TW202406765A - Caster with a circular positioning structure - Google Patents

Abstract

A caster with a circular positioning structure, which drives a driving rod and a driving piece to rotate by stamping pedals, so as to make a positioning pin of the driving piece moved periodically between first, second and path points of a positioning piece, so that a cam unit is pushed against an axis, thereby, the positioning piece and a directional hole will be engaged with or separated from each other, and a locking end of a locking member will be locked with or separated from a locking slot, achieving the effect of stopping, preventing the caster from rotating or loosing.

Description

Casters with circulating positioning structure

The present invention relates to the technical field of wheel sets, and in particular to a caster with a cyclic positioning structure.

Generally, in order to make the carrier (hospital bed, precision instrument or workbench, etc.) move easily and save labor, casters are usually provided under the carrier. After the carrier moves to a fixed point through the casters, the casters must be fixed through additional stoppers. The aforementioned stoppers The main purpose is to depress the brake pedal to achieve the effect of stopping the casters. When the casters need to be released, there is also a release pedal that can be pressed to release the casters. However, the positions of the brake pedal and the release pedal are close to each other, so it is easy to step on the wrong pedal. problem.

In view of this, it is indeed necessary to provide a technical means to solve the aforementioned problems.

The purpose of the present invention is to solve the problem that casters are easily stepped on incorrectly because the casters are stopped or released through two different pedals.

In order to solve the aforementioned problems, the present invention is a caster with a cyclic positioning structure, including:

A driving component has a driving rod pivotally connected to a bracket, and a driving piece fixed on the driving rod. The driving piece has a protruding portion and a positioning bolt provided on the protruding portion;

A positioning piece has a pivot portion pivotally connected to the bracket through a pivot rod. The positioning piece has a first positioning portion protruding toward the driving piece. The first positioning portion is closer to the side of the pivot rod and A first positioning point is formed between the sides of the pivot part. The positioning member has a second positioning part connecting the first positioning part and the pivot part. The second positioning part and the first positioning part A second positioning point is formed between them, and the second positioning part has a guide slope inclined toward the bracket. The positioning member has a third positioning part, and the third positioning part is connected to the pivot part. The third positioning part is connected to the second positioning part, and a path point is formed between the third positioning part and the second positioning part;

An elastic member is sleeved on the pivot rod, one end of the elastic member is fixed on the bracket, and the other end of the elastic member is fixed on the positioning member;

A cam unit has a cam fixedly connected to the driving rod. The cam has a first positioning portion and a second positioning portion recessed from the edge. The first positioning portion has a first bottom surface, and the second positioning portion It has a second bottom surface, the distance between the first bottom surface and the driving rod is greater than the distance between the second bottom surface and the driving rod, and the cam unit also has a resisting member that continuously abuts the cam;

An axis abuts against the resisting member;

A directional unit has a directional piece that is sleeved on the axis and fixed, and a positioning piece that is sleeved on the axis and moves with the axis. The directional member has a directional hole through which the spindle passes. , the positioning piece has a locking portion protruding from the periphery;

A caster set is fixedly connected to the axis.

In a preferred embodiment, the elastic member is a torsion spring.

In a preferred embodiment, the caster set has a caster for rolling on the ground.

In a preferred embodiment, the driving assembly also has a pedal structure provided on the driving rod. The pedal has two side plates fixedly connected to the driving rod, and a pedal connected to the two side plates.

In a preferred embodiment, the driving component further has a contraction spring, one end of the contraction spring is fixed on the driving piece, and the other end of the contraction spring is fixed on the bracket.

In a preferred embodiment, the cross section of the driving rod is polygonal, and the driving piece has a polygonal hole. The driving piece is inserted into the driving rod through the polygonal hole and fixed.

In a preferred embodiment, the positioning member further has a hook portion connected to the third positioning portion, the hook portion has a hook surface facing the driving rod, and a hook is formed between the hook portion and the first positioning portion. The hook surface is inclined toward the opening.

The user drives the driving piece to rotate by stepping on the pedal, causing the positioning bolt of the driving piece to move cyclically between the first positioning point, the second positioning point, and the path point, thereby driving the cam unit to push against the axis center, allowing the positioning The piece and the directional hole engage or disengage with each other, thereby achieving the effect of stopping or releasing the caster.

Please refer to Figures 1 to 10. The present invention is a caster with a cyclic positioning structure, which mainly has a driving assembly 10, a positioning member 20, an elastic member 30, a cam unit 40, an axis 50, and a direction unit 60. and caster set 70, including:

The driving assembly 10 has a bracket 11 and a driving rod 12 pivotally connected to the bracket 11, and a driving piece 13 fixed on the driving rod 12. The driving piece 13 has a protruding portion 131 and is located on There is a positioning bolt 132 on the protruding portion 131. Preferably, the positioning bolt 132 is slightly protruding from the driving piece 13, wherein the extending direction of the bracket 11 and the driving rod 12 is defined as a transverse direction Y.

The positioning member 20 is pivotally connected to the bracket 11 through a pivot rod 21. The positioning member 20 has an opposite first end 20A and a second end 20B, and an extension between the first end 20A and the second end 20B. The direction is a height direction Z, and the height direction Z is perpendicular to the transverse direction Y. The first end 20A is pivotally connected to the bracket 11. The positioning member 20 has a pivot portion 22, and the pivot portion 22 passes through the pivot portion. The rod 21 is pivotally connected to the bracket 11, and the first end 20A is located at the pivot portion 22. The positioning member 20 also has a first positioning portion 23. The first positioning portion 23 is connected to the pivot portion 22 and is closer to the pivot portion 22. On one side of the driving rod 12, the first positioning portion 23 extends along a longitudinal direction X, and the longitudinal direction X is perpendicular to the transverse direction Y, so that the first positioning portion 23 extends toward the driving rod 12. The first positioning portion A first positioning point P1 is formed between the side of 23 that is closer to the pivot rod 21 and the side of the pivot portion 22 that is closer to the driving rod 12. The positioning member 20 also has a connection between the first positioning portion 23 and the driving rod 12. A second positioning part 24 of the pivot part 22 forms a second positioning point P2 between the second positioning part 24 and the first positioning part 23, please refer to FIG. 7B, and the second positioning part 24 has a direction facing the The bracket 11 has an inclined guide slope 241. The positioning member 20 also has a third positioning portion 25. The third positioning portion 25 is connected to the pivot portion 22. The pivot portion 22 and the third positioning portion 25 Connected along the height direction Z, the second end 20B is located at the third positioning part 25, the third positioning part 25 is also connected to the second positioning part 24, and the third positioning part 25 and the second positioning part 24 A path point P3 is formed between them.

In a preferred embodiment, the first positioning portion 23 has a guide arc surface 231 on a side closer to the pivot rod 21 , and the guide arc surface 231 is adjacent to the first positioning point P1.

The elastic member 30 is sleeved on the pivot 21, one end of the elastic member 30 is fixed on the bracket 11, and the other end of the elastic member 30 is fixed on the positioning member 20; in this embodiment, the elastic member 30 is A torsion spring is fixed on the positioning member 20 and the bracket 11 respectively through the fixed legs at both ends of the torsion spring. Through the elasticity of the torsion spring, the positioning member 20 can be pulled toward the driving rod 12 .

Referring to Figures 9 and 10, the cam unit 40 has a cam 41 fixedly connected to the driving rod 12. The cam 41 has a first positioning portion 411 and a second positioning portion 412 recessed from the edge. The first positioning portion 411 is recessed from the edge. The portion 411 has a first bottom surface 4111, the second positioning portion 412 has a second bottom surface 4121, and the distance between the first bottom surface 4111 and the driving rod 12 is greater than the distance between the second bottom surface 4121 and the driving rod 12. distance, the cam unit 40 also has a resisting member 42 that continuously abuts the cam 41 .

One end of the axis 50 is connected to the resisting member 42 , the end of the axis 50 connecting to the resisting member 42 is defined as a first end 51 , and the other end of the axis 50 is a second end 52 .

The directional unit 60 has a directional member 61 that is sleeved on the axis 50 and fixed, and a positioning piece 62 that is sleeved on the axis 50 and displaced along with the axis 50 . The directional member 61 has an opening for the There is a directional hole 611 through which the axis 50 passes. The positioning piece 62 has a latching portion 621 protruding from the periphery. The latching portion 621 is provided for being clipped in the directional hole 611 .

The caster set 70 is connected to the driving assembly 10; in this embodiment, the caster set 70 has a caster 71, which is used to roll on the ground. The caster 71 has a locking gear 72 on the inside. The teeth 72 are generally circular, and the outer periphery of the locking teeth 72 has a plurality of locking grooves 721 .

A locking part 80 is generally a piece. The locking part 80 is pivotably installed on the caster set 70. The locking part 80 has an opposite resisting end 81 and a locking end 82. The second end 52 of the axis 50 is against the resisting end 81, and the locking end 82 is provided to be locked in the locking groove 721 to stop the caster 71. When the locking end 82 moves away from When the locking groove 721 is formed, the caster 71 is in a rolling state.

In this embodiment, please refer to FIG. 1 . The driving assembly 10 also has a stepping structure 14 provided on the driving rod 12 . The stepping structure 14 has two side plates 141 fixedly connected to the driving rod 12 , and the two side plates 141 are connected to the driving rod 12 . A pedal 142 of the side plate 141 can rotate the driving rod 12 by stepping on the pedal 142 .

Secondly, the driving assembly 10 also has a contraction spring 15 extending along the longitudinal direction X. One end of the contraction spring 15 is fixed to the driving piece 13 and the other end of the contraction spring 15 is fixed to the bracket 11 , the contraction spring 15 pulls the driving piece 13, and after the stepping structure 14 is stepped on and released, the contraction spring 15 can drive the driving piece 13 to return.

Furthermore, the cross section of the driving rod 12 is polygonal, and the driving piece 13 has a polygonal hole 133. The driving piece 13 is inserted into the driving rod 12 through the polygonal hole 133, so that the driving piece 13 is fixedly connected to the driving rod. 12, and will be driven along with the rotation of the driving rod 12.

The positioning member 20 also has a hook portion 26 connected to the third positioning portion 25 . The hook portion 26 has a hook surface 261 facing the driving rod 12 . A gap is formed between the hook portion 26 and the first positioning portion 23 . The hook surface 261 is inclined toward the opening 27 . When the user steps on the pedal 142 and causes the positioning pin 132 to move along the guide arc surface 231 to abut against the hook surface 261 , the positioning pin 132 will be moved. The hook surface 261 is guided to fall into the opening 27 so that the positioning pin 132 can be positioned at the second positioning point P2.

The above is the structural configuration and connection relationship of the present invention in a preferred embodiment. The usage of the present invention and the effects it can produce are as follows:

Please refer to Figure 3. In the released state, the caster 71 can rotate arbitrarily, and the positioning bolt 132 is located at the first positioning point P1 and abuts against the first positioning portion 23. Please refer to Figure 9. The distance between the bottom surface 4111 and the driving rod 12 is greater than the distance between the second bottom surface 4121 and the driving rod 12 . At this time, the resisting member 42 is pressed against the second bottom surface 4121 , so that the resisting member 42 Closer to the driving rod 12 , at this time, the positioning piece 62 is away from the orientation hole 611 . Since the positioning piece 62 is not restricted by the orientation hole 611 , the caster set 70 can rotate freely. At the same time, the locking end 82 It is not locked in the locking groove 721, so the caster 71 can move freely.

Please refer to Figures 3 and 4. When the user steps on the pedal 142, the pedal 142 drives the driving rod 12 to rotate, and the driving rod 12 drives the driving piece 13 to rotate, so that the positioning bolt 132 moves from the first positioning point P1 The positioning pin 132 begins to move along the guide arc surface 231 and moves toward the opening 27 . When the positioning pin 132 moves along the guide arc surface 231 , it abuts against the guide arc surface 231 , because the positioning pin 132 is from the driving piece 13 Slightly protruding, when the positioning pin 132 is displaced along the guide arc surface 231, the positioning member 20 is pushed by the positioning pin 132 and pivots in the longitudinal direction X with the pivot rod 21 as the pivot center, so that the positioning pin 132 The positioning bolt 132 moves from the guide arc surface 231 to the hook surface 261, and the user releases the pedal 142. Please refer to FIG. 5, because the first positioning portion 23 is moved by the hook surface 261. The elastic member 30 is driven to rotate toward the driving rod 12 , and the positioning pin 132 will be guided by the hook surface 261 and fall into the opening 27 , thereby allowing the positioning pin 132 to be positioned at the second positioning point P2 .

Referring to FIG. 10 , since the cam 41 is driven to rotate, the first bottom surface 4111 of the cam 41 abuts the resisting member 42 , because the distance between the first bottom surface 4111 and the driving rod 12 is greater than the second The distance between the bottom surface 4121 and the driving rod 12 causes the resisting member 42 to be pushed, thereby driving the axis 50 to move away from the driving rod 12 and driving the positioning piece 62 to fall into the directional hole 611 Since the positioning piece 62 is restricted by the orientation hole 611 and cannot rotate circumferentially, the shaft 50 fixedly connected to the positioning piece 62 cannot rotate circumferentially, so that the caster set 70 cannot rotate arbitrarily. At this time, , the locking end 82 is also locked in the locking groove 721, so the caster 71 is in a stopped state.

Please refer to Figures 6, 7A, and 7B. When the user steps on the pedal 142 again, the positioning bolt 132 leaves the second positioning point P2 and abuts against the third positioning portion 25. When the user releases the pedal 142, , because the contraction spring 15 is pulled to rotate the driving piece 13 and move the positioning pin 132 to the path point P3.

Please refer to Figures 8A and 8B. When the positioning pin 132 is located at the path point P3, the positioning pin 132 is guided by the guide slope 241, and the positioning pin 132 is pushed against the positioning member 20, so that the positioning member 20 The elastic member 30 is deflected outward along the transverse direction Y to compress the elastic member 30, and then is pulled by the contraction spring 15 to allow the driving piece 13 to pivot and return, so that the positioning bolt 132 moves to the first positioning point P1 again, allowing the The caster set 70 returns to a freely movable and rotatable state.

10:Drive components 11: Bracket 12:Driving rod 13: Driver piece 131:Protruding part 132: Positioning bolt 133:Poly side hole 14: Trampling structure 141:Side panel 142:pedal 15:Contraction spring 20: Positioning parts 20A: first end 20B:Second end 21: Pivot 22: Pivot joint 23:First positioning department 231:Guide arc surface 24:Second positioning department 241:Guide slope 25:The third positioning department 26: hook part 261: Hook noodles 27:Open your mouth 30: Elastic parts 40: Cam unit 41:Cam 411:First Positioning Department 4111:First bottom surface 412:Second positioning department 4121:Second bottom surface 42:Received items 50:Axis 51:First end 52:Second end 60: Orientation unit 61: Orientation parts 611: Directional hole 62: Positioning film 621:Card Design Department 70: Caster set 71: casters 72: Locking gear parts 721:Latching groove 80: blocking piece 81: Resisted end 82: blocking end P1: first positioning point P2: second anchor point P3: way point X: portrait Y: Horizontal Z: Height direction

Figure 1 is a perspective view of the present invention in a preferred embodiment; Figure 2 is a side view of the present invention in a preferred embodiment; Figure 3 is a partially enlarged side view of the present invention in a preferred embodiment; Figure 4 is a side view of the positioning bolt moving from the first positioning point to the second positioning point; Figure 5 is a side view of the positioning bolt positioned at the second positioning point; Figure 6 is a side view of the positioning bolt leaving the second positioning point; Figure 7A is a side view of the positioning pin moving to the path point; Figure 7B is a cross-sectional view based on the cross-section line of Figure 7A; Figure 8A is a side view of the positioning bolt pushing the positioning member to compress the elastic member; Figure 8B is a cross-sectional view based on the cross-section line of Figure 8A; Figure 9 is a side cross-sectional view of the caster set in a released state; Figure 10 is a side cross-sectional view of the caster set in a stop and positioning state.

11: Bracket

12:Driving rod

13: Driver piece

131:Protruding part

132: Positioning bolt

14: Trampling structure

141:Side panel

142:pedal

15:Contraction spring

20: Positioning parts

20A: first end

20B:Second end

21: Pivot

22: Pivot joint

23:First positioning department

231:Guide arc surface

24:Second positioning department

25:The third positioning department

26: hook part

70: Caster set

71: casters

X: portrait

Z: Height direction

Claims (7)

A caster with a cyclic positioning structure, including: A driving component has a driving rod pivotally connected to a bracket, and a driving piece fixed on the driving rod. The driving piece has a protruding portion and a positioning bolt provided on the protruding portion; A positioning piece has a pivot portion pivotally connected to the bracket through a pivot rod. The positioning piece has a first positioning portion protruding toward the driving piece. The first positioning portion is closer to the side of the pivot rod and A first positioning point is formed between the sides of the pivot part. The positioning member has a second positioning part connecting the first positioning part and the pivot part. The second positioning part and the first positioning part A second positioning point is formed between them, and the second positioning part has a guide slope inclined toward the bracket. The positioning member has a third positioning part, and the third positioning part is connected to the pivot part. The third positioning part is connected to the second positioning part, and a path point is formed between the third positioning part and the second positioning part; An elastic member is sleeved on the pivot rod, one end of the elastic member is fixed on the bracket, and the other end of the elastic member is fixed on the positioning member; A cam unit has a cam fixedly connected to the driving rod. The cam has a first positioning portion and a second positioning portion recessed from the edge. The first positioning portion has a first bottom surface, and the second positioning portion It has a second bottom surface, the distance between the first bottom surface and the driving rod is greater than the distance between the second bottom surface and the driving rod, and the cam unit also has a resisting member that continuously abuts the cam; An axis connects the resisting member; A directional unit has a directional piece that is sleeved on the axis and fixed, and a positioning piece that is sleeved on the axis and moves with the axis. The directional member has a directional hole through which the spindle passes. , the positioning piece has a locking portion protruding from the periphery; A caster set is fixedly connected to the driving assembly. The caster with a cyclic positioning structure as claimed in claim 1, wherein the elastic member is a torsion spring. The caster with a cyclic positioning structure as described in claim 1, wherein the caster set has a caster for rolling on the ground. The caster with a cyclic positioning structure as claimed in claim 1, wherein the driving assembly also has a stepping structure provided on the driving rod, the stepping structure has two side plates fixedly connected to the driving rod, and the two side plates are connected to the driving rod. One pedal on the side panel. The caster with a cyclic positioning structure as claimed in claim 1, wherein the driving component further has a contraction spring, one end of the contraction spring is fixed to the driving piece, and the other end of the contraction spring is fixed to the bracket. The caster with a cyclic positioning structure as claimed in claim 1, wherein the cross section of the driving rod is polygonal, the driving piece has a polygonal hole, and the driving piece is inserted into the driving rod through the polygonal hole and fixed. The caster with a cyclic positioning structure as described in claim 1, wherein the positioning member also has a hook portion connected to the third positioning portion, the hook portion has a hook surface facing the driving rod, and the hook portion is connected to the third positioning portion. An opening is formed between the first positioning parts, and the hook surface is inclined toward the opening.

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