Pivot rod device with automatic fixing releasing function

Abstract

The invention relates to a pivot rod device with an automatic fixing releasing function. The pivot rod device comprises a mounting seat, a rod piece and a buckling piece, the mounting base comprises a base body, a through hole penetrating through the base body and a guide part arranged on the base body. The rod piece penetrates through the through hole and comprises a fixed pipe extending into the through hole and a movable pipe arranged in the fixed pipe in a penetrating mode. The fixed pipe is provided with a penetrating hole penetrating in the radial direction, and the movable pipe is provided with a buckling hole. And the buckling piece is arranged in the movable pipe and is provided with a convex buckling part which elastically extends out of the buckling hole, when the pivot rod device is in a fixed state, the through hole of the fixed pipe is far away from the guide part, the buckling hole is aligned with the through hole, the convex buckling part extends out of the through hole, and the convex buckling part extends out of the through hole. When the pivot rod device is in a free state, the convex buckling part is pushed by the guide part to move until the movable pipe can move relative to the fixed pipe, so that the effect of automatically releasing the fixation of the rod piece is achieved.

Description

Technical Field

[0001] The invention relates to a pivot rod device, in particular to a pivot rod device with an automatic releasing and fixing function. Background Art

[0002] An existing folding chair as disclosed in Taiwan's new patent No. M427867U includes a fixed seat, three support members rotatably inserted into the fixed seat, and a cloth body disposed on the top of the support member. Each of the support members has an outer tube, an inner tube movably inserted into the outer tube, and an adjustment rod. Each of the outer tubes has a through hole. Each of the inner tubes has a plurality of grooves. Each of the adjustment rods passes through the corresponding through hole and is fixed to the corresponding groove to fix the length of the support member. When the folding chair is folded, the support members are folded into a columnar shape, and the inner tube of each of the support members is retracted into the corresponding outer tube.

[0003] The disadvantage of the folding chair is that when a user wants to use the folding chair and adjust the length of the support member, the user needs to first rotate and unfold the support member, then pull the adjustment rod in sequence, pull out the inner tube and then insert the adjustment rod back into the through hole of the outer tube to adjust the length of the support member, which is quite time-consuming and labor-intensive. Summary of the invention

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

[0005] The pivot rod device with automatic releasing function described in the present invention comprises a mounting seat, a rod, and a buckle, wherein the mounting seat comprises a seat body, a through hole penetrating the seat body along a first axial direction, and a guide portion arranged on the seat body, the rod passes through the through hole and extends along the central axis, the rod comprises a fixed tube extending into the through hole and surrounding the central axis, and a movable tube movably penetrated in the fixed tube and surrounding the central axis, the fixed tube can be pivotally connected to the seat body around a rotation axis transverse to the central axis, and the fixed tube has a through hole penetrating in a radial direction, and the movable tube has a through hole penetrating in a radial direction. The buckle hole is arranged in the movable tube and has a convex buckle part which elastically extends out of the buckle hole. When the pivot rod device with the automatic releasing fixing function is in the fixed state, the rod and the first axial direction are inclined at an angle. The through hole of the fixed tube is away from the guide part. The buckle hole is aligned with the through hole. The convex buckle part extends out of the through hole. The movable tube cannot move relative to the fixed tube. When the pivot rod device with the automatic releasing fixing function is in the free state, the rod is parallel to the first axial direction. The convex buckle part is pushed by the guide part and moves until the movable tube can move relative to the fixed tube.

[0006] The pivot rod device with automatic releasing function described in the present invention comprises a seat body including an inner circumferential surface surrounding and defining the through hole, a first end face connected to one side of the inner circumferential surface along the first axial direction, a second end face connected to a side of the inner circumferential surface opposite to the first end face along the first axial direction, and an axle seat portion protruding from the first end face, and the guide portion protruding from the axle seat portion toward the through hole.

[0007] The pivot rod device with automatic releasing fixing function described in the present invention, the rod also includes a sleeve surrounding and fixedly connected to the fixing tube, the sleeve having an inner annular surface surrounding the fixing tube, an outer annular surface opposite to the inner annular surface and pivotally connected to the seat body, and a fastener through hole extending from the inner annular surface to the outer annular surface and connected to and aligned with the perforated hole, a groove connected to the fastener through hole is formed on the outer annular surface, the width of the groove matches the width of the guide portion, when the pivot rod device with automatic releasing fixing function is in the fixed state, the convex buckle portion extends out of the fastener through hole, when the pivot rod device with automatic releasing fixing function changes from the fixed state to the free state, the guide portion slides into the groove.

[0008] In the pivot rod device with automatic releasing function of the present invention, the groove extends in a direction perpendicular to the rotation axis and the central axis.

[0009] The pivot rod device with automatic releasing function described in the present invention has the shaft seat portion spaced apart from the through hole along a direction parallel to the rotation axis, the guide portion protrudes along a direction parallel to the rotation axis, and the through hole and the snap-fit ​​hole respectively penetrate the fixed tube and the movable tube along a direction parallel to the rotation axis.

[0010] The pivot rod device with automatic releasing function described in the present invention, the rotation axis extends along a second axial direction perpendicular to the first axial direction, the inner peripheral 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 fixing tube to be pivotally connected, the first inner surface segment and the second inner surface segment extend obliquely relative to the first axial direction, when the rod member is parallel to the first axial direction, the side of the rod member facing the first inner surface segment is close to the part of the first inner surface segment adjacent to the first end face, and The rod is spaced from a portion of the first inner surface segment adjacent to the second end surface, and a side of the rod facing the second inner surface segment is close to 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 is inclined at the angle to the first axial direction, the side of the rod facing the first inner surface segment is close to 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 the side of the rod facing the second inner surface segment is close to 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.

[0011] The pivot rod device with automatic releasing fixing function described in the present invention has the guide portion having a narrow section connected to the shaft seat portion and adjacent to the second inner surface section, and a wide section connected to the shaft seat portion and adjacent to the first inner surface section compared to the narrow section. The guide portion extends from the narrow section gradually away from the shaft seat portion to the wide section. When the pivot rod device with automatic releasing fixing function changes from the fixed state to the free state, the convex buckle portion abuts against the guide portion from one side of the narrow section and moves to the wide section, and is squeezed into the through hole by the wide section.

[0012] The pivot rod device with automatic releasing function described in the present invention, the buckle also includes a spring sheet arranged on the movable tube and in a bent shape, the spring sheet has a bent portion and two spring sheet portions connected to two opposite ends of the bent portion, one of the spring sheet portions abuts against the movable tube, and the other is provided for the convex buckle portion to be set.

[0013] The beneficial effect of the present invention is that: by the guide portion arranged on the seat body, when the pivot device is changed from the fixed state to the free state, the convex buckle portion of the buckle can be automatically squeezed into the buckling hole by the guide portion, so that the pivot device is automatically released from fixation, and the movable tube can be retracted into the sleeve, which not only can achieve the effect of simply and quickly retracting the rod member, but also can avoid the risk of being pinched when the user manually presses the convex buckle portion, so the purpose of the present invention can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional composite diagram of a folding device in an unfolded state, the folding device comprising an embodiment of a pivot rod device with an automatic release function of the present invention, two support rods, and a connecting rod unit, and the embodiment is in a fixed state;

[0015] Figure 2 yes Figure 1 A partial enlarged view of

[0016] Figure 3 is a perspective exploded view of the embodiment;

[0017] Figure 4 is from Figure 1 A partial side view viewed from another angle;

[0018] Figure 5 is along Figure 4 A partial cross-sectional view taken along line VV in FIG. 1 , but omitting the support rod;

[0019] Figure 6 is from Figure 1 A partial side view viewed from another angle;

[0020] Figure 7 is along Figure 6 A sectional view taken along line VII-VII in FIG. 1 , but omitting the support rod;

[0021] Figure 8 is an incomplete side view, illustrating that the folding device is in a folded state, the embodiment is in a free state, but one of the support rods and the connecting rod unit is omitted;

[0022] Fig. 9 is along Figure 8 An incomplete cross-sectional view taken along line IX-IX;

[0023] Fig.10 is along Fig. 9 An incomplete cross-sectional view obtained by line XX in;

[0024] Fig.11 is along Figure 8 An incomplete cross-sectional view taken along line XI-XI in FIG. 1 , but omitting the strut;

[0025] Fig.12 is an incomplete stereogram, illustrating the folding device changing from the unfolded state to the folded state, and the embodiment changing from the fixed state to the free state, but omitting one of the support rods and the connecting rod unit; and

[0026] Fig.13 is a similar Fig.12 , indicating that the folding device is in the folded state and the embodiment is in the free state. DETAILED DESCRIPTION

[0027] The present invention is described in detail below with reference to 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 mentioned in the following description are perpendicular to each other, and the first axial direction Z extends up and down.

[0028] See also Figure 1 The embodiment of the pivot device 10 with automatic releasing function of the present invention is applicable to a folding device 100, and the folding device 100 includes the pivot device 10, two supporting rods 20, and a connecting rod unit 30.

[0029] See also Figure 2 ,and Figure 3 The pivot device 10 includes a mounting base 1, a rod 2, and a buckle 3.

[0030] 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 two guide portions 15 disposed on the seat body 11.

[0031] The seat body 11 includes 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, a second end surface 113 connected to the side of the inner circumferential surface 111 opposite to the first end surface 112 along the first axial direction Z, and an axle seat portion 114 protruding from the center of the first end surface 112.

[0032] The through hole 12 and the branch hole 13 are angularly spaced around the shaft seat portion 114. The shaft seat portion 114 is spaced along the second axial direction X and is located inside the through hole 12.

[0033] The inner circumferential surface 111 has a first inner surface segment 1111 located at one side of the through hole 12 along the third axial direction Y, a second inner surface segment 1112 located at the other side of the through hole 12 along the third axial direction Y, and a connecting surface segment 1113 connected between the first inner surface segment 1111 and the second inner surface segment 1112. The second end surface 113 is located below the first end surface 112.

[0034] See also Figures 3 to 5 , defining a rotation axis L1 extending along the second axial direction X and transverse to the connecting surface section 1113, the guide portion 14 protrudes from the shaft seat portion 114 in a direction parallel to the rotation axis L1 toward the through hole 12. The guide portion 14 has a narrow section 141 connected to the shaft seat portion 114 and adjacent to the second inner surface section 1112, and a wide section 142 connected to the shaft seat portion 114 and adjacent to the first inner surface section 1111 compared to the narrow section 141. The guide portion 14 extends from the narrow section 141 to the wide section 142, gradually away from the shaft seat portion 114. The guide catch portions 15 protrude from the shaft seat portion 114 toward the direction of the support hole 13. The guide portion 14 and the guide catch portions 15 are arranged around the shaft seat portion 114 at an angular interval.

[0035] The rod 2 passes through the through hole 12 and extends along a central axis L2 perpendicular to the rotation axis L1. The rod 2 includes a sleeve 21 extending into the through hole 12 and surrounding the central axis L2, a fixed tube 22 fixed in the sleeve 21 and extending upward from the sleeve 21, and a movable tube 23 movably passing through the sleeve 21 and the fixed tube 22 from bottom to top and surrounding the central axis L2. The sleeve 21 can be pivotally connected to the connecting surface section 1113 around the rotation axis L1. Therefore, the sleeve 21, the fixed tube 22 and the movable tube 23 can rotate together, and the fixed tube 22 is indirectly pivotally connected to the seat body 11 via the sleeve 21. The sleeve 21 has an inner annular surface 211 surrounding the moving tube 23, an outer annular surface 212 opposite to the inner annular surface 211 and facing and pivotally connected to the seat body 11, and a fastener through hole 213 extending from the inner annular surface 211 to the outer annular surface 212 in a direction parallel to the rotation axis L1. A groove 214 connected to the fastener through hole 213 is formed on the outer annular surface 212, and the groove 214 extends in a direction perpendicular to the rotation axis L1 and the central axis L2, and the width of the groove 214 matches the width of the guide portion 14.

[0036] The fixed tube 22 surrounds the central axis L2 and has a through hole 221 that penetrates along a direction parallel to the rotation axis L1 (i.e., radial direction) and is aligned with the fastener through hole 213. The movable tube 23 has a snap-fitting hole 231 that penetrates along a direction parallel to the rotation axis L1 (i.e., radial direction). The fastener through hole 213, the through hole 221, and the snap-fitting hole 231 can be connected and aligned and face the side adjacent to the guide portion 14. Therefore, when the movable tube 23 moves, the fastener through hole 213, the through hole 221, and the snap-fitting hole 231 can be aligned with each other, and when the rod 2 rotates, the guide portion 14 can be aligned with the fastener through hole 213, the through hole 221, and the snap-fitting hole 231.

[0037] The buckle 3 is disposed in the moving tube 23 and includes a spring sheet 31 and a convex buckle portion 32. The spring sheet 31 is bent and has a bent portion 311 and two spring sheet portions 312 connected to two opposite ends of the bent portion 311. One of the spring sheet portions 312 abuts against the moving tube 23, and the other is provided for the convex buckle portion 32. The convex buckle portion 32 elastically extends out of the buckling hole 231. The end of the convex buckle portion 32 in the direction away from the spring sheet portion 312 is formed with an arc surface 321.

[0038] See also Figure 1 The support rods 20 pass through the support holes 13 and are pivotally connected to the seat body 11. The connecting rod unit 30 is foldably disposed at the top ends of the rod 2 and the support rods 20.

[0039] The above contents are the structures of the components of the folding device 100 and their actuation relationships with each other. Hereinafter, the relative positions of the components when the folding device 100 is in an unfolded state will be further described as follows.

[0040] See also Figure 1 The rod 2 and the support rod 20 are tilted and staggered and supported on the ground, and the connecting rod unit 30 is unfolded and can be used by the user to sit on.

[0041] See also Figure 2 ,and Figure 5 At this time, the pivot device 10 is in a fixed state, the fastener through hole 213 of the sleeve 21 and the through hole 221 of the fixed tube 22 are away from the guide portion 14, the buckling hole 231 is aligned with the through hole 221 and the fastener through hole 213, and the protruding buckle portion 32 passes through the through hole 221 and extends out of the fastener through hole 213, so that the movable tube 23 cannot move relative to the sleeve 21 and the fixed tube 22.

[0042] See also Figure 6 ,and Figure 7At this time, the rod 2 forms an inclination angle θs with the first axial direction Z. Since the first inner surface segment 1111 and the second inner surface segment 1112 extend obliquely relative to the first axial direction Z, the side of the rod 2 facing the first inner surface segment 1111 is close to the portion of the first inner surface segment 1111 adjacent to the second end surface 113, and is spaced from the portion of the first inner surface segment 1111 adjacent to the first end surface 112. The side of the rod 2 facing the second inner surface segment 1112 is close to the portion of the second inner surface segment 1112 adjacent to the first end surface 112, and is spaced from the portion of the second inner surface segment 1112 adjacent to the second end surface 113.

[0043] The relative positions of the components when the folding device 100 is in a folded state are further described below. Figure 8 , Fig.12 and Fig.13 Only one of the struts 20 is shown.

[0044] See also Figures 8 to 10 At this time, the pivot device 10 is in a free state, the guide portion 14 extends into the fastener through hole 213, and the convex buckle portion 32 is pushed by the guide portion 14 and moves into the buckling hole 231 and the through hole 221. When force is applied to the movable tube 23, the movable tube 23 can be moved relative to the sleeve 21 and the fixed tube 22 and retracted into the fixed tube 22 through the arc surface 321.

[0045] See also Figure 8 ,and Fig.11 At this time, the support rod 20 is parallel to the first axial direction Z of the rod 2, and the side of the rod 2 facing the first inner surface segment 1111 is close to the portion of the first inner surface segment 1111 adjacent to the first end surface 112, and is spaced from the portion of the first inner surface segment 1111 adjacent to the second end surface 113, and the side of the rod 2 facing the second inner surface segment 1112 is close to the portion of the second inner surface segment 1112 adjacent to the second end surface 113, and is spaced from the portion of the second inner surface segment 1112 adjacent to the first end surface 112.

[0046] See also Fig. 9 , Fig.12, and 13, when the folding device 100 changes from the unfolded state to the folded state, the pivot device 10 changes from the fixed state to the free state, and the rod 2 rotates relative to the seat body 11. Since the groove 214 extends in a direction perpendicular to the rotation axis L1 and the central axis L2, that is, the groove 214 extends in a direction perpendicular to the length of the rod 2, the extending direction of the groove 214 corresponds to the guide portion 14 at this time, and the guide portion 14 can slide into the groove 214 in an embedded manner, and the convex buckle portion 32 abuts against the guide portion 14 from one side of the narrow section 141 and moves to the wide section 142, and is squeezed by the wide section 142 into the through hole 221 and the buckle hole 231. Since the width of the groove 214 matches the width of the guide portion 14, the guide portion 14 can slide in the groove 214 in a limited position, thereby preventing the convex portion 32 from slipping and deviating relative to the guide portion 14 when squeezed by the guide portion 14, so that the convex portion 32 can be surely squeezed into the buckling hole 231, further ensuring that the user can smoothly fold the movable tube 23 into the sleeve 21 and the fixed tube 22 to complete the action of folding the folding device 100.

[0047] In this embodiment, each of the support rods 20 has the same structure as the rod 2, and each of the guide portions 15 has the same structure as the guide portion 14. Therefore, when the folding device 100 is changed from the unfolded state to the folded state, each of the support rods 20 can also achieve the effect of automatically releasing the fixation with the rod 2 by abutting against the corresponding guide portion 15.

[0048] In summary, the pivot device 10 with automatic releasing function of the present invention is provided with the guide portion 14 on the base body 11. When the folding device 100 is changed from the unfolded state to the folded state, the convex buckle portion 32 of the buckle 3 can be automatically squeezed into the buckling hole 231 by the guide portion 14, so that the pivot device 10 can automatically release the fixation of the rod 2, and allow the movable tube 23 to be folded into the sleeve 21 and the fixed tube 22. Not only can the effect of simply and quickly folding the rod 2 be achieved, but also the user can avoid relying on manually pressing the convex buckle portion 32, thereby reducing the risk of being pinched, so the purpose of the present invention can be achieved.

[0049] 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 rod device with an automatic release function, comprising a mounting seat, a rod, and a buckle; characterized in that: The mounting seat includes a seat body, a through hole penetrating the seat body along a first axial direction, and a guide portion disposed on the seat body; The rod member passes through the through hole and extends along the central axis, the rod member includes a fixed tube extending into the through hole and surrounding the central axis, and a movable tube movably inserted into the fixed tube and surrounding the central axis, the fixed tube can be pivotally connected to the seat body around a rotation axis that is transverse to the central axis, and the fixed tube has a through hole penetrating in the radial direction, and the movable tube has a buckling hole penetrating in the radial direction; The buckle is arranged in the movable tube and has a convex buckle portion elastically extending out of the buckling hole. When the pivot rod device with the automatic releasing fixing function is in a fixed state, the rod and the first axial direction have an inclined angle, the through hole of the fixed tube is away from the guide portion, the buckling hole is aligned with the through hole, the convex buckle portion extends out of the through hole, and the movable tube cannot move relative to the fixed tube. When the pivot rod device with the automatic releasing fixing function is in a free state, the rod is parallel to the first axial direction, and the convex buckle portion is pushed by the guide portion and moves until the movable tube can move relative to the fixed tube.

2. The pivot rod device with automatic releasing function according to claim 1, characterized in that: The seat body includes an inner circumferential surface surrounding and defining the through hole, a first end face connected to one side of the inner circumferential surface along the first axial direction, a second end face connected to a side of the inner circumferential surface opposite to the first end face along the first axial direction, and an axle seat portion protruding from the first end face, and the guide portion protrudes from the axle seat portion toward the through hole.

3. The pivot rod device with automatic releasing function according to claim 2, characterized in that: The rod also includes a sleeve surrounding and fixedly connected to the fixing tube, the sleeve having an inner annular surface surrounding the fixing tube, an outer annular surface opposite to the inner annular surface and pivotally connected to the seat body, and a fastener through hole extending from the inner annular surface to the outer annular surface and connected to and aligned with the through hole, a groove connected to the fastener through hole is formed on the outer annular surface, the width of the groove matches the width of the guide portion, when the pivot rod device with automatic releasing fixing function is in the fixed state, the convex buckle portion extends out of the fastener through hole, and when the pivot rod device with automatic releasing fixing function changes from the fixed state to the free state, the guide portion slides into the groove.

4. The pivot rod device with automatic releasing function according to claim 3, characterized in that: The groove extends in a direction perpendicular to the rotation axis and the central axis.

5. The pivot rod device with automatic releasing function according to claim 2, characterized in that: The shaft seat portion is spaced apart from the through hole along a direction parallel to the rotation axis, the guide portion protrudes along a direction parallel to the rotation axis, and the through hole and the buckle hole respectively penetrate the fixed tube and the movable tube along a direction parallel to the rotation axis.

6. The pivot rod device with automatic releasing function according to claim 2, characterized in that: 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 parallel to the first axial direction, a side of the rod facing the first inner surface segment is close to a portion of the first inner surface segment adjacent to the first end face, and is adjacent to a portion of the first inner surface segment adjacent to the first end face Parts of the second end face are spaced apart, and a side of the rod member facing the second inner surface segment is close to a portion of the second inner surface segment adjacent to the second end face, and is spaced apart from a portion of the second inner surface segment adjacent to the first end face; when the rod member and the first axial direction comprise the inclination angle, a side of the rod member facing the first inner surface segment is close to a portion of the first inner surface segment adjacent to the second end face, and is spaced apart from a portion of the first inner surface segment adjacent to the first end face; a side of the rod member facing the second inner surface segment is close to a portion of the second inner surface segment adjacent to the first end face, and is spaced apart from a portion of the second inner surface segment adjacent to the second end face.

7. The pivot rod device with automatic releasing function according to claim 6, characterized in that: The guide portion comprises a narrow section connected to the shaft seat portion and adjacent to the second inner surface section, and a wide section connected to the shaft seat portion and adjacent to the first inner surface section compared to the narrow section. The guide portion extends from the narrow section gradually away from the shaft seat portion to the wide section. When the pivot rod device with automatic releasing function changes from the fixed state to the free state, the convex buckle portion abuts against the guide portion from one side of the narrow section and moves to the wide section, and is squeezed into the through hole by the wide section.

8. The pivot rod device with automatic releasing function according to claim 1, characterized in that: The buckle also includes a spring sheet disposed on the moving tube and in a bent shape. The spring sheet has a bent portion and two spring sheet portions connected to two opposite ends of the bent portion. One of the spring sheet portions abuts against the moving tube, and the other is provided for the convex buckle portion to be set.

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