JP3239260U - tightening mechanism - Google Patents

Abstract

A tightening mechanism capable of efficiently tightening and loosening a belt protection mechanism is provided. A tightening mechanism (1) includes an actuator and a rotation adjustment member (30). When the rotary adjustment member rotates in the first direction, the two abutment ribs respectively abut the third positions of the two elastic arms of the actuator, the ratchet teeth of the actuator are in the first position, and the actuator and the rotary adjustment member rotates in the second direction, the two abutment ribs respectively abut against the fourth positions of the two elastic arms of the actuator, and the ratchet teeth engage the second position and close to the central axis. [Selection drawing] Fig. 1

Description

The present invention relates to a tightening mechanism.

The device typically includes an adjustment structure for adjustment to suit the postural needs of the user. By way of non-limiting example, the instep sheet of the waist and back protection garment described in Taiwan Design Patent No. TWD197021 is a member that supports the waist and back of the human body. It can be fixed to the human body only by overlapping and connecting two belts provided facing each other.

However, in the prior art, the fixing structure that connects the two belts to each other may be a hook-and-loop fastener or the like.

Therefore, there is a need to provide a novel and creative tightening mechanism to solve the above problems.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a tightening mechanism that can efficiently tighten and loosen a belt protection mechanism.

In order to achieve the above object, the present invention is provided with a central shaft and two elastic arms, the central shaft is provided with a tooth disk portion protruding in the axial direction, and the elastic arms are Each of the resilient arms extends radially away from the central shaft portion, the central shaft portion being provided with two first limiting portions, each of the resilient arms diametrically extending between a first position and a second position. an actuator provided with ratchet teeth movable in a direction, the two first limits and the two resilient arms respectively being spaced apart; and assembled to the actuator, two second limits and two abutting ribs respectively abutting one of the elastic arms movably between a third position and a fourth position; one of which is a groove and the other of which is a pin portion movably inserted through the groove; When abutting a third position on one of the arms, the ratchet teeth being in the first position and away from the central shaft portion, and the rotary adjustment member rotating in a second direction, the corresponding abutment ribs respectively engage the elastic springs. Abutting a fourth position on one of the arms, the ratchet teeth are in the second position to provide a tightening mechanism that approaches the central shaft.

To achieve the above objectives, the present invention further comprises a first belt section and at least one second belt section movable with respect to the first belt section, wherein the first belt section has a belt protection mechanism provided with a through-hole including an annular tooth, each of said second belt portions being provided with a rack; Each of the elastic arms extends radially away from the central shaft portion and has toothed disc portions that movably mesh with the respective racks of the second belt portion. two first restraints are provided on the central shaft portion, each of the resilient arms is provided with a ratchet tooth that releasably engages with the annular tooth, the ratchet tooth being in a first position and a second position; and wherein the two first restraints and the two resilient arms are respectively spaced apart from each other; assembled to the actuator, the two second restraints and two each abutting rib movably between a third position and a fourth position and abutting one of the elastic arms; one of which is a groove and the other of which is a pin portion movably inserted into the groove, and when the rotation adjustment member rotates in the first direction, the contact rib is adapted to the elastic when abutting a third position of one of the arms, the ratchet teeth do not mesh with the annular teeth, the tooth disk portion is rotatable in the first direction, and the rotary adjustment member rotates in the second direction; , each corresponding abutment rib abuts a fourth position on one of said resilient arms, said ratchet teeth meshing with said annular tooth, said tooth disk portion providing a clamping mechanism rotatable only in said second direction.

1 is a perspective view of one preferred embodiment of the present invention; FIG. 1 is an exploded view of one preferred embodiment of the present invention (encircled with a dashed line is a perspective view of a rotation adjustment member of one preferred embodiment of the present invention); FIG. FIG. 2 is another exploded view of one preferred embodiment of the present invention; FIG. 4 is another perspective view of one preferred embodiment of the present invention; FIG. 4 is a schematic view of rotating in a second direction in one preferred embodiment of the present invention; FIG. 4 is a schematic view of rotating in a first direction in one preferred embodiment of the present invention; 1 is a cross-sectional view of one preferred embodiment of the present invention; FIG. FIG. 4 is another cross-sectional view of one preferred embodiment of the present invention; 1 is a schematic view of a preferred embodiment of the present invention in use; FIG. 1 is a schematic view of a preferred embodiment of the present invention in use; FIG. FIG. 4 is a perspective view of another preferred embodiment of the present invention; FIG. 4 is a front view of another preferred embodiment of the present invention; FIG. 13 is a cross-sectional view taken along line AA of FIG. 12;

Hereinafter, the structural features and expected effects of the present invention will be explained through examples, but they are not intended to limit the scope of protection of the present invention.

1 to 10 show one preferred embodiment of the invention, the tightening mechanism 1 of the invention includes a belt protection mechanism 10, an actuator 20 and a rotation adjustment member 30. As shown in FIG.

The belt protection mechanism 10 includes a first belt portion 11 and at least one second belt portion 12 movable relative to the first belt portion 11, the first belt portion 11 having annular teeth 13. Each second belt portion 12 is provided with a rack 15 .

The actuator 20 is inserted through the through hole 14 and is provided with a central shaft portion 21 and two elastic arms 22 , the central shaft portion 21 being movable to the respective racks 15 of the second belt portion 12 . A meshing tooth disk portion 40 is provided axially projecting, and the resilient arms 22 each extend radially away from the central shaft portion 21, and the central shaft portion 21 has two first restraints. A portion 23 is provided and each of said resilient arms 22 is provided with a ratchet tooth 221 radially movable between a first position and a second position, and in this embodiment said resilient arms 22 are each A ratchet tooth 221 is provided to releasably mesh with the annular tooth 13, and the two first limiting portions 23 and the two elastic arms 22 are spaced apart from each other. The rotation adjustment member 30 is assembled to the actuator 20 and includes two second limiting portions 31 and two abutment ribs 32, each abutment rib 32 being movable between a third position and a fourth position. One of the first restricting portion 23 and the second restricting portion 31 is a groove, and the other is a pin portion that is movably inserted into the groove. When the rotation adjusting member 30 rotates in the first direction R1, the corresponding contact ribs 32 respectively contact the third position of one of the elastic arms 22, and the ratchet teeth 221 are positioned at the first position. , away from the central shaft portion 21, that is, the ratchet teeth 221 do not mesh with the ring tooth 13, allowing the tooth disc portion 40 to rotate in the first direction R1. When the rotation adjusting member 30 rotates in the second direction R2, the corresponding contact ribs 32 respectively contact the fourth position of one of the elastic arms 22, the ratchet teeth 221 are positioned at the second position, and the center Close to the shaft portion 21, ie the ratchet teeth 221 mesh with the ring teeth 13, the tooth disk portion 40 is rotatable only in the second direction R2. Thereby, the position of the second belt portion 12 with respect to the first belt portion 11 can be efficiently adjusted, and displacement of the second belt portion 12 with respect to the first belt portion 11 can be prevented after fixing.

The axial direction passes through the center of the actuator 20, the two elastic arms 22 are provided on two opposite sides in the axial direction, and the two abutment ribs 32 are provided on two opposite sides in the axial direction. , thereby obtaining the effect of stabilizing positioning and rotation.

Each of the first restricting portions 23 is the groove, each of the second restricting portions 31 is the pin portion, and each elastic arm 22 and the central shaft portion 21 constitute a storage groove 25. 25 does not communicate with the groove, the contact rib 32 is inserted into the receiving groove 25, and the groove is provided with two blocking walls 231, 232 on opposite sides, so that the pin portion and the Movement between the grooves does not affect the respective movements and positioning stability of the elastic arms 22 . When the abutment ribs 32 respectively abut on the third position of one of the elastic arms 22, the pin portion abuts the blocking wall 231 to rotate the tooth disk portion 40 in the second direction R2, and the abutment rib 32 respectively abut the fourth position of one of the elastic arms 22, the pin portion abuts the blocking wall 232 and rotates the tooth disc portion 40 in the first direction R1.

The elastic arm 22 is provided with an outer arm 222 and an inner arm 223, the connecting portion 224 of the inner arm 223 is connected to the outer arm 222, and the inner arm 223 is provided at the opposite end of the connecting portion 224. A free end 225 is provided, the outer arm 222 is provided with the ratchet teeth 221, the receiving groove 25 is provided between the inner arm 223 and the outer arm 222, and the abutment rib 32 is provided with the inner arm. 223, the inner arm 223 is provided with an abutment surface 226 facing the outer arm 222, the abutment surface 226 has a protrusion 227 projecting to the outer arm 222, and the abutment ribs 32 are respectively When contacting the third position of one of the elastic arms 22 , the contact ribs 32 respectively contact the protrusions 227 to disengage the ratchet teeth 221 from the annular tooth 13 , and the contact ribs 32 respectively contact the elastic Abutting on the fourth position of one of the arms 22 , the corresponding contact ribs 32 respectively abut on the corresponding contact surface 226 at a position other than the convex portion 227 , so that the ratchet teeth 221 are elastically aligned with the ring teeth 13 . The free end 225 exceeds by half the circumferential dimension of the outer arm 222 in the direction away from the connecting portion 224, thereby increasing the abuttable dimension of the abutment rib 32, Improve the buffer effect.

When viewed from the axial direction, the contact rib 32 is shaped like a shiitake mushroom extending in the radial direction. 322 is closer to the outer arm 222 than the tip portion 321, and in this way the contact with the inner arm 223 is performed smoothly.

The actuator 20 defines a circumferential direction relative to the axial direction, and the storage groove 25 has a circumferentially extending dimension greater than the circumferentially extending dimension of the groove, thereby requiring a rotary adjustment member 30. The actuator 20 is stably rotated while avoiding excessive rotation.

A hook portion 35 is provided on the pin portion, and the hook portion 35 is hooked on the actuator 20 . Specifically, the tightening mechanism 1 further includes a reset mechanism 50, the reset mechanism 50 includes a fixed connection member 51 and a biasing member 52, the fixed connection member 51 comprises the rotation adjustment member 30, the actuator 20 and a fixed member. The rotation adjustment member 30 moves relative to the fixed connection member 51, and the hook portion 35 drives the actuator 20 to separate from or approach the belt protection mechanism 10. and the biasing member 52 elastically contacts the fixed connecting member 51 and the rotation adjusting member 30 . Specifically, the rotation adjusting member 30 is provided with a shaft 33, the actuator 20 is provided with a shaft hole 24, the shaft 33 is inserted through the shaft hole 24, and the shaft 33 is provided with a storage groove 34. The biasing member 52 is provided in the receiving groove 34, and the biasing member 52 is elastically abutted between the groove bottom of the receiving groove 34 and the fixed connecting member 51, thus, The actuator 20 can be withdrawn from the ring tooth 13 or elastically reset to the ring tooth 13 . The fixed connection member 51 is an insertion rod having a large diameter portion 511 and a small diameter portion 512, the large diameter portion 511 is positioned in the storage groove 34 so as not to exceed the storage groove 34, and the biasing member 52 The small diameter portion 512 is inserted through the shaft rod 33 and the belt protection mechanism 10, and the locking member 3 is used to penetrate the small diameter portion 512. It is locked so that the biasing member 52 can stably provide the biasing force.

11-13 show another preferred embodiment of the present invention, wherein the at least one second belt portion 12 is two, and the two belt portions 12 are two, compared to one preferred embodiment of the present invention. The difference is that the second belt portions 12 extend in opposite directions, thereby adjusting the positions of the two second belt portions 12 with respect to the first belt portion 11 to maintain the position of the through hole 14. can do.

Reference Signs List 1 tightening mechanism 2 back frame 3 locking member 10 belt protection mechanism 11 first belt portion 12 second belt portion 13 annular tooth 14 through hole 15 rack 20 actuator 21 central shaft portion 22 elastic arm 221 ratchet tooth 222 outer arm 223 inner arm 224 Connecting portion 225 Free end portion 226 Contact surface 227 Protruding portion 23 First restricting portion 231, 232 Blocking wall 24 Shaft hole 25 Storage groove 30 Rotation adjusting member 31 Second restricting portion 32 Contact rib 321 Tip portion 322 Body portion 33 Shaft Rod 34 Storage groove 35 Hook portion 40 Tooth disk portion 50 Reset mechanism 51 Fixed connection member 511 Large diameter portion 512 Small diameter portion 52 Biasing member R1 First direction R2 Second direction

Claims (10)

A tightening mechanism,
A central shaft portion and two elastic arms are provided, and a tooth disk portion is provided on the central shaft portion so as to protrude in the axial direction, and the elastic arms extend radially away from the central shaft portion. the central shaft portion is provided with two first limiting portions, each of the resilient arms is provided with a ratchet tooth radially movable between a first position and a second position; an actuator in which the two first restricting parts and the two elastic arms are spaced apart from each other;
assembled to the actuator and comprising two second limiting portions and two abutment ribs, each abutting one of the elastic arms movably between a third position and a fourth position; one of the first restricting portion and the second restricting portion is a groove, and the other is a rotation adjusting member that is a pin portion that is movably inserted into the groove;
When the rotation adjustment member rotates in the first direction, the abutment ribs respectively abut against the third position of one of the elastic arms, and the ratchet teeth are located at the first position away from the central shaft. , when the rotation adjustment member rotates in the second direction, the abutment ribs respectively abut against the fourth position of one of the elastic arms, the ratchet teeth are located at the second position, and are aligned with the central shaft portion. Approaching, tightening mechanism. A tightening mechanism,
a first belt portion and at least one second belt portion movable with respect to the first belt portion, the first belt portion being provided with a through hole including an annular tooth; and the second belt portion a belt protection mechanism provided with a rack in each of the
A central shaft portion and two elastic arms are provided through the through hole, and the central shaft portion has a tooth disk portion that movably meshes with each rack of the second belt portion, protruding in the axial direction. each of said elastic arms extending radially away from said central shaft portion, said central shaft portion being provided with two first limiting portions, each of said elastic arms being provided with said annular tooth. a ratchet tooth is provided in releasable engagement with the ratchet tooth, said ratchet tooth being radially movable between a first position and a second position, said two first restraints and said two resilient arms being spaced from each other an actuator spaced apart from
assembled to the actuator and comprising two second limiting portions and two abutment ribs, each abutting one of the elastic arms movably between a third position and a fourth position; one of the first restricting portion and the second restricting portion is a groove, and the other is a rotation adjusting member that is a pin portion that is movably inserted into the groove;
When the rotation adjusting member rotates in the first direction, the abutment rib abuts against the third position of one of the resilient arms, the ratchet teeth do not mesh with the annular teeth, and the tooth disc portion is engaged with the third position. rotatable in one direction, each said abutment rib abutting a fourth position of one of said resilient arms when said rotary adjustment member rotates in a second direction, said ratchet teeth meshing with said annular teeth; A tightening mechanism, wherein the tooth disc portion is rotatable only in the second direction. Each of the first restricting portions is the groove, each of the second restricting portions is the pin portion, each of the elastic arms and the central shaft portion constitutes a storage groove, and the storage groove communicates with the groove. , the abutment rib is inserted into the receiving groove, the groove is provided with two blocking walls on opposite sides, and the abutment ribs respectively abut on the third position of one of the elastic arms. said pin portion abuts on one of said blocking walls, and said pin portion abuts on said other blocking wall when said contact ribs respectively abut on the fourth position of one of said elastic arms. 3. The tightening mechanism according to 1 or 2. The elastic arm is provided with an outer arm and an inner arm, the connecting portion of the inner arm is connected to the outer arm, the inner arm is provided with a free end provided at the opposite end of the connecting portion, The ratchet teeth are provided on the outer arm, the accommodation groove is provided between the inner arm and the outer arm, the contact rib contacts the inner arm, and the inner arm contacts the outer arm. A surface is provided, the abutment surface has a convex portion projecting to the outer arm, and the abutment ribs each abut against the third position of one of the elastic arms when the abutment ribs are respectively in contact with the convex portions. and the contact ribs contact the fourth position of one of the elastic arms, the contact ribs contact positions other than the convex portion of the contact surface. Tightening mechanism as described. When viewed from the axial direction, the contact rib has a shiitake shape extending in the radial direction, and the contact rib is provided with a tip portion and a body portion that contact the inner arm, and the body portion is the tip end portion. 5. The tightening mechanism of claim 4, closer to said outer arm than to a portion. 5. The tightening mechanism of claim 4, wherein the actuator defines a circumferential direction relative to the axial direction, the circumferentially extending dimension of the receiving groove being greater than the circumferentially extending dimension of the groove. The first restricting portions are the grooves, the second restricting portions are the pin portions, the pin portions are provided with hook portions, and the hook portions are hooked on the actuator. 2. The tightening mechanism according to claim 1. The first restricting portions are the grooves, the second restricting portions are the pin portions, the contact ribs are provided with hook portions, and the hook portions are hooked on the actuator in the axial direction,
Further comprising a reset mechanism, said reset mechanism comprising a fixed connection member and a biasing member, said fixed connection member being inserted through said rotary adjustment member, said actuator and a fixing back frame, said rotary adjustment member being connected to said fixed connection. Moving relative to a member, the hook portion selectively drives the actuator to move away from or closer to the belt protection mechanism, the biasing member connecting the fixed connecting member and the rotary adjustment member. 3. The tightening mechanism of claim 2, wherein the clamping mechanism resiliently abuts the . The rotation adjustment member is provided with a shaft, the actuator is provided with a shaft hole, the shaft is inserted through the shaft hole, the shaft is provided with a storage groove, and the biasing member is in the storage groove. 9. The tightening mechanism of claim 8, wherein the biasing member is provided to elastically abut between the groove bottom of the storage groove and the fixed connecting member. Each of the first restricting portions is the groove, each of the second restricting portions is the pin portion, each of the elastic arms and the central shaft portion constitutes a storage groove, and the storage groove communicates with the groove. , the abutment rib is inserted into the receiving groove, the groove is provided with two blocking walls on opposite sides, and the abutment ribs respectively abut on the third position of one of the elastic arms. the pin portion contacts one of the blocking walls, and the contact ribs contact the fourth position of one of the elastic arms, respectively, the pin portion contacts the other blocking wall;
The elastic arm is provided with an outer arm and an inner arm, the connecting portion of the inner arm is connected to the outer arm, the inner arm is provided with a free end provided at the opposite end of the connecting portion, The ratchet teeth are provided on the outer arm, the accommodation groove is provided between the inner arm and the outer arm, the contact rib contacts the inner arm, and the inner arm contacts the outer arm. A surface is provided, the abutment surface has a convex portion projecting to the outer arm, and the abutment ribs each abut against the third position of one of the elastic arms when the abutment ribs are respectively in contact with the convex portions. and the contact ribs contact the fourth position of one of the elastic arms, the contact ribs contact positions other than the convex portion of the contact surface,
the free end extends in a direction away from the connecting portion by one-half the circumferential dimension of the outer arm;
the actuator defines a circumferential direction relative to the axial direction, the circumferentially extending dimension of the storage groove being greater than the circumferentially extending dimension of the groove;
The first restricting portions are the grooves, the second restricting portions are the pin portions, the pin portions are provided with hook portions, and the hook portions are hooked on the actuator,
the axial direction passes through the center of the actuator, the two elastic arms are provided on two opposite sides in the axial direction, the two contact ribs are provided on two opposite sides in the axial direction,
The fixed connection member is an insertion rod having a large-diameter portion and a small-diameter portion, the large-diameter portion is positioned in the storage groove so as not to exceed the storage groove, and the biasing member is the groove bottom of the storage groove and the elastically contacting the large-diameter portion, the small-diameter portion being inserted through the axial rod and the belt protection mechanism, and being locked by penetrating the small-diameter portion with a locking member;
10. The tightening mechanism of claim 9, wherein said at least one second belt portion is two, said two second belt portions each extending in opposite directions.

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