Pivot rod device with locking function

Abstract

A pivot rod device with a locking function comprises a mounting seat, a rod piece and a locking piece, and the mounting seat comprises a through hole and an embedding part. The rod piece penetrates through the through hole and comprises a fixing pipe with a locking piece through hole. And the fixed pipe is rotatably pivoted with the mounting seat. The locking piece comprises a locking part which is movably arranged in the locking piece through hole, when the pivot rod device is in a free state, the locking part moves towards the interior of the locking piece through hole and is decoupled from the embedding part, the rod piece can rotate relative to the mounting seat, and when the pivot rod device is in a locking state, the locking part moves towards the interior of the locking piece through hole and is decoupled from the embedding part. And the locking part moves towards the embedding part and is coupled with the embedding part, so that the rod piece cannot rotate relative to the mounting seat.

Description

Technical Field

[0001] The invention relates to a device comprising a rotatable rod, in particular to a pivot rod device with a locking function. Background Art

[0002] A conventional folding chair as disclosed in Taiwan Patent No. M467398U includes a positioning seat, three supporting legs rotatably passing through the positioning seat, a cloth body disposed at the top of the supporting legs, and two restraining belts disposed at the upper and lower ends of one of the supporting legs, respectively. When the folding chair is unfolded, the supporting legs are unfolded and the cloth body is spread open for sitting. When the folding chair is folded, the supporting legs are folded into a columnar shape, and the restraining belts respectively surround and fix the upper and lower ends of the supporting legs.

[0003] The disadvantage of the folding chair is that when unfolding the folding chair, the restraining belts at the upper and lower ends of the folding chair need to be disassembled respectively. When folding the folding chair, after folding the supporting legs, the restraining belts need to be tied to fix the supporting legs while ensuring that the supporting legs do not spread out. This is quite inconvenient and time-consuming and labor-intensive to use. Summary of the invention

[0004] An object of the present invention is to provide a pivot rod device with a locking function which can improve at least one of the above-mentioned disadvantages.

[0005] The pivot rod device with locking function described in the present invention comprises a mounting seat, a rod, and a locking member. The mounting seat comprises a seat body, a through hole penetrating the seat body along a first axial direction, and an engaging portion arranged on the seat body and adjacent to the through hole. The rod passes through the through hole and extends along the central axis. The rod comprises a fixing tube extending into the through hole and surrounding the central axis. The fixing tube can be pivotally connected to the seat body around a rotation axis that intersects the central axis and the first axial direction, and the fixing tube has a locking member through hole penetrating in a radial direction. The rod can rotate relative to the seat body between a preparation position and a swing position. When the rod is located at the preparation position, the rod is parallel to the first axial direction, and the locking member through hole faces the engaging portion. When the rod is located at the swing position, the rod and the first axial direction are inclined at an angle, and the locking member through hole is away from the engaging portion. The locking member includes a locking portion movably arranged in the locking member through hole. When the pivot rod device is in a free state, the locking portion moves toward the locking member through hole and is decoupled from the engaging portion, and the rod can rotate relative to the seat body. When the pivot rod device is in a locked state, the rod is located in the preparatory position, the locking portion moves toward the engaging portion and is coupled to the engaging portion, and the rod cannot rotate relative to the seat body.

[0006] The pivot rod device with a locking function described in the present invention, the rod also includes a moving tube that can be movably penetrated in the fixed tube and around the central axis, the moving tube has a retraction hole that penetrates radially, the locking piece also includes an elastic part that is fixed to the fixed tube and connected to the locking part, the locking part has an abutment end adjacent to the moving tube, and an embedding end opposite to the abutment end and protruding from the locking piece through hole, the elastic part has a biasing force that constantly drives the locking part to move toward the moving tube, when the pivot rod device is in the free state, the retraction hole of the moving tube is aligned with the locking piece through hole of the fixed tube, the abutment end of the locking part extends into the retraction hole, and the embedding end of the locking piece is adjacent to the locking piece through hole, when the pivot rod device is in the locked state, the retraction hole of the moving tube is away from the locking piece through hole of the fixed tube, the moving tube abuts against the abutment end of the locking part, and the embedding end of the locking part is away from the locking piece through hole and coupled to the embedding part.

[0007] In the pivot rod device with locking function described in the present invention, the seat body has an inner circumference surrounding and defining the through hole, and the engaging portion is a groove formed on the inner circumference of the seat body and used for the locking portion to extend into.

[0008] In the pivot rod device with locking function described in the present invention, the locking element through hole and the retraction hole penetrate in a radial direction parallel to the rotation axis.

[0009] The pivot rod device with a locking function described in the present invention, the locking member is a spring leaf formed by bending twice, the elastic portion has a fixed section fixed to the fixed tube, and an elastic section extending obliquely from the fixed section toward the movable tube, the abutting end of the locking portion is bent and connected to an end of the elastic section opposite to the fixed section.

[0010] The pivot rod device with a locking function described in the present invention has an inner circumferential surface surrounding and defining the through hole, and the rod also includes a pivot seat surrounding and fixedly connected to the fixing tube and pivotally connected to the seat body, the pivot seat having an outer surface facing the inner circumferential surface of the seat body, an inner surface opposite to the outer surface and surrounding the fixing tube, and a slit extending from the outer surface to the inner surface and aligned with the locking member through hole, the fixing section of the elastic part is fixedly arranged between the pivot seat and the fixing tube and adjacent to the locking member through hole, and the locking part of the locking member can movably extend into the slit.

[0011] In the pivot rod device with locking function described in the present invention, a groove extending in a direction parallel to the central axis is formed on the inner surface of the pivot seat, and the fixing section is embedded in the groove extending in a direction parallel to the central axis.

[0012] The pivot rod device with locking function described in the present invention has a pivot groove formed on the inner circumferential surface of the seat body, and the pivot seat also has a pivot block protruding from the outer surface and rotatably clamped in the pivot groove.

[0013] In the pivot rod device with locking function described in the present invention, the angle between the elastic segment of the elastic part and the fixed segment is greater than 90 degrees and less than 180 degrees, and the bending angle of the abutting end of the locking part is less than 90 degrees.

[0014] The pivot rod device with a locking function described in the present invention comprises: the seat body having an inner circumferential surface surrounding the through hole, a first end surface connected to one side of the inner circumferential surface along the first axial direction, and a second end surface connected to the side of the inner circumferential surface opposite to the first end surface along the first axial direction, the rotation axis extends along a second axial direction perpendicular to the first axial direction, the inner circumferential surface has a first inner surface segment located on one side of the through hole along a third axial direction perpendicular to the first axial direction and the second axial direction, a second inner surface segment located on the other side of the through hole along the third axial direction, and a connecting surface segment connected between the first inner surface segment and the second inner surface segment and for the fixed tube to be pivotally connected, the first inner surface segment and the second inner surface segment extend obliquely relative to the first axial direction, and when the rod is located in the preparation position When the rod is in the swing position, the side of the rod facing the first inner surface section abuts against the portion of the first inner surface section adjacent to the second end surface and is spaced from the portion of the first inner surface section adjacent to the second end surface. The side of the rod facing the second inner surface section abuts against the portion of the second inner surface section adjacent to the second end surface and is spaced from the portion of the second inner surface section adjacent to the first end surface. When the rod is in the swing position, the side of the rod facing the first inner surface section abuts against the portion of the first inner surface section adjacent to the second end surface and is spaced from the portion of the first inner surface section adjacent to the first end surface. The side of the rod facing the second inner surface section abuts against the portion of the second inner surface section adjacent to the first end surface and is spaced from the portion of the second inner surface section adjacent to the second end surface.

[0015] The pivot rod device with a locking function described in the present invention also includes a biasing member arranged on the seat body, and the biasing member has a biasing force that constantly drives the rod member to rotate toward the swing position. When the pivot rod device changes from the locking state to the free state, the biasing member drives the rod member to rotate to the swing position.

[0016] The beneficial effect of the present invention is that: through the locking member provided on the rod and the engaging portion provided on the seat, when the rod is located at the preparatory position and the locking portion moves toward and couples with the engaging portion, the rod can be locked to the seat, so that the rod cannot rotate relative to the seat. When the locking portion moves into the locking member through hole and is uncoupled from the engaging portion, the locking can be released so that the rod can rotate relative to the seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional composite diagram of a folding device in a folded state, the folding device comprising an embodiment of a pivot rod device with a locking function of the present invention, the embodiment is in a locked state, and a rod member of the embodiment is in a ready position relative to a seat body;

[0018] Figure 2 is a three-dimensional exploded view of the folding device;

[0019] Figure 3 is a side view of the embodiment;

[0020] Figure 4 is a perspective exploded view of the embodiment;

[0021] Figure 5 is an incomplete three-dimensional cross-sectional view of the embodiment, illustrating the combination relationship of a seat body, a movable tube, a fixed tube, a pivot seat, a locking member, and a biasing member of the embodiment;

[0022] Figure 6 is along Figure 3 A sectional view taken along line VI-VI;

[0023] Figure 7 is along Figure 6 An incomplete cross-sectional view taken along line VII-VII;

[0024] Figure 8 is along Figure 6 A sectional view taken along line VIII-VIII in FIG.

[0025] Fig. 9 is an incomplete three-dimensional cross-sectional view of the embodiment, illustrating the combination relationship between the locking member, the pivot seat and the seat body;

[0026] Fig.10 yes Figure 7 A magnified view of the middle A area;

[0027] Fig.11 is a three-dimensional composite diagram of the folding device in an extended state, and the embodiment in a free state;

[0028] Fig.12 yes Fig.11 An incomplete cross-sectional view with a similar perspective Fig.10 ;

[0029] Fig.13 yes Fig.11 An incomplete cross-sectional view with a similar perspective Figure 8 ;

[0030] Fig.14 is a three-dimensional composite diagram of the folding device in an unfolded state, the embodiment is in a fixed state, and the rod is in a swinging position relative to the seat;

[0031] Fig.15 yes Fig.14 An incomplete cross-sectional view with a similar perspective Fig.13 ;and

[0032] Fig.16 is a similar Fig.15 , illustrating the rod member of the embodiment rotates from the swing position toward the preparatory position. DETAILED DESCRIPTION

[0033] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments. Before the present invention is described in detail, it should be noted that the first axial direction Z, the second axial direction X and the third axial direction Y described in the following description are perpendicular to each other. The first axial direction Z extends up and down.

[0034] See also Figure 1 and Figure 2 The embodiment of the pivot device 10 with a locking function of the present invention is applicable to a folding device 100, and the folding device 100 includes the pivot device 10 with a locking function, two support rods 20, a connecting rod unit 30, and a riding unit 40.

[0035] See also Figure 3 and Figure 4 The pivot rod device 10 with locking function includes a mounting seat 1, a rod 2, a locking member 3, a biasing member 4, and a buckle unit 5.

[0036] See also Figure 5 The mounting seat 1 includes a seat body 11, a through hole 12 penetrating the seat body 11 along the first axial direction Z, two branch holes 13 penetrating the seat body 11 along the first axial direction Z, a guide portion 14 disposed on the seat body 11 and adjacent to the through hole 12, and an engaging portion 15 disposed on the seat body 11 and adjacent to the through hole 12.

[0037] The seat body 11 has an inner circumferential surface 111 surrounding and defining the through hole 12, a first end surface 112 connected to one side of the inner circumferential surface 111 along the first axial direction Z, and a second end surface 113 connected to a side of the inner circumferential surface 111 opposite to the first end surface 112 along the first axial direction Z. The first end surface 112 is located above the second end surface 113.

[0038] The inner circumferential surface 111 of the seat body 11 has a first inner surface segment 114 located on one side of the through hole 12 along the third axial direction Y, a second inner surface segment 115 located on the other side of the through hole 12 along the third axial direction Y, and a connecting surface segment 116 connected between the first inner surface segment 114 and the second inner surface segment 115. The first inner surface segment 114 and the second inner surface segment 115 extend obliquely relative to the first axial direction Z. A clamping groove 117 is formed on the first inner surface segment 114. A pivot groove 118 is formed on the connecting surface segment 116. The guide portion 14 is convexly disposed on the second inner surface segment 115 and adjacent to the second end surface 113. The guide portion 14 has a guide inclined surface 141 that gradually extends toward the through hole 12, and a tip 142 formed at the end of the extending direction of the guide inclined surface 141. The fitting portion 15 is a groove formed at the junction of the connecting surface segment 116 and the first end surface 112.

[0039] See also Figure 5 ,and Figure 6 , the branch holes 13 are arranged at an angle with the through holes 12. In this embodiment, the structure in each of the branch holes 13 in the mounting seat 1 is similar to the structure in the through holes 12, the difference being that the slots 117 and the engaging portions 15 are not formed on the inner annular surface surrounding and defining each of the branch holes 13.

[0040] See also Figures 4 to 6 The rod 2 passes through the through hole 12 and extends along a central axis L1, and the rod 2 can rotate relative to the seat body 11 around a rotation axis L2 passing through the pivot groove 118 of the seat body 11. The rotation axis L2 extends along the second axial direction X and is perpendicular to the central axis L1 and the first axial direction Z.

[0041] The rod 2 is a telescopic tube and includes a fixed tube 21 extending into the through hole 12 and surrounding the central axis L1, a movable tube 22 movably inserted into the fixed tube 21 and surrounding the central axis L1, and a pivot seat 23 surrounding and fixed to the fixed tube 21 and pivotally connected to the seat body 11. The fixed tube 21 has a receiving end 211, a locking through hole 212 penetrating the receiving end 211 in a radial direction parallel to the rotation axis L2, a fastener through hole 213 penetrating the receiving end 211 in a radial direction perpendicular to the central axis L1 and the rotation axis L2, a mounting end 214 opposite to the receiving end 211 and located above the receiving end 211, and a fixing hole 215 penetrating the receiving end 211 in a radial direction parallel to the rotation axis L2 and located below the locking through hole 212.

[0042] The movable tube 22 has an insertion end 221 extending into the accommodating end 211, a retracted hole 222 penetrating the insertion end 221 in a radial direction parallel to the rotation axis L2, a snap-fit ​​hole 223 penetrating the insertion end 221 in a radial direction perpendicular to the central axis L1 and the rotation axis L2, and a support end 224 opposite to the insertion end 221 and located below the insertion end 221. When the movable tube 22 moves relative to the fixed tube 21 and the support end 224 moves away from the fixed tube 21, the rod 2 is extended, and when the movable tube 22 moves relative to the fixed tube 21 and the support end 224 moves adjacent to the fixed tube 21, the rod 2 is shortened.

[0043] The pivot seat 23 has an outer surface 231 facing the inner circumferential surface 111 of the seat body 11, a pivot block 232 protruding from the outer surface 231 and rotatably clamped in the pivot groove 118 of the seat body 11, an inner surface 233 opposite to the outer surface 231 and surrounding the fixed tube 21, a groove 234 formed on the side of the inner surface 233 opposite to the pivot block 232 and extending in a direction parallel to the central axis L1, a convex portion 235 protruding from the inner surface 233 and located in the groove 234, a slit 236 extending from the outer surface 231 to the inner surface 233 along a radial direction parallel to the rotation axis L2 and located in the groove 234, and an opening 237 extending from the outer surface 231 to the inner surface 233 along a radial direction perpendicular to the central axis L1 and the rotation axis L2 and extending in a direction parallel to the central axis L1.

[0044] See also Figure 5 , Figure 7 ,and Figure 8, the protrusion 235 of the pivot seat 23 extends into the fixing hole 215 of the fixing tube 21. The slit 236 of the pivot seat 23 is located above the protrusion 235 and is narrower along a direction parallel to the central axis L1. The slit 236 is aligned with the locking member through hole 212 of the fixing tube 21, and the opening 237 is aligned with the fastener through hole 213 of the fixing tube 21.

[0045] In this embodiment, the fixed tube 21 is fixedly connected to the pivot seat 23 and cannot move or rotate relative to the pivot seat 23, so the fixed tube 21 is indirectly pivoted to the seat body 11 through the pivot seat 23. Therefore, the pivot seat 23, the fixed tube 21 and the movable tube 22 can rotate together around the rotation axis L2 relative to the seat body 11. It should be noted that the distance between the fastener through hole 213 of the fixed tube 21 and the rotation axis L2 is equal to the distance between the guide portion 14 and the rotation axis L2. Therefore, when the rod 2 rotates relative to the seat body 11 and makes the fastener through hole 213 close to the guide portion 14, the guide portion 14 can extend into the opening 237 of the pivot seat 23 and the fastener through hole 213 of the fixed tube 21.

[0046] See also Figure 5 , 7 9. The locking member 3 is a metal spring sheet formed by bending twice and includes an elastic portion 31 fixed to the fixing tube 21 and a locking portion 32 connected to the elastic portion 31.

[0047] The elastic part 31 has a fixed section 311 fixed between the pivot seat 23 and the fixed tube 21 and adjacent to the lock through hole 212, and an elastic section 312 extending obliquely from the fixed section 311 toward the movable tube 22. The fixed section 311 is embedded in the groove 234 along a direction parallel to the central axis L1, and the fixed section 311 has a through hole 313 sleeved on the protrusion 235 of the pivot seat 23. The angle between the elastic section 312 of the elastic part 31 and the fixed section 311 is greater than 90 degrees and less than 180 degrees.

[0048] See also Fig.10, the locking portion 32 is located in the locking member through hole 212 and can move into the slit 236 in a radial direction parallel to the rotation axis L2. The locking portion 32 has a resting end 321 connected to one end of the elastic segment 312 opposite to the fixed segment 311 and adjacent to the moving tube 22, and an engaging end 322 opposite to the engaging end 321 and protruding from the locking member through hole 212 and passing through the slit 236. The resting end 321 is bent, and the bending angle is less than 90 degrees. The thickness of the engaging end 322 is slightly smaller than the width of the slit 236 along the direction parallel to the central axis L1. Thereby, the elastic force of the elastic portion 31 itself can drive the resting end 321 of the locking portion 32 to elastically rest against the moving tube 22. That is to say, the elastic portion 31 has a biasing force that constantly drives the locking portion 32 to move toward the moving tube 22.

[0049] See also Figure 5 , 8 9, the biasing member 4 is disposed on the first inner surface section 114 and faces the pivot seat 23 of the rod 2. The biasing member 4 is a metal spring sheet bent into a V-shape and has an embedded portion 41 inserted into the slot 117 of the seat body 11, and a spring portion 42 extending from the embedded portion 41 toward the direction adjacent to the first end face 112. The spring portion 42 has an elastic end 421 opposite to the embedded portion 41 and elastically abutting against the pivot seat 23. Therefore, the biasing member 4 has a biasing force constantly applied to the pivot seat 23. In addition, the position of the pivot seat 23 subjected to the force of the elastic end 421 is relatively located between the rotation axis L2 and the first end face 112 along the first axial direction Z. Therefore, when the elastic end 421 pushes against the pivot seat 23, the rod 2 can be rotated relative to the seat body 11 around the rotation axis L2.

[0050] See also Figure 4 , 8 The buckle unit 5 includes a base 51 fixed in the insertion end 221 of the moving tube 22, a spring sheet 52 disposed on the base 51 and bent into a V-shape, and a convex buckle portion 53 disposed on the spring sheet 52 and extending out of the buckling hole 223.

[0051] The base 51 has an axle pin 511 extending in a radial direction parallel to the rotation axis L2. The axle pin 511 is close to a side of the moving tube 22 adjacent to the buckle hole 223 in a radial direction perpendicular to the central axis L1 and the rotation axis L2. The spring sheet 52 has a bending portion 521 around which the axle pin 511 is arranged, and a spring sheet portion 522 connected to two opposite ends of the bending portion 521. One of the spring sheet portions 522 abuts against the moving tube 22, and the other is provided for the convex buckle portion 53. The bending portion 521 is adjacent to the support end portion 224 relative to the convex buckle portion 53. In this way, the spring sheet 52 can drive the convex buckle portion 53 to elastically extend out of the buckle hole 223 of the moving tube 22.

[0052] See also Figure 2 , the support rods 20 are respectively provided with the support holes 13 and can rotate relative to the base body 11. Each of the support rods 20 includes a support end 201 and a mounting end 202 opposite to the support end 201 and located above the support end 201. In this embodiment, the difference between each of the support rods 20 and the rod 2 is that each of the support rods 20 is not provided with the locking member 3. It should be noted that in other variations of this embodiment, each of the support rods 20 can also be a telescopic tube with other different structures, and is not limited thereto.

[0053] See also Figure 1 and Figure 2 , the connecting rod unit 30 can be expandably coupled to the mounting end 214 of the fixing tube 21 and the mounting end 202 of the support rod 20. The riding unit 40 can be expandably coupled to the connecting rod unit 30 and is located above the connecting rod unit 30. In this embodiment, the folding device 100 is a folding chair, and the riding unit 40 is a cloth body and can be used for riding after being unfolded. In other variations of this embodiment, the folding device 100 can also be other mechanical tools or daily necessities suitable for the pivot device 10 with a locking function, such as machine tools, folding tables or toys, etc. It should be particularly noted that since the detailed structure and actuation relationship of the support rod 20, the connecting rod unit 30 and the riding unit 40 are not the technical focus to be described in this embodiment, they will not be repeated in the subsequent description of the changing state of the folding device 100.

[0054] During the change process of the folding device 100, the linkage and relative position relationship of the various components of the pivot device 10 with a locking function are relatively complicated. Here, the relative positions and combination relationships of the various components of the pivot device 10 with a locking function when the rod 2 rotates around the rotation axis L2 to a preparatory position relative to the base 11 are first described.

[0055] See also Figure 8 ,and Fig.10 When the rod 2 rotates to the preparatory position relative to the seat body 11, the rod 2 is parallel to the first axial direction Z, and the side of the rod 2 facing the first inner surface segment 114 abuts against the portion of the first inner surface segment 114 adjacent to the first end surface 112, and is spaced from the portion of the first inner surface segment 114 adjacent to the second end surface 113. The side of the rod 2 facing the second inner surface segment 115 abuts against the portion of the second inner surface segment 115 adjacent to the second end surface 113, and is spaced from the portion of the second inner surface segment 115 adjacent to the first end surface 112. The locking through hole 212 and the slit 236 face the fitting portion 15 in a direction parallel to the rotation axis L2, and the fastener through hole 213 of the fixing tube 21 is adjacent to the guide portion 14, and the guide portion 14 extends into the fastener through hole 213. The elastic end 421 of the elastic sheet portion 42 is pushed by the rod 2 and is adjacent to the first inner surface segment 114 . The elastic sheet portion 42 and the embedded portion 41 form a force storage angle θ1 , so that the biasing member 4 stores elastic energy.

[0056] See also Figure 1 , Figure 7 ,and Fig.10 When the folding device 100 is in a folded state, the support rod 20 and the rod 2 are folded into a columnar shape and parallel to the first axial direction Z, the length of the support rod 20 and the rod 2 is contracted, the connecting rod unit 30 and the riding unit 40 are contracted and not unfolded, and the pivot rod device 10 with a locking function is in a locked state. When the pivot rod device 10 with a locking function is in the locked state, the rod 2 is shortened and located in the preparatory position, the retracted hole 222 of the moving tube 22 is away from the locking hole 212 of the fixed tube 21, the moving tube 22 abuts against the abutting end 321 of the locking portion 32, the engaging end 322 of the locking portion 32 is away from the locking hole 212 and extends into the engaging portion 15 for engagement, the locking portion 32 is coupled with the engaging portion 15, so that the rod 2 cannot rotate relative to the seat body 11.

[0057] Since the locking portion 32 is extended and inserted into the fitting portion 15 in a direction parallel to the rotation axis L2, and the rotation direction of the rod 2 is perpendicular to the extension direction of the locking portion 32, when the rod 2 is pushed in its rotation direction, the fitting end 322 of the locking portion 32 is not easy to be separated from the fitting portion 15. In addition, since the fixing section 311 is embedded in the groove 234 of the pivot seat 23, the fixing section 311 is limited by the groove 234, which can prevent the locking member 3 from rotating relative to the pivot seat 23 around the rotation axis L2 and causing deviation when the rod 2 is pushed, and can more effectively fix the position of the rod 2.

[0058] See also Figures 11 to 13 The folding device 100 is in an extended state, which is different from the folded state in that the rod 2 and the support rod 20 are extended together, and the pivot device 10 with a locking function is transformed into a free state. When the pivot rod device 10 with locking function is in the free state, the rod 2 is extended and located in the preparatory position, the retraction hole 222 of the movable tube 22 is aligned with the locking hole 212 of the fixed tube 21, the abutting end 321 of the locking portion 32 extends into the retraction hole 222, the embedding end 322 of the locking member 3 is adjacent to the locking hole 212 and disengaged from the embedding portion 15, the buckling hole 223 of the movable tube 22 is aligned with the fastener hole 213, the convex buckle portion 53 of the buckle unit 5 is aligned with the fastener hole 213 of the fixed tube 21 and abuts against the tip 142 of the guide portion 14, and the guide portion 14 squeezes the convex buckle portion 53 into the buckling hole 223. At this time, the locking portion 32 is decoupled from the engaging portion 15 , the elastic sheet portion 42 of the biasing member 4 can push the rod 2 to rotate relative to the seat body 11 , and the movable tube 22 can still move relative to the fixed tube 21 .

[0059] Next, the relative positions and the connection relationship of the components of the pivot device 10 with a locking function are described when the rod 2 rotates relative to the seat body 11 around the rotation axis L2 to a swing position.

[0060] See also Fig.14 ,and Fig.15, the folding device 100 is in an unfolded state, and the rod 2 rotates to the swing position relative to the base 11, at which time the rod 2 forms an inclination angle θS with the first axial direction Z, and the side of the rod 2 facing the first inner surface segment 114 abuts against the portion of the first inner surface segment 114 adjacent to the second end surface 113, and is spaced from the portion of the first inner surface segment 114 adjacent to the first end surface 112. The side of the rod 2 facing the second inner surface segment 115 abuts against the portion of the second inner surface segment 115 adjacent to the first end surface 112, and is spaced from the portion of the second inner surface segment 115 adjacent to the second end surface 113. The locking member through hole 212 is away from the fitting portion 15, and the fastener through hole 213 of the fixing tube 21 is away from the guiding portion 14. The elastic end 421 of the elastic sheet portion 42 pushes against the rod 2 and away from the first inner surface section 114 , and the elastic sheet portion 42 and the embedded portion 41 form a release angle θ2 that is larger than the force storage angle θ1 .

[0061] In combination with the above description, it can be known that when the rod 2 is located at the preparatory position, the biasing force applied to the rod 2 by the biasing member 4 will constantly drive the rod 2 to rotate to the swing position.

[0062] The difference from the folding device 100 in the extended state is that the rod 2 and the support rod 20 rotate and unfold relative to the seat body 11 and cross each other obliquely, the connecting rod unit 30 is driven by the rod 2 and the support rod 20 to unfold, the riding unit 40 is driven by the connecting rod unit 30 to unfold, and the pivot rod device 10 with a locking function is transformed into a fixed state. When the pivot rod device 10 with a locking function is in the fixed state, the rod 2 is extended and located in the swing position, and the convex buckle portion 53 extends out of the buckle through hole 213, so that the moving tube 22 cannot move relative to the fixed tube 21. Since the axle pin 511 is relatively adjacent to the side of the movable tube 22 adjacent to the buckling hole 223, when the protruding portion 53 protrudes from the buckling hole 223, the spring portion 522 provided with the protruding portion 53 is approximately parallel to the central axis L1, and the protruding direction of the protruding portion 53 is approximately perpendicular to the central axis L1, so the protruding portion 53 can smoothly protrude from the buckling hole 223 and the fastener through hole 213 without being stuck.

[0063] See also Fig.10 , Fig.12 , Fig.13 , Fig.15, the process of the folding device 100 changing from the folded state to the unfolded state is described as follows. When the folding device 100 is in the folded state, the pivot rod device 10 with a locking function is in the locked state. Then, the rod 2 and the support rod 20 are stretched, the pivot rod device 10 with a locking function changes from the locked state to the free state, and the folding device 100 changes from the folded state to the extended state. Then, the rod 2 and the support rod 20 are released, the elastic energy stored in the biasing member 4 is released, the spring sheet portion 42 pushes the rod 2, so that the rod 2 rotates to the swing position and drives the support rod 20 to rotate and unfold, the convex buckle portion 53 of the buckle unit 5 slides along the guide portion 14 and extends out of the buckle through hole 213, automatically fixing the length of the rod 2, the pivot rod device 10 with a locking function changes from the free state to the fixed state, and the folding device 100 changes from the extended state to the unfolded state.

[0064] See also Fig.13 , Fig.15 ,and Fig.16 The process of changing the folding device 100 from the unfolded state to the folded state is described as follows. The user first pulls the support rod 20 and the rod 2 together to form a column, so that the rod 2 rotates from the swing position to the preparatory position, and the pivot device 10 with a locking function changes from the fixed state to the free state, and the folding device 100 changes from the unfolded state to the extended state. During the rotation of the rod 2, the convex buckle 53 of the buckle unit 5 will first abut against the guide bevel 141 of the guide portion 14, and then slide along the guide bevel 141 to abut against the tip 142 of the guide portion 14, so that the convex buckle 53 is pressed into the buckle hole 223 by the guide portion 14, and then the rod 2 and the support rod 20 can be shortened, so that the pivot device 10 with a locking function is changed from the free state to the locked state, and the folding device 100 is changed from the extended state to the folded state, so as to quickly and labor-savingly complete the action of folding the folding device 100. It should be noted that since the user only needs to pull the rod 2 to allow the convex buckle 53 to be pressed into the buckle hole 223 by the guide portion 14, there is no need to manually press the convex buckle 53 during the process of folding the folding device 100, which not only improves the convenience of operation, but also avoids the risk of fingers being pinched during the pressing process.

[0065] In summary, through the locking member 3 disposed on the rod 2 and the engaging portion 15 disposed on the base 11, the pivot device 10 with a locking function can quickly and easily fix the rod 2 to the base 11 to fold the folding device 100. Through the biasing member 4 disposed on the base 11, the pivot device 10 with a locking function also has an automatic rotation function. When the locking member 3 is unlocked, the rod 2 can automatically rotate relative to the base 11, thereby driving the folding device 100 to automatically unfold. By means of the buckle unit 5 provided on the moving tube 22 and the guide portion 14 provided on the seat body 11, the pivot device 10 with a locking function also has an automatic fixing function. When the rod 2 rotates and the folding device 100 is unfolded, the length of the rod 2 can be automatically fixed, and when the folding device 100 is folded, the convex buckle portion 53 of the buckle unit 5 can be automatically squeezed by the guide portion 14 to facilitate the subsequent retraction of the rod 2. That is, by applying the pivot device 10 with a locking function of the present invention to the folding device 100, the folding device 100 can be quickly and easily folded or unfolded for use, so as to achieve the effect of saving time and effort, and compared with the existing folding chair, the risk of hand being pinched during operation can also be reduced. In addition, the structures of the locking member 3, the biasing member 4 and the buckle unit 5 are simple. Therefore, the pivot device 10 with a locking function of the present invention also has the advantages of simple structure and low manufacturing cost.

[0066] The above are merely embodiments of the present invention and should not be used to limit the scope of the present invention. All simple equivalent changes and modifications made according to the claims and description of the present invention are still within the scope of the present invention.

Claims

1. A pivot device with a locking function, characterized in that: Include: The mounting seat comprises a seat body, a through hole penetrating the seat body along a first axial direction, and an engaging portion disposed on the seat body and adjacent to the through hole; A rod member passes through the through hole and extends along the central axis, the rod member includes a fixing tube extending into the through hole and surrounding the central axis, the fixing tube can be pivotally connected to the seat body around a rotation axis that intersects the central axis and the first axial direction, and the fixing tube has a locking through hole that penetrates radially, the rod member can rotate relative to the seat body between a preparation position and a swing position, when the rod member is located at the preparation position, the rod member is parallel to the first axial direction, and the locking through hole faces the fitting portion, when the rod member is located at the swing position, the rod member and the first axial direction are at an inclined angle, and the locking through hole is away from the fitting portion; and The locking member includes a locking portion movably arranged in the locking member through hole. When the pivot rod device is in a free state, the locking portion moves toward the locking member through hole and is decoupled from the engaging portion, and the rod can rotate relative to the base body. When the pivot rod device is in a locked state, the rod is located in the preparatory position, the locking portion moves toward the engaging portion and is coupled to the engaging portion, and the rod cannot rotate relative to the base body.

2. The pivot rod device with locking function according to claim 1, characterized in that: The rod also includes a moving tube that can be movably penetrated in the fixed tube and around the central axis, the moving tube has a retraction hole that penetrates radially, the locking piece also includes an elastic part that is fixed to the fixed tube and connected to the locking part, the locking part has an abutment end adjacent to the moving tube, and an embedding end opposite to the abutment end and protruding from the locking piece through hole, the elastic part has a biasing force that constantly drives the locking part to move toward the moving tube, when the pivot rod device is in the free state, the retraction hole of the moving tube is aligned with the locking piece through hole of the fixed tube, the abutment end of the locking part extends into the retraction hole, and the embedding end of the locking piece is adjacent to the locking piece through hole, when the pivot rod device is in the locked state, the retraction hole of the moving tube is away from the locking piece through hole of the fixed tube, the moving tube abuts against the abutment end of the locking part, and the embedding end of the locking part is away from the locking piece through hole and coupled to the embedding part.

3. The pivot rod device with locking function according to claim 1, characterized in that: The seat body has an inner circumferential surface surrounding and defining the through hole, and the engaging portion is a groove formed on the inner circumferential surface of the seat body and used for the locking portion to extend into.

4. The pivot rod device with locking function according to claim 2, characterized in that: The locking element through hole and the retraction hole penetrate in a radial direction parallel to the rotation axis.

5. The pivot rod device with locking function according to claim 2, characterized in that: The locking member is a spring sheet formed by bending twice, the elastic portion has a fixed section fixed to the fixed tube, and an elastic section extending obliquely from the fixed section toward the movable tube, the abutting end of the locking portion is bent and connected to an end of the elastic section opposite to the fixed section.

6. The pivot rod device with locking function according to claim 5, characterized in that: The seat body has an inner circumferential surface surrounding and defining the through hole, and the rod member also includes a pivot seat surrounding and fixedly connected to the fixing tube and pivotally connected to the seat body, the pivot seat having an outer surface facing the inner circumferential surface of the seat body, an inner surface opposite to the outer surface and surrounding the fixing tube, and a slit extending from the outer surface to the inner surface and aligned with the locking member through hole, the fixing section of the elastic portion is fixedly disposed between the pivot seat and the fixing tube and adjacent to the locking member through hole, and the locking portion of the locking member can movably extend into the slit.

7. The pivot rod device with locking function according to claim 6, characterized in that: A groove extending in a direction parallel to the central axis is formed on the inner surface of the pivot seat, and the fixing section is embedded in the groove extending in a direction parallel to the central axis.

8. The pivot rod device with locking function according to claim 6, characterized in that: A pivot groove is also formed on the inner circumferential surface of the seat body, and the pivot seat also has a pivot block protruding from the outer surface and rotatably clamped in the pivot groove.

9. The pivot rod device with locking function according to claim 5, characterized in that: The angle between the elastic segment and the fixing segment of the elastic portion is greater than 90 degrees and less than 180 degrees, and the bending angle of the abutting end of the locking portion is less than 90 degrees.

10. The pivot rod device with locking function according to claim 1, characterized in that: The seat body has an inner circumferential surface surrounding the through hole, a first end surface connected to one side of the inner circumferential surface along the first axial direction, and a second end surface connected to the side of the first end surface opposite to the inner circumferential surface along the first axial direction, the rotation axis extends along a second axial direction perpendicular to the first axial direction, the inner circumferential surface has a first inner surface segment located on one side of the through hole along a third axial direction perpendicular to the first axial direction and the second axial direction, a second inner surface segment located on the other side of the through hole along the third axial direction, and a connecting surface segment connected between the first inner surface segment and the second inner surface segment and for the fixed tube to be pivotally connected, the first inner surface segment and the second inner surface segment extending obliquely relative to the first axial direction, and when the rod is in the preparation position, the rod faces the One side of the first inner surface segment abuts against a portion of the first inner surface segment adjacent to the first end surface and is spaced from a portion of the first inner surface segment adjacent to the second end surface, and one side of the rod member facing the second inner surface segment abuts against a portion of the second inner surface segment adjacent to the second end surface and is spaced from a portion of the second inner surface segment adjacent to the first end surface; when the rod member is in the swing position, one side of the rod member facing the first inner surface segment abuts against a portion of the first inner surface segment adjacent to the second end surface and is spaced from a portion of the first inner surface segment adjacent to the first end surface, and one side of the rod member facing the second inner surface segment abuts against a portion of the second inner surface segment adjacent to the first end surface and is spaced from a portion of the second inner surface segment adjacent to the second end surface.

11. The pivot rod device with locking function according to claim 1, characterized in that: The pivot device also includes a biasing member arranged on the seat body, the biasing member has a biasing force that constantly drives the rod to rotate toward the swing position, and when the pivot device changes from the locked state to the free state, the biasing member drives the rod to rotate to the swing position.

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