Locking mechanism and horizontal bar

Abstract

A locking mechanism and a single bar, the locking mechanism is used for limiting the rotation of the main pipe of the single bar body relative to the telescopic pipe, comprising a fixed seat, a gear ring, a locking piece and a spring, the fixed seat is fixedly arranged at the end of the main pipe, the gear ring is sleeved on the telescopic pipe and located in the fixed seat, the outer peripheral surface of the telescopic pipe is formed with a rotation stopping groove extending along the axial direction thereof, the gear ring is provided with a rotation stopping portion located in the rotation stopping groove, the locking piece is movably arranged on the fixed seat along the radial direction of the gear ring between a locking position and a release position, the spring is used for driving the locking piece to move to the locking position, the outer peripheral surface of the gear ring is formed with a plurality of circumferentially distributed ratchets, the locking piece comprises a positioning portion capable of engaging with the ratchets, when the locking piece is located at the locking position, the positioning portion is adapted to engage with the ratchets to limit the main pipe to rotate relative to the telescopic pipe in one direction only, when the locking piece is located at the release position, the positioning portion is disengaged from the gear ring so that the main pipe can rotate relative to the telescopic pipe in both directions.

Description

Technical Field

[0001] This utility model relates to a locking mechanism and a single bar. Background Technology

[0002] As is commonly known, a door bar mainly consists of a retractable bar body and support seats at both ends of the bar body. The bar body includes a main pipe and two telescopic tubes retractably sleeved at both ends of the main pipe. A screw extending axially is installed in the main pipe, and nuts threaded into the screws are installed in the telescopic tubes. When the main pipe rotates relative to the telescopic tubes, the screws and nuts can drive the telescopic tubes to extend or retract. The extension of the telescopic tubes causes the bar body to lengthen, ultimately causing the support seats at both ends of the bar body to press firmly against the wall or door frame, thus completing the installation of the bar. After installation, to prevent the bar from loosening and falling off due to the rotation of the main pipe relative to the telescopic tubes, a locking mechanism is usually installed to restrict the rotation of the main pipe relative to the telescopic tubes. For example, Chinese patent document CN220530575U discloses an improved type. A single bar for preventing loosening of interior doors includes a single bar body and at least one retractable support device. The retractable support device includes a telescopic tube and a support component. One end of the telescopic tube passes through the single bar body and is retractably connected to it via a thread, while the other end is connected to the support component. It also includes a locking device, which includes a locking block protruding from the outer peripheral wall of the end of the single bar body and a locking sleeve that can slide axially on the telescopic tube. The outer peripheral wall of the telescopic tube has an axially recessed track groove, and the inner peripheral wall of the locking sleeve has a protruding limiting block that engages with the track groove. The inner peripheral wall of the locking sleeve also has a recessed slot for engaging with the locking block insert. Multiple slots are spaced circumferentially to ensure that even when the locking sleeve is in different circumferential positions due to the twisting operation of the telescopic tube, one corresponding slot can still engage with the locking block insert. In this design, the locking sleeve is movably fitted onto the telescopic tube. During use, the locking sleeve may loosen, causing the locking block to disengage from the slot, posing a safety hazard. Summary of the Invention

[0003] The purpose of this invention is to provide a locking mechanism that is simple in structure and safe and reliable.

[0004] The objective of this utility model is achieved through the following technical solution: A locking mechanism for restricting the rotation of the main body of a horizontal bar relative to a telescopic tube is characterized by comprising a fixed seat, a gear ring, a locking member, and a spring. The fixed seat is fixedly disposed at the end of the main body. The gear ring is sleeved on the telescopic tube and located in the fixed seat. An anti-rotation groove extending axially along the outer circumferential surface of the telescopic tube is formed. The gear ring is provided with an anti-rotation portion located in the anti-rotation groove. The locking member is movably disposed on the fixed seat along the radial direction of the gear ring between a locked position and a released position. The spring is used to drive the locking member to move to the locked position. A plurality of circumferentially distributed ratchet teeth are formed on the outer circumferential surface of the gear ring. The locking member includes a positioning portion that can engage with the ratchet teeth. When the locking member is in the locked position, the positioning portion is adapted to engage with the ratchet teeth to restrict the main body to rotate only unidirectionally relative to the telescopic tube. When the locking member is in the released position, the positioning portion disengages from the gear ring, allowing the main body to rotate bidirectionally relative to the telescopic tube.

[0005] In the above solution, the spring keeps the positioning part engaged with the ratchet, meaning the positioning part can fit into the groove between two adjacent ratchet teeth. When the main tube rotates forward relative to the telescopic tube, the positioning part switches between different grooves under the guidance of the inclined surface of the ratchet, ensuring that the telescopic tube can only extend relative to the main tube, thus facilitating the installation of the bar. When the main tube rotates in the opposite direction relative to the telescopic tube, the positioning part is blocked by the other side of the ratchet and cannot cross the groove, thus restricting the reverse rotation of the main tube relative to the telescopic tube and preventing the telescopic tube from retracting into the main tube, effectively preventing the bar from falling off. When it is necessary to remove the bar, the locking device is operated to move it to the release position, and the main tube can be rotated in the opposite direction to retract the telescopic tube into the main tube, thereby removing the bar. The above solution is simple in structure and safe and reliable.

[0006] The fixing base includes a first sleeve and a second sleeve. The first sleeve is fixedly sleeved on the end of the main tube, and the second sleeve is fixedly sleeved on the first sleeve. The first sleeve is provided with a first limiting step, and the second sleeve is provided with a second limiting step. The gear ring is restricted between the first limiting step and the second limiting step. This structure facilitates the assembly of the product.

[0007] The fixing base also includes a mounting block. The outer circumferential surface of the second sleeve forms a radially extending mounting tube. The locking member is movably sleeved in the mounting tube. The mounting block is fixedly mounted on the second sleeve and sleeved on the mounting tube. The locking member includes a rod body, a limiting part, and a positioning part. The limiting part is located at the lower end of the rod body, and the positioning part is located at the lower end of the limiting part. The spring is sleeved on the rod body and compressed between the limiting part and the mounting block. The mounting block has a clearance hole for the rod body to pass through. This structure facilitates product assembly.

[0008] The mounting tube has a guide groove extending along its axial direction, and the limiting part has a guide part embedded in the guide groove. The guide groove and the guide part cooperate to guide the locking part so that it cannot rotate but can only move up and down, thereby enabling the positioning part to reliably cooperate with the ratchet.

[0009] The locking component also includes an operating knob, which is rotatably mounted on the upper end of the rod. The top of the mounting block has a raised lifting portion. The operating knob has a first positioning groove and a second positioning groove that can cooperate with the lifting portion. The depth of the first positioning groove is greater than the depth of the second positioning groove. When the lifting portion is located in the first positioning groove, the locking component is in the locked position, causing the positioning portion to engage with the ratchet. When the lifting portion is located in the second positioning groove, the locking component is in the released position, causing the positioning portion to disengage from the gear ring. During operation, pulling the operating knob upward and rotating it at a certain angle allows the lifting portion to switch between the first and second positioning grooves, making operation convenient.

[0010] The end of the main tube has a positioning notch, and the inner wall of the first sleeve is provided with a positioning protrusion that cooperates with the positioning notch. This structure facilitates the positioning and installation of the first sleeve and prevents the first sleeve from rotating relative to the main tube.

[0011] The main pipe is fixedly provided with a screw extending along its axial direction, and the telescopic tube is fixedly provided with a nut. The screw includes a threaded section that can be threadedly engaged with the nut. When the main pipe rotates relative to the telescopic tube, the threaded section engages with the nut to drive the telescopic tube to extend or retract.

[0012] The screw also includes a smooth section without threads. This smooth section is connected to the threaded section and located on the inside, allowing the telescopic tube to quickly extend until the nut engages with the threaded section. Compared to existing screws with threads throughout, this allows the telescopic tube to quickly extend and then be slowly and stably adjusted by the threaded nut when installing the horizontal bar, thus facilitating the rapid installation of the horizontal bar.

[0013] A single bar, characterized in that it includes the aforementioned locking mechanism.

[0014] It also includes the main pipe and two telescopic tubes, which are telescopically sleeved at both ends of the main pipe. Support seats are provided at the outer ends of the two telescopic tubes, and a level is provided on the support seats. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings.

[0016] Figure 1 This is a three-dimensional view of the single bar of this utility model.

[0017] Figure 2 This is a front view of the main body of the horizontal bar.

[0018] Figure 3 for Figure 2 Sectional view along direction AA.

[0019] Figure 4 This is an exploded view of the components of the locking mechanism.

[0020] Figure 5 An exploded view of the components from another perspective of the locking mechanism.

[0021] Figure 6 This is a 3D view of the operating knob.

[0022] Figure 7 A 3D view of the locking mechanism.

[0023] Figure 8 This is an exploded view of the locking mechanism.

[0024] Figure 9 This is a cross-sectional view of the locking mechanism.

[0025] Figure 10 This is an exploded view of the single bar itself. Detailed Implementation

[0026] Reference Figures 1 to 10 As shown, a horizontal bar includes a horizontal bar body 1 and support seats 2 disposed at both ends of the horizontal bar body 1. The horizontal bar body 1 includes a main tube 11 and two telescopic tubes 12, which are telescopically sleeved in the main tube 11. A buffer sleeve 14 is sleeved on the outside of the main tube 11. A screw 13 extending axially is fixedly disposed in the main tube 11. The screw 13 includes a smooth section 131 in the middle and threaded sections 132 at both ends. Nuts 121 are disposed on the inner ends of the telescopic tubes 12 and sleeved on the screw 13. 121 can be threaded with threaded section 132, so that when installing the horizontal bar, the telescopic tube 12 can be quickly pulled out and the nut 121 can be threadedly connected with the threaded section 132. Then, the main tube 11 can be rotated relative to the telescopic tube 12. With the cooperation of the nut 121 and the threaded section 132, the telescopic tube 12 can be slowly and steadily extended until the support seats 2 at both ends of the horizontal bar body 1 are pressed against the wall, thus completing the installation of the horizontal bar. In order to facilitate the horizontal adjustment of the horizontal bar, a level is set on the support seat 2.

[0027] To prevent the main pipe 11 from rotating in the opposite direction relative to the telescopic tube 12, causing the single bar to loosen and fall off, this utility model also provides a locking mechanism 3. The locking mechanism 3 includes a fixed seat B, a gear ring 32, a locking element 33, and a spring 34. The fixed seat B is fixedly installed at the end of the main pipe 11. The gear ring 32 is sleeved on the telescopic tube 12 and located in the fixed seat B. The outer circumferential surface of the telescopic tube 12 has an anti-rotation groove 121 extending axially. The gear ring 32 is provided with an anti-rotation part 321 located in the anti-rotation groove 121. The locking element 33 can be positioned radially along the gear ring 32 in the locked position and... The locking member 33 is movably mounted on the fixed base B between the release positions. The spring 34 is used to drive the locking member 33 to move to the locking position. The outer circumferential surface of the toothed ring 32 has a plurality of circumferentially distributed ratchet teeth 322. The locking member 33 includes a positioning part 331 that can engage with the ratchet teeth 322. When the locking member 33 is in the locking position, the positioning part 331 is adapted to engage with the ratchet teeth 322 to restrict the main pipe 11 to rotate only in one direction relative to the telescopic tube 12. When the locking member 33 is in the release position, the positioning part 331 disengages from the toothed ring 32, allowing the main pipe 11 to rotate bidirectionally relative to the telescopic tube 12.

[0028] The mounting base B includes a first sleeve 37, a second sleeve 31, and a mounting block 35. The first sleeve 37 is fixedly sleeved on the end of the main pipe 11. Specifically, the end of the main pipe 11 has a positioning notch 111. The inner wall of the first sleeve 37 is provided with a positioning protrusion 371 that mates with the positioning notch 111. During installation, the positioning protrusion 371 is aligned with the positioning notch 111, and then the first sleeve 37 is sleeved on the end of the main pipe 11 and locked in place by bolts or other fasteners. The mate between the positioning notch 111 and the positioning protrusion 371 can effectively prevent the first sleeve 37 from rotating relative to the main pipe 11, ensuring the stability of the installation. The second sleeve 31 is fixedly sleeved on the first sleeve 37 and locked in place by fasteners. The first sleeve 37 is provided with a first limiting step 372, and the second sleeve 31 is provided with a second limiting step 315. The gear ring 32 is restricted between the first limiting step 372 and the second limiting step 315. This structure facilitates product assembly.

[0029] The outer circumferential surface of the second sleeve 31 forms a radially extending mounting tube 311. A locking member 33 is movably fitted within the mounting tube 311. A mounting block 35 is fixedly mounted on the second sleeve 31 by bolts and fitted onto the mounting tube 311. The locking member 33 includes a rod 333, a limiting part 332, a positioning part 331, and an operating knob 36. The limiting part 332 is located at the lower end of the rod 333, and the positioning part 331 is located at the lower end of the limiting part 332. A spring 34 is fitted onto the rod 333 and compressed between the limiting part 332 and the mounting block 35. A clearance hole 352 is formed on the mounting block 35 for the upper end of the rod 333 to pass through. The operating knob 36 is rotatably located at the upper end of the rod 333. The top of the knob 35 is provided with a raised lifting part 351. The operating knob 36 is provided with a first positioning groove 361 and a second positioning groove 362 that can cooperate with the lifting part 351. The depth of the first positioning groove 361 is greater than the depth of the second positioning groove 362. When the lifting part 351 is located in the first positioning groove 361, the locking member 33 is in the locked position, so that the positioning part 331 engages with the ratchet 322. When the lifting part 351 is located in the second positioning groove 362, the locking member 33 is in the released position, so that the positioning part 3331 disengages from the gear ring 32. During operation, the operating knob 36 is pulled up and rotated at a certain angle to switch the lifting part 351 between the first positioning groove 361 and the second positioning groove 362, which is convenient to operate.

[0030] The mounting tube 311 has a guide groove 312 extending along its axial direction, and the limiting part 332 has a guide part 334 embedded in the guide groove. The guide groove 312 and the guide part 334 cooperate to guide the locking member 33 to move up and down without rotating, so that the positioning part 331 can reliably cooperate with the ratchet 322.

[0031] In the above scheme, the spring 34 can keep the positioning part 331 engaged with the ratchet 322, that is, the positioning part 331 can be adapted to be embedded in the groove between two adjacent ratchet teeth 322. When the main pipe 11 rotates forward relative to the telescopic tube 12, the positioning part 331 switches between different grooves under the guidance of the inclined surface of the ratchet 322, so that the telescopic tube 12 can only extend relative to the main pipe 11, so that the bar body 1 extends to be pressed tightly between the two walls, thereby facilitating the installation of the bar. When the main pipe 11 rotates in the opposite direction relative to the telescopic tube 12, the positioning part 331 is... The other side of the ratchet 322 prevents it from crossing the tooth groove, thus limiting the reverse rotation of the main tube 11 relative to the telescopic tube 12 and preventing the telescopic tube 12 from retracting into the main tube 11, effectively preventing the bar from falling off. When the bar needs to be removed, the operating knob 36 is pulled up and rotated at a certain angle, so that the lifting part 351 is located in the second positioning groove 362, and the positioning part 331 of the locking part 33 is disengaged from the toothed ring 32. The main tube 11 can then be rotated in the reverse direction to retract the telescopic tube 12 into the main tube 11, thereby removing the bar. The above solution is simple in structure and safe and reliable.

[0032] The above description is merely a preferred embodiment of the present utility model, and therefore cannot be construed as limiting the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the specification of the present utility model shall still fall within the scope of the patent of the present utility model.

Claims

1. A locking mechanism for restricting the rotation of the main tube of a horizontal bar relative to a telescopic tube, characterized in that: The device includes a fixed base, a toothed ring, a locking element, and a spring. The fixed base is fixedly mounted on the end of the main pipe. The toothed ring is sleeved on the telescopic tube and located in the fixed base. The outer circumferential surface of the telescopic tube has an anti-rotation groove extending along its axial direction. The toothed ring has an anti-rotation part located in the anti-rotation groove. The locking element is movably mounted on the fixed base along the radial direction of the toothed ring between a locked position and a released position. The spring is used to drive the locking element to move to the locked position. The outer circumferential surface of the toothed ring has a plurality of circumferentially distributed ratchet teeth. The locking element includes a positioning part that can engage with the ratchet teeth. When the locking element is in the locked position, the positioning part is adapted to engage with the ratchet teeth to restrict the main pipe to rotate only in one direction relative to the telescopic tube. When the locking element is in the released position, the positioning part disengages from the toothed ring, allowing the main pipe to rotate bidirectionally relative to the telescopic tube.

2. The locking mechanism according to claim 1, characterized in that: The fixing seat includes a first sleeve and a second sleeve. The first sleeve is fixedly sleeved on the end of the main tube, and the second sleeve is fixedly sleeved on the first sleeve. The first sleeve is provided with a first limiting step, and the second sleeve is provided with a second limiting step. The gear ring is restricted between the first limiting step and the second limiting step.

3. A locking mechanism according to claim 2, characterized in that: The fixing base also includes a mounting block. The outer peripheral surface of the second sleeve forms a radially extending mounting tube. The locking member is movably sleeved in the mounting tube. The mounting block is fixedly mounted on the second sleeve and sleeved on the mounting tube. The locking member includes a rod body, a limiting part, and a positioning part. The limiting part is located at the lower end of the rod body, and the positioning part is located at the lower end of the limiting part. The spring is sleeved on the rod body and compressed between the limiting part and the mounting block. The mounting block has a clearance hole for the rod body to pass through.

4. A locking mechanism according to claim 3, characterized in that: The mounting tube has a guide groove extending along its axial direction, and the limiting part has a guide part embedded in the guide groove.

5. A locking mechanism according to claim 3, characterized in that: The locking component also includes an operating knob, which is rotatably mounted on the upper end of the rod. The top of the mounting block is provided with a raised lifting part. The operating knob is provided with a first positioning groove and a second positioning groove that can cooperate with the lifting part. The depth of the first positioning groove is greater than the depth of the second positioning groove. When the lifting part is located in the first positioning groove, the positioning part engages with the ratchet; when the lifting part is located in the second positioning groove, the positioning part disengages from the gear ring.

6. A locking mechanism according to claim 2, characterized in that: The end of the main tube has a positioning notch, and the inner wall of the first sleeve is provided with a positioning protrusion that mates with the positioning notch.

7. A locking mechanism according to any one of claims 1 to 5, characterized in that: The main tube is fixedly provided with a screw extending along its axial direction, and the telescopic tube is fixedly provided with a nut. The screw includes a threaded section that can be threadedly engaged with the nut.

8. A locking mechanism according to claim 7, characterized in that: The screw also includes a smooth section without threads, which is connected to the threaded section and located on the inside, allowing the telescopic tube to quickly extend to engage with the nut and the threaded section.

9. A horizontal bar, characterized in that: Includes the locking mechanism as described in any one of claims 1 to 8.

10. A horizontal bar according to claim 9, characterized in that: It includes the main pipe and two telescopic tubes, which are telescopically sleeved at both ends of the main pipe. Support seats are provided at the outer ends of the two telescopic tubes, and a level is provided on the support seats.

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