Rotating shaft fixing structure

Abstract

The utility model relates to the technical field of head-mounted display equipment, and provides a rotating shaft fixing structure, which comprises a base and a rotating mechanism, a fixed sleeve is arranged on the base, and a sliding groove is formed in the fixed sleeve; the rotating mechanism comprises a rotating shaft sleeve and a limiting assembly, the fixing sleeve is sleeved with the rotating shaft sleeve, a limiting clamping groove is formed in the outer wall face of the rotating shaft sleeve, and the limiting clamping groove is located outside the sliding groove and communicates with the sliding groove to form a sliding channel; the limiting assembly comprises a movable rod, an elastic piece and a bayonet lock, the movable rod is inserted into the fixed sleeve, the elastic piece is located in the fixed sleeve, one end of the elastic piece is connected with the fixed sleeve, the other end of the elastic piece is connected with the movable rod, the bayonet lock is connected with the movable rod, and a part of the bayonet lock is located in the sliding channel. Through the cooperation of the limiting clamping grooves and the clamping pins, the stable overturning state can be kept under the impact of external force and strenuous movement, so that the stability of the structure can be effectively improved, and the overturning stability can be kept under the external acting force and strenuous movement.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of head-mounted display equipment, especially to a pivot fixing structure. BACKGROUND

[0002] Head-mounted display equipment is fixed on the head through wearing a fixing device, and in order to facilitate the adjustment of the angle and direction of the display equipment, a pivot mechanism is usually used to realize the adjustment of the display equipment.

[0003] At present, the rotation of the device is mainly realized by a pivot, and its fixation mainly relies on the damping force of the pivot. In the design process of the device, a pivot with a corresponding torque size can be selected, so that the device can be flipped, similar to the opening and closing of a notebook computer. Since the torsion of the pivot has a certain range limit, when the flipping force is too large, the product structure is easily damaged, and when the flipping force is too small, the device cannot be used normally. In addition, frequent use will cause the pivot to be damaged due to fatigue, and finally the product cannot be used normally, which cannot meet the use in the impact and intense exercise scenes. UTILITY MODEL CONTENTS

[0004] The utility model provides a pivot fixing structure to solve the defects that the pivot structure in the prior art is poor in convenience and poor in stability in the impact and intense exercise scenes.

[0005] The utility model provides a pivot fixing structure, which comprises a base and a rotating mechanism, a fixing sleeve is arranged on the base, a sliding groove is arranged on the fixing sleeve, the rotating mechanism comprises a rotating shaft sleeve and a limiting assembly, the rotating shaft sleeve is sleeved outside the fixing sleeve, a limiting clamping groove is arranged on the outer wall surface of the rotating shaft sleeve, the limiting clamping groove is located outside the sliding groove, the limiting clamping groove and the sliding groove are communicated and form a sliding channel, the limiting assembly comprises a movable rod, an elastic piece and a locking pin, the movable rod is inserted into the fixing sleeve, the elastic piece is located in the fixing sleeve, one end of the elastic piece is connected with the fixing sleeve, the other end of the elastic piece is connected with the movable rod, the locking pin is connected with the movable rod, part of the locking pin is located in the sliding channel, wherein the limiting clamping groove has an initial position and a flipping position, so that the locking pin is switched between the initial position and the flipping position when the rotating mechanism rotates, and the locking pin is used to limit the rotation of the rotating mechanism at the initial position and the flipping position.

[0006] According to the pivot fixing structure provided by the utility model, the rotating mechanism further comprises a rotating connecting seat, a connecting support is fixedly arranged on the rotating connecting seat, and the connecting support is connected with the rotating shaft sleeve.

[0007] According to the pivot fixing structure provided by the utility model, the rotating connecting seat, the connecting support and the rotating shaft sleeve are integrally formed.

[0008] According to the shaft fixing structure, the limiting clamping groove comprises a first slot section and a second slot section which are arranged along the axial direction, the first slot section and the second slot section are arranged at intervals in the circumferential direction, and a communication section is arranged between the first slot section and the second slot section, so that the clamping pin can be switched between the first slot section and the second slot section.

[0009] According to the shaft fixing structure, the sliding groove is arranged along the axial direction of the fixing sleeve, and the length of the sliding groove in the axial direction is greater than or equal to the maximum length of the limiting clamping groove in the axial direction.

[0010] According to the shaft fixing structure, the tail end of the movable rod is located outside the fixing sleeve, and the tail end of the movable rod is provided with a holding part.

[0011] According to the shaft fixing structure, a pair of connecting supports are arranged on the base, and the fixing sleeve is fixed between the pair of connecting supports.

[0012] According to the shaft fixing structure, one end of the fixing sleeve is connected to the connecting support through a fixing bolt, the other end of the fixing sleeve has an opening, and the movable rod is inserted into the fixing sleeve through the opening.

[0013] According to the shaft fixing structure, one end of the fixing sleeve is provided with a limiting step, and a matching limiting part is arranged on the connecting support, the limiting step and the matching limiting part are matched to limit the freedom degree of the fixing sleeve in the circumferential direction.

[0014] According to the shaft fixing structure, the elastic member comprises a spring, the spring is located in the fixing sleeve, one end of the spring is connected to the fixing sleeve, and the other end of the spring is connected to the movable rod.

[0015] The shaft fixing structure provided by the utility model can keep stable overturning state under external force impact and violent movement, thereby effectively improving the stability of the structure and keeping the stability of overturning under external force and violent movement. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0017] Figure 1 is the overall structure schematic diagram of the rotating shaft fixing structure provided by the utility model.

[0018] Figure 2 is the sectional structure schematic diagram of the rotating shaft fixing structure provided by the utility model.

[0019] Figure 3 is the explosion structure schematic diagram of the rotating shaft fixing structure provided by the utility model.

[0020] Figure 4 is the state schematic diagram of the rotating shaft fixing structure provided by the utility model from initial position switching to turnover position.

[0021] Figure 5 is the structure schematic diagram of the rotating mechanism in the rotating shaft fixing structure provided by the utility model.

[0022] Figure 6 is the structure schematic diagram of the fixed sleeve in the rotating shaft fixing structure provided by the utility model.

[0023] Figure 7 is the structure schematic diagram of the movable rod in the rotating shaft fixing structure provided by the utility model.

[0024] Reference signs:

[0025] 10, base; 11, fixed sleeve; 111, sliding groove; 112, limiting step; 12, connecting support; 20, rotating mechanism; 21, rotating shaft sleeve; 211, limiting clamping groove; 2111, first slot section; 2112, second slot section; 2113, communication section; 22, limiting assembly; 221, movable rod; 2211, bolt hole; 222, elastic piece; 223, clamping pin; 23, rotating connecting seat; 24, connecting support. DETAILED DESCRIPTION

[0026] In order that the object, technical scheme and advantages of the utility model are more clear, the technical scheme in the utility model will be described clearly and completely below in combination with the drawings in the utility model, obviously, the described embodiments are a part of embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0027] In the description of the embodiments of the utility model, it needs to be explained that, the orientation or position relation indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relation shown based on the drawings, and is only for the convenience of clarifying the embodiments of the utility model and simplifying the description, and therefore cannot be understood as a limitation on the embodiments of the utility model that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the embodiments of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0029] In the embodiments of the utility model, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0030] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the utility model. In the present application, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0031] The head-mounted device is used for wearing on the head of the human body, and in the related art, the rotation of the head-mounted device is realized by combining the damping structure with the rotating shaft.

[0032] But by the way of damping force, its rotation range is limited, so that in the rotation degree is too large or too small, it is difficult to achieve stable rotation effect, resulting in poor actual rotation operation experience. And because it is through the damping structure to realize rotation, which makes the stability is poor in the scene of external impact force or violent movement. For example, in the military scene, often need high strength movement and easy to be affected by external impact to lead to the change of turnover angle, or turnover failure, it is difficult to meet the use demand of military tactical environment.

[0033] For the problems in the related art, such as Figures 1-4 As shown in the figure, the embodiment provides a rotating shaft fixing structure, which comprises a base 10 and a rotating mechanism 20; the base 10 is provided with a fixed sleeve 11, and the fixed sleeve 11 is provided with a sliding groove 111; the rotating mechanism 20 comprises a rotating shaft sleeve 21 and a limiting assembly 22, the rotating shaft sleeve 21 is sleeved outside the fixed sleeve 11, the outer wall surface of the rotating shaft sleeve 21 is provided with a limiting clamping groove 211, the limiting clamping groove 211 is located outside the sliding groove 111, and the limiting clamping groove 211 and the sliding groove 111 are communicated and form a sliding channel; the limiting assembly 22 comprises a movable rod 221, an elastic member 222 and a pin 223, the movable rod 221 is inserted into the fixed sleeve 11, the elastic member 222 is located in the fixed sleeve 11, one end of the elastic member 222 is connected with the fixed sleeve 11, the other end of the elastic member 222 is connected with the movable rod 221, the pin 223 is connected with the movable rod 221, and part of the pin 223 is located in the sliding channel; wherein the limiting clamping groove 211 has an initial position A and a turnover position B, so that the pin 223 switches between the initial position A and the turnover position B when the rotating mechanism 20 rotates, and the pin 223 is used to limit the rotation of the rotating mechanism 20 at the initial position A and the turnover position B. The head-mounted device will move with the human body during use, which requires the rotating shaft to have a relatively stable structure at each position to avoid the problem of turnover failure or self-turnover during movement. In the embodiment, the limiting clamping groove 211 and the pin 223 are provided, so that the pin 223 can be locked at the initial position A and the turnover position B, thereby avoiding the problem of self-turnover during violent movement and improving the stability of the rotating shaft structure.

[0034] Specifically, the base 10 is a block structure, the base 10 is used for fixing on the main body of the head-mounted device, the rotating mechanism 20 is rotatably arranged on the base 10 through the fixed sleeve 11, so that the rotating mechanism 20 can rotate relative to the fixed sleeve 11, and the head-mounted device is connected to the rotating mechanism 20, thereby realizing the angle adjustment of the head-mounted device.

[0035] Further, the fixed sleeve 11 and the rotating shaft sleeve 21 are both circular tube structures, the hole diameter of the rotating shaft sleeve 21 is greater than the outer diameter of the fixed sleeve 11, so that the fixed sleeve 11 is located inside the rotating shaft sleeve 21, and the rotating shaft sleeve 21 can rotate around the fixed sleeve 11 under the action of an external force, and the position is locked by the bayonet 223, avoiding rotation of the rotating mechanism 20 under severe motion or external action.

[0036] As shown in Figure 2 , Figure 4 , Figure 6 , the fixed sleeve 11 has a hollow structure inside, which can be used for assembly of the limiting assembly 22, that is, the elastic member 222 and the movable rod 221 are arranged, and different positions are locked by cooperation of the limiting assembly 22 and the limiting clamping groove 211, thereby improving the stability of the structure in a static state.

[0037] It can be understood that when the rotating shaft is in a static position, the stability of the rotating shaft structure needs to be ensured to avoid self-turning and other conditions under external force, and the bayonet 223 is fixedly connected to the movable rod 221 in the embodiment, the bayonet 223 can be located in the sliding channel, and the rotating shaft can be switched between the initial position A and the overturning position B, thereby achieving locking in the initial position A and the overturning position B, avoiding self-rotation after overturning, and improving the stability of the structure.

[0038] In a specific embodiment, the elastic member 222 includes a spring, the spring is located in the fixed sleeve 11, one end of the spring is connected to the fixed sleeve 11, and the other end of the spring is connected to the movable rod 221. The movable rod 221 is inserted into the fixed sleeve 11 by the spring, and the bayonet 223 can be locked by the spring, avoiding rotation under external impact and severe motion, and improving the stability of the structure.

[0039] It can be understood that part of the body of the bayonet 223 is located in the limiting clamping groove 211, the bayonet 223 abuts against the groove wall of the limiting groove under the action of the spring, so that the rotation of the rotating shaft sleeve 21 can be avoided in a static position (i.e. the initial position A and the overturning position B), thereby improving the stability of the structure.

[0040] As shown in Figure 7 , specifically, a bolt hole 2211 is formed in the rod body of the movable rod 221, and the bayonet 223 is threadedly connected in the bolt hole 2211, thereby realizing connection of the bayonet 223 and the movable rod 221.

[0041] In some embodiments, the rotation mechanism 20 further includes a rotation connection base 23, on which a connection bracket 24 is fixedly mounted. The connection bracket 24 is connected to the rotation sleeve 21. The provision of the rotation connection base 23 allows the head-mounted display device to be connected to the rotation connection base 23, thereby driving the head-mounted display device to rotate when the rotation mechanism 20 rotates.

[0042] It can be understood that the rotating connecting seat 23 is used to connect the head display device, and the connecting bracket 24 is used to connect the rotating shaft sleeve 21 with the rotating connecting seat 23, so that it can be applied to the wearable device to achieve the connection of the overall structure.

[0043] In a specific configuration, the rotating connecting seat 23, the connecting bracket 24 and the rotating shaft sleeve 21 are integrally formed. The integrally formed configuration can improve the overall structural strength and enhance the stability of the structure.

[0044] Specifically, the rotating connecting seat 23, the connecting bracket 24 and the rotating shaft sleeve 21 are integrally formed of 6061 aluminum alloy, which is light in weight and high in strength. By limiting the material, the overall weight is made lighter.

[0045] Furthermore, the base 10 is also constructed from 6061 aluminum alloy, resulting in high strength and lightweight construction. The stopper assembly 22 and fixed sleeve 11 are made from 304 stainless steel, and the spring is made from 65Mn spring steel. This limited material selection for the stopper assembly 22 and fixed sleeve 11 enhances their durability. The high manganese content of 65Mn steel significantly improves its strength and hardness, making it suitable for withstanding high loads and intense wear. Furthermore, the relatively low cost of 65Mn steel helps control the cost of the shaft structure.

[0046] According to some examples provided by the present invention, such as Figure 4 、 Figure 5 As shown, the limiting slot 211 includes a first slot section 2111 and a second slot section 2112, which are axially arranged and spaced apart from each other in the circumferential direction. A connecting section 2113 is provided between the first slot section 2111 and the second slot section 2112 to enable the latch 223 to switch between the first slot section 2111 and the second slot section 2112. When the rotating shaft structure is in a static position, it is necessary to maintain structural stability. In this embodiment, the provision of the first slot section 2111 and the second slot section 2112 allows the latch 223 to be locked in the static position, thereby achieving adjustment of a preset rotation angle and improving overall stability.

[0047] The first slot section 2111 and the second slot section 2112 can be multiple, that is, other slots can be provided between the first slot section 2111 and the second slot section 2112 to realize the setting of multiple slot sections, thereby realizing the setting of different rotation angles. The central angle between the axis of the first slot section 2111 and the axis of the second slot section 2112 is between 1° and 180°. Specifically, the central angle between the axis of the first slot section 2111 and the axis of the second slot section 2112 is 180°, and a third slot section can be provided between the first slot section 2111 and the second slot section 2112, so that the axis of the third slot section is 90° or other angles with the axis of the first slot section 2111. That is, the setting of the slot section can be multiple, and multiple slot sections can have multiple angle selections, thereby realizing the limitation of different rotation angles.

[0048] As shown in Figure 5 , the first slot section 2111, the second slot section 2112 and the communication section 2113 form a generally U-shaped notch structure. The end position of the first slot section 2111 is the initial position A, and the end position of the second slot section 2112 is the flip position B. When the rotating shaft sleeve 21 rotates, the catch pin 223 can be switched from the initial position A to the flip position B, and the spring action keeps the position stable, thereby improving the stability of the rotating structure.

[0049] In particular, when flipping, as shown in Figure 4 , Figure 5 , the movable rod 221 is pushed by external force to move axially along the fixed sleeve 11 (towards the inside of the fixed sleeve 11), the catch pin 223 moves with the movement of the movable rod 221, and finally moves from the end of the first slot section 2111 (i.e. the initial position A) to the communication section 2113. Then rotate the rotating shaft sleeve 21, so that the catch pin 223 moves along the communication section 2113 to pass through the first slot section 2111 into the second slot section 2112. At this time, the movable rod 221 rebounds under the action of the spring, thereby driving the catch pin 223 into the end of the second slot section 2112 (i.e. the flip position B), realizing flipping and limiting, thereby preventing the rotation of the rotating shaft sleeve 21 and improving the stability of the structure. Similarly, when returning from the flip position B to the initial position A, the above flipping operation is performed, thereby realizing flip adjustment.

[0050] In some embodiments, as shown in Figure 6As shown, the sliding groove 111 is arranged along the axial direction of the fixed sleeve 11, and the length of the sliding groove 111 in the axial direction is greater than or equal to the maximum length of the limiting clamping groove 211 in the axial direction. When the rotating mechanism 20 rotates, the catch 223 needs to switch between the initial position A and the flipped position B. In this embodiment, the length of the sliding groove 111 is greater than the length of the limiting clamping groove 211, so that the catch 223 can move axially along the sliding groove 111 to the communication section 2113, thereby realizing switching between the two positions.

[0051] It can be understood that, through the arrangement of the sliding groove 111 and the limiting clamping groove 211, the overall operation is more convenient and can be quickly operated. Since the position of the second groove section 2112 is determined, the rotation angle is determined, so that the rotation is quick and the position stability is higher.

[0052] In some embodiments, the tail end of the movable rod 221 is located outside the fixed sleeve 11, and the tail end of the movable rod 221 is provided with a holding part. The arrangement of the holding part can facilitate manual application of external force and facilitate manual holding.

[0053] It can be understood that, when flipping, the movable rod 221 needs to be manually pushed, so that the catch 223 slides along the sliding groove 111 to the communication section 2113, and the initial position A and the flipped position B can be switched through the communication section 2113, thereby improving the convenience of operation.

[0054] In specific arrangement, the holding part includes a columnar holding block, and the diameter of the holding block is greater than the diameter of the whole movable rod 221, so that the holding block partially protrudes from the movable rod 221, facilitating manual holding.

[0055] According to some embodiments of the present application, a pair of connecting supports 12 are arranged on the base 10, and the fixed sleeve 11 is fixedly arranged between the pair of connecting supports 12. The connecting supports 12 protrude from the surface of the base 10, so that the fixed sleeve 11 has a certain distance from the base 10, so that the fixed sleeve 11 and the base 10 have a rotation space, so that the rotating shaft sleeve 21 can freely rotate around the fixed sleeve 11.

[0056] Specifically, the connecting supports 12 are provided with mounting holes, and the two ends of the fixed sleeve 11 are mounted on the connecting supports 12, and the connecting supports 12 are integrally formed with the base 10, so as to improve the structural strength of the whole.

[0057] In a specific embodiment, one end of the fixed sleeve 11 is connected to the connecting support 12 through a fixed bolt, the other end of the fixed sleeve 11 has an opening, and the movable rod 221 is inserted into the fixed sleeve 11 through the opening. One end of the fixed sleeve 11 is provided with a threaded hole, and the end of the fixed sleeve 11 provided with the threaded hole is arranged in the mounting hole and is fixedly connected through the fixed bolt, so as to realize stable mounting of the fixed sleeve 11.

[0058] It can be understood that the movable rod 221 needs to move axially in the fixed sleeve 11, and in the embodiment, the pressing movement of the movable rod 221 can be realized through the opening, so that the catch pin 223 can slide in the sliding groove 111 and the limiting clamping groove 211, thereby realizing the limiting of the position.

[0059] In some embodiments, as shown in Figure 3 , Figure 6 The fixed sleeve 11 is provided with a limiting step 112 at one end, and a matching limiting part is arranged on the connecting support 12, the limiting step 112 and the matching limiting part are matched to limit the freedom in the circumferential direction of the fixed sleeve 11. When the rotating shaft sleeve 21 rotates, it is necessary to prevent the fixed sleeve 11 from rotating, and in the embodiment, the limiting step 112 and the limiting part are matched to realize the limiting in the circumferential direction, thereby avoiding the rotation of the fixed sleeve 11 and improving the stability of the structure.

[0060] Specifically, the limiting step 112 makes the cross section of the end of the fixed sleeve 11 in a D-shaped structure, and the D-shaped structure and the limiting part are matched to prevent the fixed sleeve 11 from rotating, thereby affecting the stability of the rotating shaft structure.

[0061] Through the description of the above embodiments, those skilled in the art can clearly understand that in each embodiment, the quick clamping is realized through the cooperation of the catch pin 223 and the limiting clamping groove 211, the stability of the rotating shaft fixing structure in the static position is improved, and the external impact and violent movement can be effectively resisted. Further, through the setting of the elastic member 222, the movable rod 221 can automatically rebound, thereby making the operation more convenient, and further improving the stability in the static position.

[0062] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A rotating shaft fixing structure, characterized in that: include: A base, wherein the base is provided with a fixing sleeve, and the fixing sleeve is provided with a sliding groove; A rotating mechanism, comprising a rotating sleeve and a limiting assembly, wherein the rotating sleeve is sleeved on the outside of the fixed sleeve, and a limiting groove is provided on the outer wall surface of the rotating sleeve, wherein the limiting groove is located outside the slide groove, and the limiting groove and the slide groove are connected to form a sliding channel; The limiting assembly includes a movable rod, an elastic member, and a bayonet, wherein the movable rod is inserted into the fixed sleeve, the elastic member is located in the fixed sleeve, and one end of the elastic member is connected to the fixed sleeve, and the other end of the elastic member is connected to the movable rod, and the bayonet is connected to the movable rod, and a portion of the bayonet is located in the sliding channel; The limiting slot has an initial position and a flip position, so that the pin switches between the initial position and the flip position when the rotating mechanism rotates, and the pin is used to limit the rotation of the rotating mechanism at the initial position and the flip position.

2. The rotating shaft fixing structure according to claim 1, characterized in that: The rotating mechanism further comprises a rotating connecting seat, on which a connecting bracket is fixedly provided, and the connecting bracket is connected to the rotating shaft sleeve.

3. The rotating shaft fixing structure according to claim 2, characterized in that: The rotating connecting seat, the connecting bracket and the rotating shaft sleeve are integrally formed.

4. The rotating shaft fixing structure according to claim 1, characterized in that: The limiting slot includes a first slot segment and a second slot segment opened along the axial direction, the first slot segment and the second slot segment are arranged at intervals in the circumferential direction, and a connecting segment is opened between the first slot segment and the second slot segment so that the pin can switch between the first slot segment and the second slot segment.

5. The rotating shaft fixing structure according to claim 4, characterized in that: The sliding groove is arranged along the axial direction of the fixing sleeve, and the axial length of the sliding groove is greater than or equal to the maximum axial length of the limiting slot.

6. The rotating shaft fixing structure according to claim 1, characterized in that: The tail end of the movable rod is located outside the fixed sleeve, and a gripping portion is provided at the tail end of the movable rod.

7. The rotating shaft fixing structure according to claim 1, characterized in that: A pair of connecting supports are provided on the base, and the fixing sleeve is fixedly arranged between the pair of connecting supports.

8. The rotating shaft fixing structure according to claim 7, characterized in that: One end of the fixing sleeve is connected to the connecting support through a fixing bolt, and the other end of the fixing sleeve has an opening, and the movable rod is inserted into the fixing sleeve through the opening.

9. The rotating shaft fixing structure according to claim 7, characterized in that: A limiting step is provided at one end of the fixing sleeve, and a matching limiting portion is correspondingly provided on the connecting support. The limiting step cooperates with the matching limiting portion to limit the circumferential freedom of the fixing sleeve.

10. The rotating shaft fixing structure according to claim 1, wherein: The elastic member includes a spring, and the spring is located in the fixing sleeve. One end of the spring is connected to the fixing sleeve, and the other end of the spring is connected to the movable rod.

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