring, one end of the movable component and one end of the constant force spring are rotatably connected to the first shell via the rotating shaft, the other end of the movable component is connected to the second shell, and the other end of the constant force spring is connected to the other end of the movable component, and the second shell is rotated relative to the first shell around the rotating shaft by means of the movable component; the second shell rotates around the rotating shaft along the first direction, and the constant force spring has a tendency to drive the second shell to reset; the second shell rotates around the rotating shaft along the first direction at different angles, and the elastic force of the constant force spring acting on the second shell remains unchanged.

[0012] Compared with the prior art, the constant force connection device of the utility model is applicable to the temples of glasses, and can make the temples rotate at various angles, so that the glasses provided with the constant force connection device can be applicable to wearers of various head circumferences, and the force of the temples acting on the human head is constant, and the wearing is more comfortable. Specifically, the constant force connection device includes a first shell and a second shell, and a connecting mechanism is provided between the first shell and the second shell. The connecting mechanism includes a movable component, a rotating shaft and a constant force spring. One end of the movable component is connected to the first shell, and the other end of the movable component is connected to the second shell. The rotating shaft passes through the movable component and the constant force spring, and the two ends of the rotating shaft are connected to the first shell, and the other end of the constant force spring is connected to the other end of the movable component. The second shell is rotated relative to the first shell around the rotating shaft by the movable component, so that the temples can be folded for easy storage. The second shell can also be rotated relative to the first shell by the movable component to be applicable to wearers of various head circumferences. The second shell rotates along the first direction around the rotating shaft, and the constant force spring has a tendency to drive the second shell to reset. After wearing, the glasses are taken off, and the temples can be reset under the action of the constant force spring, which does not affect the next wearing. In addition, when the second shell rotates around the rotation axis in the first direction at different angles, the elastic force of the constant force spring acting on the second shell remains unchanged. Since the force of the constant force spring acting on the shell remains unchanged when the second shell rotates, the restoring force of the constant force spring remains constant. When people with different head circumferences wear the glasses, the force of the temples acting on the head also remains constant, making them more comfortable to wear. The constant force connection device of the utility model is suitable for the temples of glasses, so that the glasses can be suitable for wearers of various head circumferences, and the force of the temples acting on the human head is constant, making them more comfortable to wear.

[0013] Preferably, the movable component includes a base, one end of the base is located in the first shell, and the other end of the base is located in the second shell, the end of the base located in the first shell is provided with a first mounting portion for the rotating shaft to pass through, one end of the constant force spring is provided with an elastic portion for the rotating shaft to pass through, and a second mounting portion for installing the rotating shaft is provided in the first shell, the rotating shaft passes through the first mounting portion and the elastic portion, and both ends of the rotating shaft are installed in the two second mounting portions so that the base is rotatably connected to the first shell.

[0014] Preferably, the movable component further comprises a baffle, the baffle is provided with a clamping portion, a receiving space for receiving the baffle is provided on the base, the clamping portion is clamped with the base and the baffle is located in the receiving space.

[0015] Preferably, the baffle is also provided with a positioning groove that cooperates with the constant force spring, one end of the constant force spring is sleeved on the rotating shaft, and a positioning block is protruded from one end of the constant force spring that cooperates with the baffle, and the two ends of the positioning block are respectively installed in the two positioning grooves on both sides.

[0016] Preferably, both positioning grooves are provided with limiting grooves, and both ends of the positioning block are provided with limiting protrusions cooperating with the limiting grooves, so that the installation of the positioning block in the positioning groove is strengthened by the cooperation between the limiting protrusions and the limiting grooves.

[0017] Preferably, it further comprises a cover assembly, which covers the first shell and the second shell, so as to prevent the connecting mechanism from being separated from the second shell.

[0018] Preferably, the movable component also includes a fixing member, a first mounting hole and a second mounting hole are opened on the base, the first mounting hole is located on one side of the accommodating space, the second mounting hole is located on the other side of the accommodating space, and a third mounting hole is opened on the baffle. The fixing member passes through the first mounting hole, the third mounting hole and the second mounting hole in sequence, and the connection between the baffle and the base is reinforced by the fixing member.

[0019] Preferably, a first protrusion and two second protrusions are protruding from the second shell, the first protrusion limits the baffle from the bottom, and the two second protrusions limit the baffle from both sides, so as to prevent the baffle from detaching from the second shell.

[0020] Preferably, a first limit block is provided on the base, and a second limit block is provided on the first shell. The first limit block is provided on one side of the accommodating space close to the first mounting portion, the first limit block is located between the two second protrusions and one end of the first limit block abuts against the second limit block.

[0021] To achieve the other purpose mentioned above, the utility model also provides an AR glasses, including a frame and temples connected to each other, wherein the temples are provided with the above-mentioned constant force connection device, so that the temples can be rotated to different angles along a first direction by means of the constant force connection device, and the force acting on the human head when the temples are worn remains unchanged.

[0022] Compared with the prior art, the AR glasses of the utility model can rotate the temples at multiple angles relative to the frame for easy storage. In addition, since a constant force connection device is provided in the temples of the AR glasses, the AR glasses can be suitable for wearers of various head circumferences, and the force exerted by the temples on the human head is constant, making the wearer more comfortable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural exploded view of a constant force connection device provided in one embodiment of the utility model.

[0025] Figure 2 yes Figure 1 Partial structural diagram of the constant force connection device.

[0026] Figure 3 yes Figure 1 Structural diagram of the first shell.

[0027] Figure 4 yes Figure 1 Partial structural diagram of the second shell.

[0028] Figure 5 yes Figure 1 Structural diagram of the connecting mechanism.

[0029] Figure 6 yes Figure 5 Another angle of the structure.

[0030] Figure 7 yes Figure 5 Structural diagram of the middle base.

[0031] Figure 8 yes Figure 5 Structural diagram of the middle baffle.

[0032] Fig. 9 yes Figure 5 Structural diagram of the constant force spring.

[0033] Description of reference numerals:

[0034] 100. Constant force connection device;

[0035] 10. first housing; 11. first cavity; 12. second mounting portion; 13. second limiting block;

[0036] 20. second housing; 21. second cavity; 22. first protrusion; 23. second protrusion;

[0037] 30. Connecting mechanism; 31. Movable assembly; 311. Base; 3111. First mounting portion; 3112. Accommodating space; 3113. First mounting hole; 3114. Second mounting hole; 3115. First limiting block; 312. Baffle; 3120. Engaging portion; 3121. Bottom plate; 3122. Fixing plate; 3123. Third mounting hole; 3124. Positioning groove; 3125. Limiting groove; 313. Fixing member; 32. Constant force spring; 321. Elastic portion; 322. Positioning block; 323. Limiting convex portion; 33. Rotating shaft;

[0038] 40. Cover plate assembly; 41. Rotating part. DETAILED DESCRIPTION

[0039] In order to explain the technical content and structural features of the present invention in detail, further description will be given below in combination with the embodiments and the accompanying drawings.

[0040] See also Figure 1 and Figure 2 The utility model provides a constant force connection device 100, which is suitable for temples. The constant force connection device 100 includes a first shell 10, a second shell 20 and a connection mechanism 30. The connection mechanism 30 is arranged between the first shell 10 and the second shell 20, and the second shell 20 is movably connected to the first shell 10 by the connection mechanism 30. Among them, the connection mechanism 30 includes a movable component 31, a rotating shaft 33 and a constant force spring 32, and one end of the movable component 31 and one end of the constant force spring 32 are rotatably connected to the first shell 10 by the rotating shaft 33. The other end of the movable component 31 is connected to the second shell 20, and the other end of the constant force spring 32 is connected to the other end of the movable component 31. The second shell 20 is rotated relative to the first shell 10 around the rotating shaft 33 by the movable component 31. The second shell 20 rotates along the first direction around the rotating shaft 33, and the constant force spring 32 has a tendency to drive the second shell 20 to reset. The second housing 20 rotates around the rotating shaft 33 along the first direction at different angles, and the elastic force of the constant force spring 32 acting on the second housing 20 remains unchanged.

[0041] In this embodiment, the first shell 10 is provided with a hollow first cavity 11. The second shell 20 is provided with a hollow second cavity 21. The connecting mechanism 30 is provided between the first shell 10 and the second shell 20, and one end of the connecting mechanism 30 is located in the first shell 10, and the other end of the connecting mechanism 30 is located in the second shell 20. The second shell 20 is movably connected to the first shell 10 by the connecting mechanism 30, and the second shell 20 can be rotated relative to the first shell 10. A cover assembly 40 is also included, and the cover assembly 40 covers the first shell 10 and the second shell 20, and the cover assembly 40 is used to prevent the connecting mechanism 30 from being separated from the second shell 20. Of course, other limiting mechanisms can also be provided in the first shell 10 and the second shell 20 to ensure that the connecting mechanism 30 is stably placed in the first shell 10 and the second shell 20. Through the structure inside the second shell 20 and the cover assembly 40, it can be prevented that the connecting mechanism 30 is separated from the second shell 20 when driving the second shell 20 to rotate relative to the first shell 10. The cover assembly 40 is provided with a rotating portion 41 that can rotate with the second housing 20, so that the second housing 20 can rotate smoothly equivalent to the first housing 10. Among them, the connecting mechanism 30 includes a movable assembly 31, a rotating shaft 33 and a constant force spring 32. One end of the movable assembly 31 is located in the first cavity 11, and the other end of the movable assembly 31 is located in the second cavity 21. The rotating shaft 33 passes through one end of the movable assembly 31 and one end of the constant force spring 32 and is fixed in the first cavity 11. One end of the movable assembly 31 and one end of the constant force spring 32 are arranged in the first cavity 11 with the rotating shaft 33. The other end of the constant force spring 32 is connected to the other end of the movable assembly 31, and the second housing 20 is rotated relative to the first housing 10 around the rotating shaft 33 by the movable assembly 31. Specifically, the second housing 20 rotates along the rotating shaft 33 in the first direction through the movable assembly 31, and the constant force spring 32 always has a tendency to drive the second housing 20 to reset. The first direction is the direction in which the second housing 20 rotates outward along the first housing 10. After the wearers with different head circumferences wear the glasses, the second shell 20 rotates around the rotating shaft 33 in the first direction through the movable component 31 at different angles, but after taking off the glasses, the glasses feet can be reset to the initial position through the constant force spring 32. On the other hand, the second shell 20 rotates around the rotating shaft 33 in the first direction at different angles, and the elastic force of the constant force spring 32 acting on the second shell 20 remains unchanged. Since the constant force spring 32 is a spring, that is, a plane volute spring. The spring is a spring that is wound into a plane spiral shape. One end of the spring is fixed, and the material is subjected to a bending moment after the other end acts on the torque, resulting in bending elastic deformation, so that the spring is twisted in its own plane. The constant force spring 32 is constructed as a coiled belt of spring steel, so that the spring is relaxed when it is fully rolled up. When it is unfolded, the restoring force mainly comes from the belt part close to the roll. Since the geometry of this area remains almost unchanged when the spring is unfolded, the resultant force is almost constant.Therefore, when people with different head circumferences wear the glasses, although the lengths of the constant force spring 32 strap extensions are different, the restoring force remains constant, so when people with different head circumferences wear the glasses, the force of the temples acting on the head also remains constant.

[0042] Compared with the prior art, the constant force connection device 100 of the utility model is suitable for the temples of glasses, and can make the temples rotate at various angles, so that the glasses provided with the constant force connection device 100 can be suitable for wearers of various head circumferences, and the force of the temples acting on the human head is constant, and the wearing is more comfortable. Specifically, the constant force connection device 100 includes a first shell 10 and a second shell 20, a connecting mechanism 30 is arranged between the first shell 10 and the second shell 20, and the first shell 10 and the second shell 20 are also covered with a shell assembly. The connecting mechanism 30 includes a movable assembly 31, a rotating shaft 33 and a constant force spring 32. One end of the movable assembly 31 is located in the first cavity 11 of the first shell 10, and the other end of the movable assembly 31 is located in the second cavity 21 of the second shell 20. The rotating shaft 33 passes through the movable assembly 31 and the constant force spring 32, and the two ends of the rotating shaft 33 are fixed in the first cavity 11, and the other end of the constant force spring 32 is connected to the other end of the movable assembly 31. The second housing 20 is rotated relative to the first housing 10 around the rotating shaft 33 by means of the movable assembly 31, so that the temples can be folded for easy storage. The second housing 20 can also be rotated relative to the first housing 10 by means of the movable assembly 31 to be suitable for wearers of various head circumferences. The second housing 20 rotates along the first direction around the rotating shaft 33, and the constant force spring 32 has a constant tendency to drive the second housing 20 to reset. After wearing, the glasses are taken off, and the temples can be reset under the action of the constant force spring 32, without affecting the next wearing. In addition, the second housing 20 rotates different angles around the rotating shaft 33 along the first direction, and the elastic force of the constant force spring 32 acting on the second housing 20 remains unchanged. Since the force of the constant force spring 32 acting on the housing remains unchanged when the second housing 20 rotates, the restoring force of the constant force spring 32 remains constant. When people with different head circumferences wear it, the force of the temples acting on the head also remains constant, and it is more comfortable to wear. The constant force connection device 100 of the utility model is applicable to the temples of glasses, so that the glasses can be suitable for wearers with various head circumferences, and the force exerted by the temples on the human head is constant, making the glasses more comfortable to wear.

[0043] See also Figures 5 to 7In some optional embodiments, the movable component 31 includes a base 311, one end of the base 311 is located in the first shell 10, and the other end of the base 311 is located in the second shell 20. The end of the base 311 located in the first shell 10 is provided with a first mounting portion 3111 for the rotation shaft 33 to pass through, and the first shell 10 is provided with a second mounting portion 12 for mounting the rotation shaft 33. In addition, one end of the constant force spring 32 is provided with an elastic portion 321 for the rotation shaft 33 to pass through. The rotation shaft 33 passes through the first mounting portion 3111 and the elastic portion 321, and the two ends of the rotation shaft 33 are installed in the two second mounting portions 12 so that the base 311 is rotatably connected to the first shell 10. It can be understood that the two ends of the rotation shaft 33 are fixed in the two second mounting portions 12 of the first shell 10. When an external force acts on the second shell 20, the base 311 and the constant force spring 32 can rotate around the rotation shaft 33, thereby enabling the second shell 20 to rotate equivalent to the first shell 10.

[0044] See also Figures 5 to 9 In some optional embodiments, the movable assembly 31 further includes a baffle 312, which includes a bottom plate 3121 and a fixed plate 3122 in an integrated structure, and a clamping portion 3120 is provided between the bottom plate 3121 and the fixed plate 3122. A receiving space 3112 for receiving the baffle 312 is provided on the base 311, and the clamping portion 3120 is clamped on the base 311 and allows the baffle 312 to be located in the receiving space 3112. At the same time, the bottom plate 3121 protrudes out of the bottom surface of the base 311 so as to be able to cooperate with the first protrusion 22 at the bottom. Among them, a positioning groove 3124 is also provided on the baffle 312 for cooperating with the constant force spring 32, and the positioning groove 3124 is provided on the fixed plate 3122, and the positioning groove 3124 is connected to the edge of the fixed plate 3122, so that the positioning block 322 of the constant force spring 32 is placed in the positioning groove 3124. On the other hand, one end of the constant force spring 32 is sleeved on the rotating shaft 33, and the other end of the constant force spring 32 is set in the positioning groove 3124. Specifically, a positioning block 322 is protruded from one end of the constant force spring 32 that cooperates with the baffle 312, and the two ends of the positioning block 322 are respectively installed in the two positioning grooves 3124 on both sides. Figure 8As shown, both ends of the bottom plate 3121 are provided with fixing plates 3122, the two fixing plates 3122 are symmetrically arranged and both fixing plates 3122 are provided with positioning grooves 3124, and the positioning block 322 cooperates with the two positioning grooves 3124, so that the force is more uniform and the structure is more stable. Limiting grooves 3125 are also provided in the two positioning grooves 3124, and both ends of the positioning block 322 are also provided with limiting convex parts 323 that cooperate with the limiting grooves 3125, and the installation of the positioning block 322 in the positioning grooves 3124 is strengthened by the cooperation of the limiting convex parts 323 and the limiting grooves 3125. It can be understood that the cooperation of the limiting convex parts 323 and the limiting grooves 3125 can prevent the constant force spring 32 from being separated from the baffle 312, and the connection is more reliable and stable.

[0045] See also Figure 5 and Figure 6 In some optional embodiments, the movable assembly 31 further includes a fixing member 313, and a first mounting hole 3113 and a second mounting hole 3114 are provided on the base 311, the first mounting hole 3113 is located on one side of the accommodating space 3112, and the second mounting hole 3114 is located on the other side of the accommodating space 3112. A third mounting hole 3123 is provided on the baffle 312, and the third mounting hole 3123 is provided on both fixing plates 3122 of the baffle 312. There are two fixing members 313, and the two fixing members 313 symmetrically pass through the two sides of the base 311 to stably connect the baffle 312 to the base 311. Specifically, the fixing member 313 passes through the first mounting hole 3113, the third mounting hole 3123 and the second mounting hole 3114 in sequence, and the connection between the baffle 312 and the base 311 is reinforced by the fixing member 313.

[0046] See also Figures 4 to 6 In some optional embodiments, a first protrusion 22 and two second protrusions 23 are protrudingly provided in the second housing 20. The first protrusion 22 limits the baffle 312 from the bottom, and the two second protrusions 23 limit the baffle 312 from both sides. The first protrusion 22 and the two second protrusions 23 prevent the baffle 312 from sliding out of the second cavity 21 along the length direction of the second housing 20. The cover assembly 40 can prevent the baffle 312 from being separated from the second cavity 21 in the height direction of the second housing 20.

[0047] See also Figure 3 and Figures 5 to 7In some optional embodiments, a first limit block 3115 is provided on the base 311, and a second limit block 13 is provided on the first shell 10, the first limit block 3115 is provided on a side of the accommodating space 3112 close to the first mounting portion 3111, and the second limit block 13 is located at an end of the first cavity 11 close to the second shell 20. When the base 311 is installed, the first limit block 3115 is located between the two second protrusions 23 and one end of the first limit block 3115 abuts against the second limit block 13. When the second shell 20 rotates equivalent to the first shell 10, the first limit block 3115 can slide between the two second protrusions 23.

[0048] The utility model also provides an AR glasses, the AR glasses include a frame and temples that are connected to each other. The above-mentioned constant force connection device 100 is arranged in the temple, and the temple can be rotated to different angles along the first direction by means of the constant force connection device 100, and the force acting on the human head when the temple is worn remains unchanged. The AR glasses of the utility model have temples that can be rotated at multiple angles relative to the frame for easy storage. In addition, since the constant force connection device 100 is arranged in the temples of the AR glasses, the AR glasses can be suitable for wearers of various head circumferences, and the force of the temples acting on the human head is constant, making it more comfortable to wear.

[0049] like Figures 1 to 9As shown, the utility model provides an AR glasses, and also provides a constant force connection device 100. The constant force connection device 100 is suitable for the temples of the glasses, and is installed in the temples of the glasses so that the temples can rotate at various angles, so that the glasses provided with the constant force connection device 100 can be suitable for wearers of various head circumferences, and the force of the temples acting on the human head is constant, and it is more comfortable to wear. Among them, the constant force connection device 100 includes a first shell 10 and a second shell 20, a connection mechanism 30 is provided between the first shell 10 and the second shell 20, and the first shell 10 and the second shell 20 are also covered with a shell assembly. The connection mechanism 30 includes a base 311, a baffle 312, a rotating shaft 33, a constant force spring 32 and a fixing member 313. One end of the base 311 is located in the first cavity 11 of the first shell 10, and the other end of the base 311 is located in the second cavity 21 of the second shell 20. The baffle 312 is connected to the base 311 through a fixing member 313, and the baffle 312 is limited in the second cavity 21 of the second shell 20. The rotating shaft 33 passes through the movable assembly 31 and the constant force spring 32, and the two ends of the rotating shaft 33 are fixed in the first cavity 11, and the other end of the constant force spring 32 is connected to the baffle 312. The baffle 312 and the cover assembly 40 can prevent the base 311 from being separated from the second shell 20 during the activity. The second shell 20 is rotated relative to the first shell 10 around the rotating shaft 33 by the connecting mechanism 30, so that the temples can be folded for easy storage. The second shell 20 can also be rotated relative to the first shell 10 by the connecting mechanism 30 to be suitable for wearers of various head circumferences. The second shell 20 rotates along the first direction around the rotating shaft 33, and the constant force spring 32 always has a tendency to drive the second shell 20 to reset. After wearing, take off the glasses, the temples can be reset under the action of the constant force spring 32, and will not affect the next wear. In addition, the second shell 20 rotates around the rotating shaft 33 along the first direction at different angles, and the elastic force of the constant force spring 32 acting on the second shell 20 remains unchanged. Since the force of the constant force spring 32 acting on the shell remains unchanged when the second shell 20 rotates, the restoring force of the constant force spring 32 remains constant. When people with different head circumferences wear the glasses, the force of the temples acting on the head also remains constant, making them more comfortable to wear. The constant force connection device 100 of the utility model is installed in the temples of the glasses so that the glasses can be suitable for wearers of various head circumferences, and the force of the temples acting on the human head is constant, making them more comfortable to wear.

[0050] The above disclosure is only a preferred example of the present invention, which cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are all within the scope of the present invention.

Claims

1. A constant force connection device, suitable for temples, characterized in that: include: The first shell, The second shell, A connecting mechanism is disposed between the first shell and the second shell, and the second shell is movably connected to the first shell by means of the connecting mechanism; Wherein, the connecting mechanism includes a movable component, a rotating shaft and a constant force spring, one end of the movable component and one end of the constant force spring are rotatably connected to the first shell via the rotating shaft, the other end of the movable component is connected to the second shell, and the other end of the constant force spring is connected to the other end of the movable component, and the movable component is used to make the second shell rotate around the rotating shaft relative to the first shell; the second shell rotates around the rotating shaft in a first direction, and the constant force spring always has a tendency to drive the second shell to reset; the second shell rotates around the rotating shaft in the first direction at different angles, and the elastic force of the constant force spring acting on the second shell remains unchanged.

2. The constant force connection device according to claim 1, characterized in that: The movable component includes a base, one end of the base is located in the first shell, and the other end of the base is located in the second shell, the end of the base located in the first shell is provided with a first mounting portion for the rotating shaft to pass through, one end of the constant force spring is provided with an elastic portion for the rotating shaft to pass through, a second mounting portion for mounting the rotating shaft is provided in the first shell, the rotating shaft passes through the first mounting portion and the elastic portion, and both ends of the rotating shaft are installed in the two second mounting portions so that the base is rotatably connected to the first shell.

3. The constant force connection device according to claim 2, characterized in that: The movable assembly further includes a baffle, the baffle is provided with a clamping portion, a receiving space for receiving the baffle is provided on the base, the clamping portion is clamped on the base and enables the baffle to be located in the receiving space.

4. The constant force connection device according to claim 3, characterized in that: The baffle plate is also provided with a positioning groove that cooperates with the constant force spring. One end of the constant force spring is sleeved on the rotating shaft. A positioning block is protruded from one end of the constant force spring that cooperates with the baffle plate. The two ends of the positioning block are respectively installed in the two positioning grooves on both sides.

5. The constant force connection device according to claim 4, characterized in that: Limiting grooves are also provided in the two positioning grooves, and limiting convex parts cooperating with the limiting grooves are also provided at both ends of the positioning block, so that the installation of the positioning block in the positioning groove is reinforced by the cooperation between the limiting convex parts and the limiting grooves.

6. The constant force connection device according to claim 1, characterized in that: It also includes a cover plate assembly, which covers the first shell and the second shell, and prevents the connecting mechanism from being separated from the second shell by the cover plate assembly.

7. The constant force connection device according to claim 3, characterized in that: The movable component also includes a fixing member, a first mounting hole and a second mounting hole are opened on the base, the first mounting hole is located on one side of the accommodating space, and the second mounting hole is located on the other side of the accommodating space, and a third mounting hole is opened on the baffle. The fixing member passes through the first mounting hole, the third mounting hole and the second mounting hole in sequence, and the connection between the baffle and the base is reinforced by the fixing member.

8. The constant force connection device according to claim 3, characterized in that: A first protrusion and two second protrusions are protruding from the second shell. The first protrusion limits the baffle from the bottom, and the two second protrusions limit the baffle from both sides. The first protrusion and the two second protrusions can prevent the baffle from detaching from the second shell.

9. The constant force connection device according to claim 8, characterized in that: A first limit block is arranged on the base, and a second limit block is arranged on the first shell. The first limit block is arranged on a side of the accommodating space close to the first mounting portion. The first limit block is located between the two second protrusions and one end of the first limit block abuts against the second limit block.

10. An AR glasses, comprising a frame and temples connected to each other, characterized in that: The temple is provided with a constant force connection device as described in any one of claims 1-9, and the temple can be rotated to different angles along the first direction by means of the constant force connection device, and the force acting on the human head when the temple is worn remains unchanged.

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