A telescopic mast

Abstract

The application relates to a telescopic heaven-and-earth rod, belonging to the technical field of security doors, which comprises an inner rod and an outer rod, the end of the outer rod is provided with a containing groove in the axial direction, one end of the inner rod is inserted into the containing groove, and the other end of the inner rod extends out of the containing groove; the outer rod is coaxially and fixedly provided with a clamping ring at one end of the slot opening facing the containing groove, a plurality of interval grooves for inward contraction of the clamping ring are formed in the circumferential direction of the clamping ring, a locking sleeve is sleeved on the inner rod, a sleeve groove is formed at one end of the locking sleeve close to the outer rod, the sleeve groove can extrude the outer wall of the clamping ring and force the clamping ring to contract inward to press the inner rod, an internal thread is arranged in the sleeve groove, an external thread is arranged on the outer wall of the clamping ring, and the internal thread and the external thread are matched. The application has the effect that the overall length of the heaven-and-earth rod can be conveniently adjusted to adapt to the distance between the heaven-and-earth hook on the lock body and the positioning hole on the door frame.

Description

Technical Field

[0001] This application relates to the field of security door technology, and in particular to a retractable top and bottom bar. Background Technology

[0002] Door locks are the core components of modern access control systems, enabling door locking. To further enhance the security of door locks, most security doors on the market currently incorporate deadbolts at the top and bottom of the lock body. These deadbolts connect to hook slots on the deadbolt rods, establishing a connection between them. When a user locks the door, the deadbolts push the deadbolt rods, inserting their ends into the corresponding limiting holes in the door frame. This engagement enhances the overall locking stability of the security door. Conversely, when a user unlocks the door, the deadbolts pull the deadbolt rods out of the limiting holes in the door frame, allowing the door to open normally.

[0003] In the process of developing this application, it was found that the technology has at least the following problems: Most of the top and bottom rods in existing door locks are long rods of fixed length. Due to the differences in structural dimensions of different brands and models of security doors or lock products, the distance from the top and bottom hooks on the lock body to the positioning holes on the door frame is different, which makes it impossible to meet the adaptation requirements of different specifications of security doors. If the top and bottom rods are too long, they will interfere with the door frame; if the top and bottom rods are too short, they cannot be effectively inserted into the limiting holes of the door frame, thus losing the anti-theft enhancement function. Utility Model Content

[0004] In order to facilitate the adjustment of the overall length of the top and bottom rods to match the distance between the top and bottom hooks on the lock body and the positioning holes on the door frame, this application provides a telescopic top and bottom rod.

[0005] The retractable top and bottom pole provided in this application adopts the following technical solution: A retractable top and bottom rod includes an inner rod and an outer rod. The outer rod has a receiving groove along its axial direction at its end. One end of the inner rod is inserted into the receiving groove, and the other end of the inner rod extends out of the receiving groove. A clamping ring is coaxially and fixedly installed on the outer rod at the end facing the opening of the receiving groove. The clamping ring has several spaced grooves in its circumferential direction for inward retraction. A locking sleeve is fitted on the inner rod. The locking sleeve has a sleeve groove at its end near the outer rod. The sleeve groove can compress the outer wall of the clamping ring and force the clamping ring to retract inward and press the inner rod. An internal thread is provided in the sleeve groove, and an external thread is provided on the outer wall of the clamping ring. The internal thread and the external thread are adapted to each other.

[0006] By adopting the above technical solution, the inner rod is slid along the axial direction of the outer rod, allowing the inner rod to extend further or retract into the receiving groove, thereby achieving adjustment of the overall length of the top and bottom rods. After the overall length of the top and bottom rods reaches the required level, the locking sleeve is moved so that the sleeve groove fits into the clamping ring. Then, the locking sleeve is rotated, and the locking sleeve rotates and squeezes the clamping ring. The width of the spacer groove on the clamping ring decreases to accommodate the contraction of the clamping ring, so that the clamping ring contracts and clamps and locks the inner rod, achieving stepless adjustment and reliable fixation of the length of the top and bottom rods, thereby adapting to the installation requirements of different security door or lock structure dimensions.

[0007] Preferably, a pressure groove is provided on the side wall of the receiving groove, and a pre-pressure block is slidably disposed in the pressure groove. The sliding direction of the pre-pressure block is parallel to the radial direction of the outer rod. The pre-pressure block can abut against the inner rod. The outer rod is also provided with a pre-pressure component that drives the pre-pressure block to slide.

[0008] By adopting the above technical solution, the pre-compression block can slide radially and press the inner rod under the drive of the pre-compression component. It can provide a certain pre-tightening friction force when the locking sleeve is not locked, preventing the inner rod from sliding on its own under the action of gravity or slight external force, realizing the rapid fixing and loosening of the inner rod, so as to meet the needs of frequent adjustment of the length of the top and bottom rods, and facilitate the initial positioning of the length of the top and bottom rods. After the length of the top and bottom rods is determined and adjusted, the inner rod can be further reliably fixed by the locking sleeve and the clamping ring.

[0009] Preferably, the pre-compression component includes a sliding button, and a groove communicating with the pressure groove is provided on the outer wall of the outer rod. The sliding button is slidably disposed in the groove. The side of the sliding button facing the inner rod is set as an inclined surface. The inclined surface abuts against the end of the pre-compression block away from the inner rod. The inclined surface gradually approaches the inner rod in the sliding direction of the sliding button.

[0010] By adopting the above technical solution, the sliding button is pushed to slide in the slide groove, and the inclined surface contacts the pre-pressing block. Since the inclined surface gradually approaches the inner rod in the sliding direction of the sliding button, the sliding motion of the sliding button is converted into the radial motion of the pre-pressing block, so that the pre-pressing block is pressed against the inner rod. The pre-pressing block is difficult to react to the sliding button, and the sliding button has a certain locking effect on the pre-pressing block.

[0011] Preferably, guide grooves are provided on both sides of the slide groove, and guide blocks are integrally formed on both sides of the slide button. The guide blocks correspond one-to-one with the guide grooves, and the guide blocks extend into the guide grooves and slide in cooperation with the guide grooves.

[0012] By adopting the above technical solution, the sliding cooperation between the guide block and the guide groove guides the movement path of the slider, preventing the slider from deflecting or getting stuck during the pushing and pulling process, and ensuring the stability of the slider's sliding process.

[0013] Preferably, the guide block has a movable groove, and a movable block is provided in the movable groove. A ball is embedded in the movable block on the side away from the end wall of the movable groove. The ball abuts against the side wall of the guide groove and rolls on the side wall of the guide groove.

[0014] By adopting the above technical solution, the ball bearings transform the sliding friction between the guide block and the sidewall of the guide groove into rolling friction, thereby reducing sliding resistance.

[0015] Preferably, the movable block slides in the movable groove along the direction of retraction or extension of the movable groove. A thrust spring is provided between the end wall of the movable groove and the movable block. The thrust spring drives the movable block away from the end wall of the movable groove. A stopping groove adapted to the ball is opened in the guide groove. The ball can fall into the stopping groove.

[0016] By adopting the above technical solution, the thrust spring provides continuous thrust to the moving block. When the ball moves to the position of the stop groove, it falls into the stop groove under the action of the spring force, producing a clear stop sensation, thereby providing the operator with tactile position feedback, indicating that the pre-pressing block has reached the position of effectively pressing the inner rod. Furthermore, when the thrust spring drives the ball into the stop groove, it increases the force required for the ball to leave the stop groove, preventing the slider from sliding accidentally.

[0017] Preferably, the slider has a friction texture on the side away from the inner rod.

[0018] By adopting the above technical solution, the friction texture increases the roughness of the contact surface between the finger and the slider, thereby enhancing the friction and making it less likely to slip when pushing or pulling the slider.

[0019] Preferably, a limiting block is fixedly provided on the outer wall of the outer rod, and the locking sleeve can abut against the limiting block.

[0020] By adopting the above technical solution, the limiting block provides a limit for the screwing in of the locking sleeve, preventing the locking sleeve from being over-tightened and thus damaging the threads.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting an inner rod, outer rod, receiving groove, clamping ring, spacer groove, locking sleeve, and sleeve groove, the inner rod can be extended further or retracted into the receiving groove, thereby adjusting the overall length of the top and bottom rods. The locking sleeve is screwed on to squeeze the clamping ring, so that the clamping ring retracts and hugs and locks the inner rod, thus reliably fixing the length of the top and bottom rods, thereby adapting to the installation requirements of different security doors or lock structures. 2. By setting pressure grooves, pre-pressure blocks, pre-pressure components, sliding buttons, sliding grooves, and inclined surfaces, when the locking sleeve is not locked, the sliding button drives the inclined surface to push the pre-pressure block to radially press the inner rod, providing pre-tightening friction for the inner rod, preventing the inner rod from sliding on its own due to gravity or slight external force, making it easier for operators to frequently adjust the length of the top and bottom rods and perform preliminary positioning, thus improving installation and debugging efficiency; 3. By setting guide grooves, guide blocks, movable grooves, movable blocks, balls, thrust springs, and stop grooves, the thrust springs push the balls into the stop grooves, which can provide tactile feedback to the operator that the pre-pressed block is in place, and prevent the slider from sliding accidentally, thus further improving the stability of operation. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of a retractable top and bottom rod provided in an embodiment of this application.

[0023] Figure 2 yes Figure 1 Enlarged view of section A.

[0024] Figure 3 yes Figure 1 Enlarged view of section B.

[0025] Figure 4 This is a schematic diagram of the locking sleeve in an embodiment of this application.

[0026] Figure 5 This is a partial cross-sectional structural diagram of a retractable top and bottom rod provided in an embodiment of this application.

[0027] Figure 6 This is a cross-sectional structural diagram of the slider in the embodiment of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Outer rod; 11. Receiving groove; 12. Clamping ring; 121. Spacing groove; 13. Pressing groove; 131. Pre-compression block; 14. Sliding groove; 141. Guide groove; 1411. Stopping groove; 15. Sliding button; 151. Inclined surface; 152. Guide block; 1521. Movable groove; 1522. Movable block; 1523. Ball bearing; 1524. Thrust spring; 153. Friction texture; 16. Limiting block; 2. Inner rod; 21. Hook groove; 3. Locking sleeve; 31. Sleeve groove. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0030] This application discloses a retractable vertical pole. (See also...) Figure 1 and Figure 2It includes an inner rod 2 and an outer rod 1. The end of the outer rod 1 is provided with a receiving groove 11 along the axial direction. One end of the inner rod 2 is inserted into the receiving groove 11, and the other end of the inner rod 2 extends out of the receiving groove 11 and is provided with a hook groove 21, which is used to connect the deadbolt on the lock body.

[0031] Reference Figure 2 and Figure 4 The outer rod 1 has a clamping ring 12 integrally formed on the same axis at one end facing the groove of the receiving groove 11. The clamping ring 12 is elastic, and the inner rod 2 passes through the clamping ring 12. The clamping ring 12 has several spacer grooves 121 on its circumference for inward contraction, and the spacer grooves 121 penetrate the inner and outer walls of the clamping ring 12; in this embodiment, two spacer grooves 121 are provided. A locking sleeve 3 is fitted onto the inner rod 2. The locking sleeve 3 has a groove 31 at one end near the outer rod 1. The inner wall of the groove 31 can compress the outer wall of the clamping ring 12, forcing the clamping ring 12 to contract inward and press the inner rod 2. Specifically, the outer diameter of the clamping ring 12 gradually decreases in the direction away from the outer rod 1, and the inner diameter of the groove 31 gradually decreases in the direction away from the outer rod 1. The groove 31 has an internal thread, and the outer wall of the clamping ring 12 has an external thread, with the internal thread and external thread being compatible. A limit block 16 is fixedly installed on the outer wall of the outer rod 1, and the locking sleeve 3 can abut against the limit block 16.

[0032] Reference Figures 1 to 4 The inner rod 2 is slid along the axis of the outer rod 1, allowing it to extend further or retract into the receiving groove 11, thereby adjusting the overall length of the top and bottom rods (i.e., the overall length of the inner rod 2 and the outer rod 1). Then, the locking sleeve 3 is moved so that the sleeve groove 31 fits onto the clamping ring 12, and the locking sleeve 3 is rotated. The locking sleeve 3 rotates and compresses the clamping ring 12, reducing the width of the spacer groove 121 on the clamping ring 12 to accommodate the compression of the clamping ring 12 by the inner wall of the locking sleeve 3. The clamping ring 12 then contracts, gripping and locking the inner rod 2, achieving stepless adjustment and fixation of the length of the top and bottom rods, thus adapting to the installation requirements of different security door or lock structure dimensions.

[0033] To temporarily secure inner rod 2 during the adjustment of the top and bottom rod lengths and prevent it from slipping off, refer to... Figure 5 A pressure groove 13 is provided on the side wall of the receiving groove 11, and a pre-pressure block 131 is slidably disposed in the pressure groove 13. The sliding direction of the pre-pressure block 131 is parallel to the radial direction of the outer rod 1. The pre-pressure block 131 can abut against the inner rod 2, and the surface of the pre-pressure block 131 in contact with the inner rod 2 is provided with stripes to increase the friction.

[0034] Reference Figure 3 and Figure 5The outer rod 1 is also provided with a pre-pressing component that drives the pre-pressing block 131 to slide. The pre-pressing component includes a sliding button 15. A sliding groove 14 communicating with the pressing groove 13 is opened on the outer wall of the outer rod 1. The sliding button 15 is slidably disposed in the sliding groove 14 along the axial direction of the outer rod 1. Specifically, guide grooves 141 are opened on both sides of the sliding groove 14. Guide blocks 152 are integrally formed on both sides of the sliding button 15. The guide blocks 152 correspond one-to-one with the guide grooves 141. The guide blocks 152 extend into the guide grooves 141 and slide in cooperation with the guide grooves 141. The side of the sliding button 15 facing the inner rod 2 is provided with an inclined surface 151. The end of the pre-pressing block 131 away from the inner rod 2 is provided with an arc surface. The inclined surface 151 abuts against the end of the pre-pressing block 131 away from the inner rod 2. The inclined surface 151 gradually approaches the inner rod 2 in the sliding direction of the sliding button 15. Friction textures 153 are provided on the side of the sliding button 15 away from the inner rod 2.

[0035] Reference Figure 3 and Figure 6 A movable groove 1521 is formed on the side wall of the guide block 152, and a movable block 1522 is disposed in the movable groove 1521. The movable block 1522 slides in the movable groove 1521 in the direction of retraction or extension. A ball bearing 1523 is embedded in the side of the movable block 1522 away from the end wall of the movable groove 1521. The ball bearing 1523 abuts against the side wall of the guide groove 141 and rolls on the side wall of the guide groove 141. A thrust spring 1524 is disposed between the end wall of the movable groove 1521 and the movable block 1522. One end of the thrust spring 1524 is fixedly connected to the end wall of the movable groove 1521, and the other end of the thrust spring 1524 is fixedly connected to the movable block 1522. The thrust spring 1524 drives the movable block 1522 away from the end wall of the movable groove 1521. The guide groove 141 is provided with a stop groove 1411 that is adapted to the ball 1523, and the ball 1523 can be inserted into the stop groove 1411.

[0036] Reference Figure 3 , Figure 5 and Figure 6 During the adjustment of the length of the top and bottom rods, the sliding button 15 can be pushed to slide along the sliding groove 14. When the sliding button 15 slides, the inclined surface 151 pushes the pre-pressure block 131 to move along the pressure groove 13 towards the inner rod 2, so that the pre-pressure block 131 presses against the side wall of the inner rod 2, and increases the friction through the stripes, thereby temporarily fixing the position of the inner rod 2 and preventing the inner rod 2 from sliding accidentally. The ball 1523 presses against the side wall of the guide groove 141 under the action of the thrust spring 1524. When the ball 1523 moves to the position of the stopping groove 1411, it falls into the stopping groove 1411 under the action of the spring force, producing a clear stopping sensation, thereby providing the operator with tactile position feedback to indicate that the pre-pressure block 131 has reached the position of effectively pressing the inner rod 2. Furthermore, after the thrust spring 1524 drives the ball 1523 into the stopping groove 1411, it increases the force required for the sliding button 15 to slide, preventing the sliding button 15 from sliding accidentally.

[0037] The implementation principle of a retractable top and bottom rod according to an embodiment of this application is as follows: When it is necessary to adjust the length of the top and bottom rods to adapt to different security doors or locks, first push and pull the inner rod 2 along the axis of the outer rod 1, so that the inner rod 2 extends further or retracts into the receiving groove 11 to change the overall length of the top and bottom rods. Then push the sliding button 15, and the inclined surface 151 of the sliding button 15 presses against the pre-pressing block 131, and the pre-pressing block 131 presses the inner rod 2 to achieve temporary fixation of the inner rod 2. At the same time, the ball bearing 1523 is embedded in the stop groove 1411 to provide operational feedback after pressing the inner rod 2. This facilitates quick release and fixation of the inner rod 2, so as to adjust the length of the top and bottom rods multiple times. After the length of the top and bottom rods is adjusted, move the locking sleeve 3 so that the sleeve groove 31 fits onto the clamping ring 12, and then rotate the locking sleeve 3 so that the sleeve groove 31 and the clamping ring 12 are threadedly engaged until the locking sleeve 3 abuts against the limiting block 16. During this process, the clamping ring 12 is squeezed and contracts and hugs the inner rod 2, so as to achieve the final fixation of the inner rod 2 and the outer rod 1. This allows for adjustment of the overall length of the top and bottom rods to match the distance between the top and bottom hooks on the lock body and the positioning holes on the door frame.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A retractable top and bottom pole, characterized in that: The device includes an inner rod (2) and an outer rod (1). The outer rod (1) has a receiving groove (11) at its end along the axial direction. One end of the inner rod (2) is inserted into the receiving groove (11), and the other end of the inner rod (2) extends out of the receiving groove (11). At the end of the outer rod (1) facing the opening of the receiving groove (11), a clamping ring (12) is coaxially and fixedly provided. The clamping ring (12) has several clamping rings (12) in the circumferential direction. The inner rod (2) is fitted with a locking sleeve (3) and a groove (31) is provided at one end of the locking sleeve (3) near the outer rod (1). The groove (31) can squeeze the outer wall of the clamping ring (12) and force the clamping ring (12) to shrink inward and press the inner rod (2). The groove (31) is provided with an internal thread and the outer wall of the clamping ring (12) is provided with an external thread. The internal thread and the external thread are compatible.

2. The retractable vertical pole according to claim 1, characterized in that: A pressure groove (13) is provided on the side wall of the receiving groove (11). A pre-pressure block (131) is slidably disposed in the pressure groove (13). The sliding direction of the pre-pressure block (131) is parallel to the radial direction of the outer rod (1). The pre-pressure block (131) can abut against the inner rod (2). A pre-pressure component that drives the pre-pressure block (131) to slide is also provided on the outer rod (1).

3. The retractable top and bottom pole according to claim 2, characterized in that: The pre-pressing component includes a sliding button (15). The outer wall of the outer rod (1) is provided with a sliding groove (14) that communicates with the pressure groove (13). The sliding button (15) is slidably disposed in the sliding groove (14). The side of the sliding button (15) facing the inner rod (2) is provided with an inclined surface (151). The inclined surface (151) abuts against the end of the pre-pressing block (131) away from the inner rod (2). The inclined surface (151) gradually approaches the inner rod (2) in the sliding direction of the sliding button (15).

4. A retractable vertical pole according to claim 3, characterized in that: The slide groove (14) has guide grooves (141) on both sides, and the slide button (15) has guide blocks (152) integrally formed on both sides. The guide blocks (152) correspond one-to-one with the guide grooves (141). The guide blocks (152) extend into the guide grooves (141) and slide and cooperate with the guide grooves (141).

5. A retractable vertical pole according to claim 4, characterized in that: The guide block (152) has a movable groove (1521), and a movable block (1522) is provided in the movable groove (1521). A ball (1523) is embedded in the movable block (1522) on the side away from the end wall of the movable groove (1521). The ball (1523) abuts against the side wall of the guide groove (141) and rolls on the side wall of the guide groove (141).

6. A retractable vertical pole according to claim 5, characterized in that: The movable block (1522) slides in the movable groove (1521) along the direction of retraction or extension. A thrust spring (1524) is provided between the end wall of the movable groove (1521) and the movable block (1522). The thrust spring (1524) drives the movable block (1522) away from the end wall of the movable groove (1521). A stopping groove (1411) adapted to the ball (1523) is provided in the guide groove (1411). The ball (1523) can be inserted into the stopping groove (1411).

7. A retractable vertical pole according to claim 3, characterized in that: The slider (15) has a friction texture (153) on the side away from the inner rod (2).

8. A retractable vertical pole according to claim 1, characterized in that: A limiting block (16) is fixedly provided on the outer wall of the outer rod (1), and the locking sleeve (3) can abut against the limiting block (16).

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