Corner positioning structure utilizing inner and outer tooth clamping

Abstract

The utility model discloses a corner positioning structure utilizing inner and outer teeth for clamping, which comprises a fixing piece arranged on a bottom plate, the fixing piece is connected with an axis piece, and the axis piece can linearly slide on the fixing piece along the axis of the axis piece; a rotating part is connected to the axis part in a sleeving mode, clamping connection can be formed between the rotating part and the axis part so as to limit rotation of the rotating part, and after the clamping relation is relieved, the rotating part can rotate relative to the axis part; a spring is arranged on the axis part in a sleeving mode, and the spring drives the axis part to slide after the rotating angle of the rotating part is adjusted, so that the axis part and the rotating part are clamped. According to the utility model, the purposes of improving the supporting stability, simplifying the position control of supporting points and avoiding the scattering phenomenon during lifting can be achieved through the mutual clamping and limiting of the axis part and the rotating part.

Description

Technical Field

[0001] The utility model relates to the field of corner support structures, in particular to a corner positioning structure utilizing internal and external teeth for positioning. Background Art

[0002] Corner support mechanisms usually have one or more fulcrums that allow the bracket to rotate within a specific angle range. They are often used in the field of bracket design to provide support and stability. Corner support mechanisms are commonly found in the design of folding tables and chairs, allowing the tables and chairs to be unfolded when needed and folded easily to save space when not needed. Folding stools, countertops, clothes drying racks and other household items often use corner support mechanisms to flexibly switch between different states; some doors and windows use corner support mechanisms, allowing them to be opened at specific angles, providing more flexible ventilation and use experience; outdoor leisure furniture such as folding chairs and reclining chairs can also use corner support mechanisms to make them easier to store and carry in outdoor spaces; some electronic equipment supports, such as tablet computer stands and mobile phone stands, often use corner support mechanisms to provide different viewing angles and height adjustments; at the same time, luggage can use corner support mechanisms so that the luggage can stand stably without additional support. These examples highlight the practical application of corner support mechanisms in daily life, bringing convenience and flexibility to our lives. This structure not only makes household items easier to use and store, but also provides more options for outdoor activities, leisure and work.

[0003] In daily life, the demand for support mechanisms is increasing, especially in furniture design, folding equipment and products with adjustable angles. However, existing structures have some problems when lifting or folding these structures, such as instability, difficulty in controlling the position of the support points, or scattering when lifting. In view of this, this application is specially proposed. Utility Model Content

[0004] The utility model aims to provide a corner positioning structure using internal and external teeth to solve the problems in the prior art of unstable support, difficult to control the position of the support point, or easy scattering when lifting.

[0005] The utility model is implemented by the following technical solutions:

[0006] An embodiment of the utility model provides an angle positioning structure utilizing internal and external teeth for locking, comprising a fixed part mounted on a base plate, the fixed part being connected to an axial part, the axial part being able to slide linearly on the fixed part along its axis; a rotating part being sleeved on the axial part, a locking connection being able to be formed between the rotating part and the axial part to limit the rotation of the rotating part, and after the locking relationship is released, the rotating part being able to rotate relative to the axial part; a spring being sleeved on the axial part, the spring driving the axial part to slide after the angle of the rotating part is adjusted, so that the axial part is engaged with the rotating part.

[0007] In some embodiments, the fixing member includes a first fixing block and a second fixing block; one end of the shaft member passes through the first fixing block, and the other end passes through the second fixing block.

[0008] In some embodiments, the axis member includes an axis rod and a clamping block, both ends of the axis rod are connected to the first fixed block and the second fixed block, and the clamping block is fixedly set on the axis rod; the rotating member includes a rotating rod and a rotating tube, the rotating tube is fixedly set on the rotating rod, and the rotating tube is sleeved on the axis rod; the clamping block is provided with a first clamping portion, and the rotating tube is provided with a second clamping portion, and the first clamping portion and the second clamping portion cooperate to form a clamping structure to limit the rotation of the rotating tube relative to the axis rod.

[0009] In some embodiments, the first engaging portion is constructed as a plurality of first teeth uniformly arranged on the outer wall of the block along the circumferential direction, and the second engaging portion is constructed as a plurality of second teeth uniformly arranged on the inner wall of the rotating tube along the circumferential direction, and the plurality of first teeth cooperate with the plurality of second teeth to form a locking connection relationship.

[0010] In some embodiments, the first engaging portion is constructed as a plurality of third teeth uniformly arranged along the circumferential direction on the end face of the block, and the second engaging portion is constructed as a plurality of fourth teeth uniformly arranged along the circumferential direction on the end face of the rotating tube, and the plurality of third teeth cooperate with the plurality of fourth teeth to form a locking connection relationship.

[0011] In some embodiments, the outer walls at both ends of the shaft rod are constructed as a first prismatic surface, and the first fixing block and the second fixing block are both provided with a first prismatic hole, and the first prismatic surface cooperates with the first prismatic hole to limit the rotation of the shaft member relative to the fixing member.

[0012] In some embodiments, it also includes an adjustment control member installed on the base plate, the adjustment control member is provided with a first limit portion, the clamping block is provided with a second limit portion, the first limit portion cooperates with the second limit portion to limit the rotation of the shaft member relative to the fixing member.

[0013] In some embodiments, the first limiting portion is constructed as a plurality of fifth teeth arranged on the adjustment control member, and the second limiting portion is constructed as a plurality of sixth teeth arranged on the outer wall of the block, and the plurality of fifth teeth cooperate with the plurality of sixth teeth to limit the circumferential rotation of the block.

[0014] In some embodiments, the first limiting portion is constructed as a second prismatic hole provided on the adjustment control member, the second limiting portion is constructed as a second prismatic surface provided on the outer wall of the block, and the second prismatic hole cooperates with the second prismatic surface to limit the circumferential rotation of the block.

[0015] In some embodiments, a pull ring and a limit ring are respectively provided at both ends of the shaft member.

[0016] Compared with the prior art, the embodiments of the present invention have the following advantages and beneficial effects:

[0017] 1. The utility model comprises a fixing member installed on a bottom plate, an axis member slidably arranged on the fixing member, and a rotating member sleeved on the axis member. Since the rotating member and the axis member cooperate to form a clamping structure through the first clamping part and the second clamping part, the rotation of the rotating member can be restricted, and after the clamping relationship is released, the rotating member can rotate relative to the axis member; the engagement and separation between the first clamping part and the second clamping part are controlled by the axis member sliding along its axis. When the first clamping part and the second clamping part are in the engaged state, the rotating member is in a stable limited state and cannot rotate, so as to provide a relatively stable support; when it is necessary to adjust the support angle of the rotating member, it is only necessary to apply force to the axis member externally to make it move axially, so that the first clamping part and the second clamping part are separated, and at this time the rotating member can rotate around the axis member to rotate, activate or store the support angle, and after the adjustment, the engagement of the first clamping part and the second clamping part is restored to achieve the purpose of limiting again, and the restored state here can be automatically reset by a spring.

[0018] 2. The utility model adopts a variety of structures to limit the rotation of the shaft member. One of them is to achieve rotation limit by setting matching prismatic surfaces and prismatic holes on the shaft member and the fixing member. The other is to achieve rotation limit by installing an adjustment control member on the bottom plate and utilizing the first limit portion on the adjustment control member to cooperate with the second limit portion on the shaft member. The above structures are simple and practical, and can ensure the axial movement of the shaft member while limiting the rotation of the shaft member.

[0019] In general, the angle positioning structure using internal and external teeth provided in the embodiment of the utility model can achieve the purpose of improving support stability, simplifying support point position control, or avoiding scattering when lifting through the mutual engagement and limiting of the shaft part and the rotating part. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the appearance of the first corner positioning structure provided by the utility model;

[0022] Figure 2 for Figure 1 A magnified schematic diagram of component construction details;

[0023] Figure 3 for Figure 1 A magnified schematic diagram of the construction details of some components in the figure;

[0024] Figure 4 A schematic diagram of the appearance of the second corner positioning structure provided by the utility model;

[0025] Figure 5 for Figure 4 The internal structure diagram of the corner positioning structure;

[0026] Figure 6 for Figure 4 Schematic diagram of the internal structure of the rotating tube;

[0027] Figure 7 A schematic diagram of the appearance of a third corner positioning structure provided by the utility model;

[0028] Figure 8 for Figure 7 The internal structure diagram of the corner positioning structure;

[0029] Fig. 9 for Figure 7 A magnified schematic diagram of the construction details of some components in the figure;

[0030] Fig.10 This is a simplified version of the corner positioning structure principle explanation diagram in the utility model.

[0031] Marks and corresponding parts names in the attached drawings:

[0032] 1-bottom plate, 2-fixing part, 21-first fixing block, 211-first prism hole, 212-first fixing block support shaft, 22-second fixing block, 222-second fixing block support shaft, 3-axial part, 31-axial rod, 311-first prism surface, 32-block, 321-first clamping part, 322-second limiting part, 4-rotating part, 41-rotating rod, 411-connecting hole, 42-rotating tube, 421-second clamping part, 422-connecting column, 423-overlapping hole, 5-adjusting control part, 51-first limiting part, 6-spring, 7-pull ring, 8-limiting ring. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0036] In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0037] Please refer to Figures 1 to 9 , an angle positioning structure using internal and external teeth is provided in the embodiment of the present application, including a fixed part 2 installed on a base plate 1, the fixed part 2 is connected to an axis member 3, and the axis member 3 can slide linearly on the fixed part 2 along its axis; a rotating part 4 is sleeved on the axis member 3, and a snap-fit ​​connection can be formed between the rotating part 4 and the axis member 3 to limit the rotation of the rotating part 4, and after the snap-fit ​​relationship is released, the rotating part 4 can rotate relative to the axis member 3; a spring 6 is sleeved on the axis member 3, and the spring 6 drives the axis member 3 to slide after the angle of the rotating part 4 is adjusted, so that the axis member 3 is snap-fitted with the rotating part 4.

[0038] It should be noted that the bottom plate 1 here can be a support surface, a folding stool, a table, etc., which is not limited here. For the sake of easy understanding, the embodiment of the utility model uses a bracket as an example for explanation. The fixing member 2 is used to support the shaft member 3 to position the entire corner positioning structure to ensure the stability of the corner positioning structure. The fixing member 2 can be connected to the bottom plate 1 by bolts, welding, clamping mechanism, or other methods. The shaft member 3 can slide along the axis on the fixing member 2, and this effect can be achieved by passing the shaft member 3 through the fixing member 2.

[0039] A rotating member 4 is sleeved on the shaft member 3, and the rotating member 4 can rotate around the shaft member 3, so that the angle positioning structure can adjust the direction or angle when needed. The rotating member 4 and the shaft member 3 form a snap connection through a matching limiting structure, so that it is possible to control whether the rotating member 4 can rotate and limit the rotation angle value after each rotation, thereby providing a stable support effect to solve the problems in the prior art of unstable support, difficult to control the position of the support point, or easy scattering when lifting.

[0040] It should be noted that the axial movement of the shaft member 3 can be achieved by external force, for example, the operator can push or pull the shaft member 3 to achieve the axial movement of the shaft member 3. At the same time, manual operation can also be changed to mechanical power. If electronic equipment is used to control the mechanical power, the opening and closing of the corner positioning structure can be remotely controlled. After a slight improvement, it can be applied to various intelligent remote control fields such as doors, car doors, valves, etc. commonly used today.

[0041] According to some embodiments of the present application, the fixing member 2 includes a first fixing block 21 and a second fixing block 22 ; one end of the shaft member 3 passes through the first fixing block 21 , and the other end passes through the second fixing block 22 .

[0042] According to some embodiments of the present application, the axis member 3 includes an axis rod 31 and a clamping block 32, and the two ends of the axis rod 31 respectively pass through the first fixed block 21 and the second fixed block 22, and the clamping block 32 is fixedly set on the axis rod 31; the rotating member 4 includes a rotating rod 41 and a rotating tube 42, and the rotating tube 42 is fixedly set on the rotating rod 41, and the rotating tube 42 is sleeved on the axis rod 31; a first clamping portion 321 is provided on the clamping block 32, and a second clamping portion 421 is provided on the rotating tube 42, and the first clamping portion 321 cooperates with the second clamping portion 421 to form a clamping structure to limit the rotation of the rotating tube 42 relative to the axis rod 31.

[0043] Specifically, the clamping block 32 is columnar, coaxially arranged with the shaft 31, and located between the first fixed block 21 and the second fixed block 22. The rotating rod 41 is U-shaped, having two connecting ends, the two connecting ends are located between the first fixed block 21 and the second fixed block 22, and the clamping block 32 is located between the two connecting ends. One end of the rotating tube 42 is connected to the connecting end close to the clamping block 32, or both ends of the rotating tube 42 are connected to the two connecting ends, and the rotating tube 42 rotates synchronously with the rotating rod 41.

[0044] Please refer to Figures 1 to 6 According to some embodiments of the present application, the first engaging portion 321 is constructed as a plurality of first teeth uniformly arranged on the outer wall of the block 32 along the circumferential direction, and the second engaging portion 421 is constructed as a plurality of second teeth uniformly arranged on the inner wall of the rotating tube 42 along the circumferential direction, and the plurality of first teeth cooperate with the plurality of second teeth to form an engaging connection relationship. When an external force acts on the shaft rod 31 to make it move axially, the first teeth on the block 32 and the second teeth on the rotating tube 42 are separated from each other, and the rotation limit of the rotating tube 42 is released at this time, and the rotating tube 42 can be driven to rotate around the axis of the shaft rod 31 by the rotating rod 41, so as to adjust the angle of the rotating member. When the external force disappears, under the driving action of the spring 6, the shaft rod 31 moves in the opposite direction, so that the first teeth on the block 32 and the second teeth on the rotating tube 42 are engaged with each other, and the rotating tube 42 can be rotationally limited at this time, and the rotation of the rotating rod 41 is restricted, so as to achieve stable support after the angle adjustment.

[0045] Please refer to Figures 7 to 9 According to some embodiments of the present application, the first engaging portion 321 is constructed as a plurality of third teeth uniformly arranged on the end face of the block 32 along the circumferential direction, and the second engaging portion 421 is constructed as a plurality of fourth teeth uniformly arranged on the end face of the rotating tube 42 along the circumferential direction, and the plurality of third teeth cooperate with the plurality of fourth teeth to form an engaging connection relationship. In this scheme, the third teeth and the fourth teeth are respectively arranged on the end face of the component, and can form a matching relationship to limit the rotation of the rotating member 4 around the shaft 31. Through the sliding movement of the shaft 31, the axial positions of the third teeth and the fourth teeth are changed, thereby realizing the mutual separation or combination of the third teeth and the fourth teeth. When the third teeth and the fourth teeth are in the combined state, by applying a certain preload force to the spring 6, a certain axial pressure can be generated between the third teeth and the fourth teeth, so that the support of the rotating rod 41 can be more stable and reliable. This limiting method is more suitable for the damping type of angular positioning structure setting.

[0046] Please refer to Figures 4 to 6According to some embodiments of the present application, the outer walls at both ends of the shaft rod 31 are constructed as first prismatic surfaces 311, and the first fixed block 21 and the second fixed block 22 are both provided with first prismatic holes 211, and the first prismatic surfaces 311 cooperate with the first prismatic holes 211 to limit the rotation of the shaft member 3 relative to the fixing member 2.

[0047] Specifically, in order not to affect the rotation of the rotating rod 41, a first fixed block support shaft 212 is provided on the inner side of the first fixed block 21, and a second fixed block support shaft 222 is provided on the inner side of the second fixed block 22; overlapping holes 423 are opened at both ends of the rotating tube 42, so that the two ends of the rotating tube 42 are overlapped on the first fixed block support shaft 212 and the second fixed block support shaft 222.

[0048] When the two ends of the rotating tube 42 are connected to the two connecting ends of the rotating rod 41, connecting holes 411 can be opened on the two connecting ends of the rotating rod 41, and connecting columns 422 are set at both ends of the rotating tube 42. The connecting holes 411 and the connecting columns 422 are matching prismatic structures. After the connecting columns 422 are extended into the connecting holes 411, the rotation of the rotating tube 42 relative to the rotating rod 41 can be limited, so that the two form a steering fixed connection and can then rotate synchronously.

[0049] According to some embodiments of the present application, the angular positioning structure using internal and external teeth for positioning further includes an adjustment control member 5 mounted on the bottom plate 1, the adjustment control member 5 is provided with a first limiting portion 51, the clamping block 32 is provided with a second limiting portion 322, the first limiting portion 51 cooperates with the second limiting portion 322 to limit the rotation of the shaft member 3 relative to the fixing member 2. By cooperating with the first limiting portion 51 on the adjustment control member 5 and the second limiting portion 322 on the clamping block 32, the shaft rod 31 cannot rotate, but can move along its axial direction.

[0050] Please refer to Figures 1 to 3 According to some embodiments of the present application, the first limiting portion 51 is constructed as a plurality of fifth teeth arranged on the adjusting control member 5, and the second limiting portion 322 is constructed as a plurality of sixth teeth arranged on the outer wall of the blocking block 32, and the plurality of fifth teeth cooperate with the plurality of sixth teeth to limit the circumferential rotation of the blocking block 32.

[0051] Specifically, the plurality of fifth teeth can form an arc-shaped tooth plate structure, and the sixth teeth cooperate with the fifth teeth, so that the shaft 31 cannot rotate, but can move along its axial direction. It should be noted that when the tooth shape of the plurality of sixth teeth and the plurality of first teeth, as well as the number and position of distribution on the circumference of the outer wall of the clamping block 32 are the same, that is, the plurality of sixth teeth and the plurality of first teeth together constitute a tooth structure on the outer wall of the clamping block 32, that is, one end of the tooth structure can extend into the rotating tube 42 to cooperate with the plurality of second teeth, and the tooth shape of the other end can cooperate with the plurality of fifth teeth on the adjustment control member 5.

[0052] Please refer to Figures 7 to 9 According to some embodiments of the present application, the first limiting portion 51 is configured as a second prism hole provided on the adjustment control member 5, the second limiting portion 322 is configured as a second prism surface provided on the outer wall of the clamping block 32, and the second prism hole cooperates with the second prism surface to limit the circumferential rotation of the clamping block 32. Since the adjustment control member 5 is fixedly mounted on the bottom plate, the second prism hole cooperates with the second prism surface, and when the shaft rod 31 slides in the axial direction, the second prism surface on the clamping block 32 slides along the second prism hole on the adjustment control member 5, thereby limiting the rotation of the shaft rod 31.

[0053] According to some embodiments of the present application, a pull ring 7 and a limit ring 8 are respectively provided at both ends of the shaft member 3. Specifically, the pull ring 7 and the limit ring 8 are respectively provided at both ends of the shaft rod 31. By providing the pull ring 7, it is convenient to apply force to the shaft rod 31 so that it moves axially, causing the first engaging portion 321 to separate from the second engaging portion 421; by providing the limit ring 8, it is convenient to control the axial displacement of the shaft rod 31 when the pull ring 7 is used to pull the shaft rod 31 to move. In addition, when the spring 6 rebounds and drives the shaft member 3 to move, the pull ring 7 actually also has the function of a limit ring.

[0054] A pull ring 7 is provided at the end of the shaft member 3. When the operator pulls the pull ring 7, the movement of the shaft member 3 will cause the first engaging portion 321 to separate from the second engaging portion 421. At this time, the spring 6 is compressed. In this state, the rotating member 4 can rotate around the shaft member 3, and the operator can adjust the support angle of the rotating member 4. When the angle of the rotating member 4 is adjusted, the spring 6 can be reset by simply stopping the force on the pull ring 7. Under the action of the spring 6, the shaft member 3 will be reset, and the first engaging portion 321 and the second engaging portion 421 will re-engage. The rotating member 4 will no longer be able to rotate around the shaft member 3, thereby achieving the purpose of stable support.

[0055] Further, Figures 1 to 9The three design schemes shown in the figure are actually designed based on the principle of corner positioning structure. In brief, the principle of corner positioning structure includes five basic design elements and two different existence states. The five basic design elements are fixed parts, shaft parts, rotating parts, adjustment control system, and power system. The two existence states are the corner locking state and the corner releasing state. Among them, the main function of the fixed parts is to attach the entire corner positioning structure to a specific practical object, such as Figures 1 to 9 In the embodiment, the entire corner positioning structure is positioned on the bottom plate; the main function of the axis member is to provide a rotation axis for the rotation of the rotating member; the main function of the rotating member is to rotate around the axis member and provide the required support angle for daily use. It can be a square frame on the same plane, or a roller around the axis member, or any other form connected to the axis member, such as the common rear wheel of a bicycle. It should be noted that there is actually no essential difference between the fixed member and the rotating member, but they are different due to the difference in their attached objects or functional properties; the main function of the adjustment control system is to limit the rotation or sliding of the fixed member, the axis member, and the rotating member, and to provide related components for energy storage and release for each rotation adjustment; the main function of the power system is to provide the power required during the angle adjustment process.

[0056] The limit relationship in the regulating control system usually includes four different combinations, namely, round limit, two-way rotation limit, one-way rotation limit, and damping limit. Figures 1 to 9 The implementation examples shown in the figure use three types of limit modes: round limit, two-way angle limit, and damping limit. Among the angle division components in the control system, there are 8 different possible forms that are commonly used, namely, internal gear form, external gear form, inner hole wheel form, outer hole wheel form, side surface limit concave and convex form, side surface damping concave and convex form, strip clamping tooth form, and strip clamping hole form. Figures 1 to 9 The implementation examples shown in the figure mainly use four types of angle division components: internal gear, external gear, side limit convex and concave convex, and side damping convex and concave convex. There are also four basic forms of shaft parts, which are symmetrical with its own axis as the axis of symmetry, asymmetrical with its own axis as the axis of symmetry, coaxial multi-segment, or coaxial inner and outer multi-axle sleeve. Figures 1 to 9 The axis members used in the embodiments shown in the figure are all symmetrical with their axis lines as the axis of symmetry.

[0057] In any rotation angle limiting structural system, there is at least one pair of rotation relationship and one pair of rotation angle limiting relationship between the fixed part and the rotating part. The shaft member between the fixed part and the rotating part can exist alone, or it can be fixedly connected to the fixed part or fixedly connected to the rotating part. When the shaft member exists alone, there are actually two ways for the shaft member to operate. One is to rotate with its own axis as the axis, and the other is to slide along its own axis. The regulating control system for the rotation angle limiting can exist directly between the fixed part and the rotating part, or it can exist indirectly between the fixed part and the rotating part through the conduction of the shaft member. Therefore, at least five major categories of different combinations of rotation angle positioning structural systems can be divided: 1. The shaft member only rotates but does not slide, and exists independently; 2. The shaft member only rotates but does not slide, and exists in combination with the fixed part or the rotating part; 3. The shaft member only slides but does not rotate, and exists independently; 4. The shaft member only slides but does not rotate, and exists in combination with the fixed part or the rotating part; 5. The shaft member can rotate and slide, and exists independently. Figures 1 to 9 The three implementation cases shown in the figure are all symmetrical forms in which the axis member of the third type of corner positioning structural system takes its axis as the axis of symmetry. Of course, if the four limiting relationships, eight common angle division components, four axis member forms, and the various different styles contained in each type are combined, N different forms of corner limiting structural systems can be combined.

[0058] It should be noted that as the number of intermediate parts between the fixed part and the rotating part increases, the mutual movement relationship and the matching limit relationship will also increase. For example, a sliding shaft rod in the opposite direction can actually be added inside the slidable shaft part, which will add a layer of limit structure. If it is connected with the fixed part or the rotating part, the mutual dynamic relationship will become extremely complicated. However, this complexity may have some unexpected effects in the field of multi-dimensional mold processing or complex mechanical structure.

[0059] by Fig.10 For example, Figures 1 to 9 The operating principle of the three corner positioning structures shown in the figure is briefly explained in diagram form. Assume that the surface where the fixing part is located is S woz , the surface where the rotating part is located is S xoz The rotating surface where the axis part is located is S yoz , the sliding axis where the axis part is located is L oz The "corner" and "positioning" in the corner positioning structure determine S woz With S xoz There must be at least one pair of rotational relationships and their matching limiting relationships between them. When the rotational limiting relationship is formed through the transmission of the shaft member, it will be divided into two pairs of rotational relationships and their matching limiting relationships, as shown in the following example. Fig.10As shown in , the two pairs of rotational relationships are rotational relationship 2 between the fixed member and the shaft member, and rotational relationship 3 between the rotating member and the shaft member. Figures 1 to 9 In the three corner positioning structures shown in FIG, the shaft member is slidable but not rotatable and exists independently, so there is a sliding relationship 1 and a matching limiting relationship between the shaft member and the fixed member or the rotating member. oz When sliding back and forth, the entire corner positioning structure can be in two different states: locked or separated. By combining these three relationships and their matching limit relationships reasonably, a variety of similar Figures 1 to 9 The simple and practical corner positioning structure shown in .

[0060] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model. It should be noted that the structures or components illustrated in the drawings are not necessarily drawn to scale, and the utility model omits the description of known components and processing technologies and processes to avoid unnecessary limitations on the utility model.

Claims

1. A rotation angle positioning structure using internal and external teeth, characterized in that: It comprises a fixing member (2) mounted on a base plate (1), the fixing member (2) being connected to an axial member (3), and the axial member (3) being able to slide linearly on the fixing member (2) along its axis; The shaft member (3) is sleeved with a rotating member (4), and a snap-fit ​​connection can be formed between the rotating member (4) and the shaft member (3) to limit the rotation of the rotating member (4), and after the snap-fit ​​relationship is released, the rotating member (4) can rotate relative to the shaft member (3); The shaft member (3) is sleeved with a spring (6), and the spring (6) drives the shaft member (3) to slide after the rotation angle of the rotating member (4) is adjusted, so that the shaft member (3) is engaged with the rotating member (4).

2. The angular positioning structure using internal and external teeth as claimed in claim 1, characterized in that: The fixing member (2) comprises a first fixing block (21) and a second fixing block (22); one end of the shaft member (3) passes through the first fixing block (21), and the other end passes through the second fixing block (22).

3. The angular positioning structure using internal and external teeth as claimed in claim 2, characterized in that: The shaft member (3) comprises a shaft rod (31) and a clamping block (32), the two ends of the shaft rod (31) are connected to the first fixing block (21) and the second fixing block (22), and the clamping block (32) is fixedly arranged on the shaft rod (31); The rotating member (4) comprises a rotating rod (41) and a rotating tube (42), wherein the rotating tube (42) is fixedly arranged on the rotating rod (41), and the rotating tube (42) is sleeved on the shaft rod (31); The clamping block (32) is provided with a first clamping portion (321), and the rotating tube (42) is provided with a second clamping portion (421). The first clamping portion (321) and the second clamping portion (421) cooperate to form a clamping structure to limit the rotation of the rotating tube (42) relative to the shaft (31).

4. The angular positioning structure using internal and external teeth as claimed in claim 3, characterized in that: The first engaging portion (321) is constructed as a plurality of first teeth uniformly arranged along the circumferential direction on the outer wall of the engaging block (32), and the second engaging portion (421) is constructed as a plurality of second teeth uniformly arranged along the circumferential direction on the inner wall of the rotating tube (42), and the plurality of first teeth cooperate with the plurality of second teeth to form an engaging connection relationship.

5. The angular positioning structure using internal and external teeth as claimed in claim 3, characterized in that: The first engaging portion (321) is constructed as a plurality of third teeth uniformly arranged on the end surface of the engaging block (32) along the circumferential direction, and the second engaging portion (421) is constructed as a plurality of fourth teeth uniformly arranged on the end surface of the rotating tube (42) along the circumferential direction, and the plurality of third teeth cooperate with the plurality of fourth teeth to form an engaging connection relationship.

6. The angular positioning structure using internal and external teeth as claimed in claim 3, characterized in that: The outer walls at both ends of the shaft rod (31) are constructed as first prism surfaces (311), and the first fixing block (21) and the second fixing block (22) are both provided with first prism holes (211), and the first prism surfaces (311) cooperate with the first prism holes (211) to limit the rotation of the shaft core member (3) relative to the fixing member (2).

7. The angular positioning structure using internal and external teeth as claimed in claim 3, characterized in that: The invention also comprises an adjusting control member (5) mounted on the bottom plate (1), wherein the adjusting control member (5) is provided with a first limiting portion (51), and the clamping block (32) is provided with a second limiting portion (322), wherein the first limiting portion (51) cooperates with the second limiting portion (322) to limit the rotation of the shaft member (3) relative to the fixing member (2).

8. The angle positioning structure using internal and external teeth as claimed in claim 7, characterized in that: The first limiting portion (51) is constructed as a plurality of fifth teeth arranged on the adjustment control member (5), and the second limiting portion (322) is constructed as a plurality of sixth teeth arranged on the outer wall of the clamping block (32), and the plurality of fifth teeth cooperate with the plurality of sixth teeth to limit the circumferential rotation of the clamping block (32).

9. The angle positioning structure using internal and external teeth as claimed in claim 7, characterized in that: The first limiting portion (51) is constructed as a second prism hole provided on the adjustment control member (5), the second limiting portion (322) is constructed as a second prism surface provided on the outer wall of the clamping block (32), and the second prism hole cooperates with the second prism surface to limit the circumferential rotation of the clamping block (32).

10. The angle positioning structure using internal and external teeth according to any one of claims 1 to 9, characterized in that: A pull ring (7) and a limit ring (8) are respectively provided at both ends of the shaft core member (3).

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