Tooth lock telescopic pipe

Abstract

The utility model discloses a tooth lock telescopic pipe which comprises a front pipe and a rear pipe, the rear pipe is provided with an adjusting hole and a plurality of limiting teeth, the limiting teeth are arranged at intervals in the length direction of the adjusting hole to form a plurality of limiting grooves, and one end of the front pipe is inserted into the adjusting hole and can move relative to the rear pipe along the adjusting hole. The end, inserted into the rear pipe, of the front pipe is movably connected with a clamping and ejecting block matched with the limiting groove in an inserted mode, and when the front pipe moves relative to the rear pipe, the clamping and ejecting block is driven away from the limiting groove through the limiting teeth and then moves into the other adjacent limiting groove. A plurality of limiting teeth which are arranged at intervals and form a plurality of limiting grooves are arranged in the rear pipe, and a clamping and jacking block which is matched with the limiting grooves in an inserted mode and moves into another adjacent limiting groove after the limiting teeth drive the limiting grooves when the front pipe moves relative to the rear pipe is arranged on the front pipe, so that the front pipe can be locked and unlocked in the moving direction of the front pipe. When the front pipe moves relative to the rear pipe, locking can be achieved under various telescopic lengths through cooperation of the clamping and ejecting block and the multiple limiting grooves, the stretching lengths are various, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of photographic equipment, in particular to a toothed lock telescopic tube. Background Art

[0002] A telescopic rod is a support rod with adjustable length and is widely used in the field of photographic equipment, such as selfie sticks, tripods, etc. The existing telescopic rod is composed of several pipe fittings sleeved in sequence. Among two adjacent pipe fittings, one pipe fitting is provided with a jack, and the other pipe fitting is provided with a clamping block that can move relative to it in the radial direction. In the storage state, the clamping block retracts into the pipe fitting and is axially offset from the jack. In the stretched state, the clamping block protrudes from the pipe fitting and is inserted into the jack, so that the two pipe fittings are locked in the stretched state. However, since one clamping block is paired with one jack, the stretching length of the telescopic rod is unique, which is inconvenient to use. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a toothed lock telescopic tube to solve the problem that the existing telescopic rod realizes the locking of the telescopic state through one clamping block and one jack, the stretching length is unique, and it is inconvenient to use.

[0004] The utility model is realized by the following technical solutions:

[0005] The toothed lock telescopic tube includes a front tube and a rear tube. The rear tube has an adjustment hole and a plurality of limit teeth. The plurality of limit teeth protrude from the hole wall of the adjustment hole and are spaced at intervals in the length direction of the adjustment hole to form a plurality of limit slots. One end of the front tube is inserted into the adjustment hole and can move relative to the rear tube along the adjustment hole. A clamping top block that is movably connected to the end of the front tube inserted into the rear tube and is inserted and matched with the limit slot. When the front tube moves relative to the rear tube, the clamping top block is driven by the limit teeth to move out of the limit slot and into another adjacent limit slot.

[0006] Further, the limit slot has a front abutting surface. When the clamping top block is inserted and matched with the limit slot, the front abutting surface is located in front of the clamping top block. The front abutting surface slopes backward from the inside to the outside, and the clamping top block has a rear abutting surface that is obliquely pushed and matched with the front abutting surface.

[0007] Further, a plurality of the limit teeth spaced at intervals in the length direction of the adjustment hole form a limit rack. Both the limit rack and the clamping top block are two and correspond to each other one by one. The two clamping top blocks are opposite to each other in the radial direction of the front tube and are staggered in the axial direction of the front tube. When the front tube moves relative to the rear tube, the two clamping top blocks synchronously move into or out of the corresponding limit slots.

[0008] Further, an elastic member for driving the clamping top block to move into the limit slot is provided in the front tube, and a positioning hole for inserting one end of the elastic member is formed on the clamping top block.

[0009] Further, the front tube can rotate relative to the rear tube to move the clamping and propping block away from the limiting groove in the circumferential direction of the front tube. A reset member is provided on the front tube and the rear tube. When the front tube rotates relative to the rear tube, the reset member gives the front tube a tendency to rotate in the reverse direction, so that the clamping and propping block can be moved back to be clamped into the limiting groove.

[0010] Further, a front connecting member that moves and rotates synchronously with the front tube is provided inside the front tube. A rear connecting member that rotates synchronously with the rear tube is provided in the adjusting hole. The rear connecting member is rotatably connected to the front connecting member and can move synchronously with the front tube relative to the rear tube. The reset member is a torsion spring with one end connected to the front connecting member and the other end connected to the rear connecting member. The front connecting member is provided with the clamping and propping block and an elastic member for driving the clamping and propping block into the limiting groove.

[0011] Further, the front connecting member and the rear connecting member enclose a receiving cavity for receiving the reset member. The front connecting member is provided with a front fixing hole for inserting one end of the reset member, and the rear connecting member is provided with a rear fixing hole for inserting the other end of the reset member.

[0012] Further, the front tube is provided with a through hole for the clamping and propping block to pass through. The front connecting member is provided with a guiding hole for the clamping and propping block and the elastic member to be placed in, and the clamping and propping block extends out of or retracts into the front tube along the guiding hole from the through hole.

[0013] Further, several limiting teeth spaced apart in the length direction of the adjusting hole form a limiting rack. The rear connecting member is provided with a limiting tooth groove that slidably cooperates with the limiting rack to limit the rotation of the rear connecting member relative to the rear tube.

[0014] Further, the front tube is spaced apart from the hole wall of the adjusting hole to form an assembly gap. One end of the front tube inserted into the rear tube is provided with a damping piece received in the assembly gap. There are 2 damping pieces, and the two damping pieces are oppositely arranged in the radial direction of the front tube to form a guiding gap that slidably cooperates with the limiting rack; one end of the rear tube for the front tube to be inserted into is provided with a stop member, and the stop member partially extends into the adjusting hole to abut against the damping piece before and after to limit the front tube from moving away from the rear tube.

[0015] The advantages of this technical solution are as follows: By arranging several limiting teeth spaced apart to form several limiting grooves in the rear tube and arranging a clamping and propping block on the front tube that is inserted and cooperates with the limiting groove and is driven away from the limiting groove by the limiting teeth and then moves into an adjacent another limiting groove when the front tube moves relative to the rear tube, the front tube can be locked and unlocked in its moving direction, that is, when the front tube moves relative to the rear tube, through the cooperation of one clamping and propping block and multiple limiting grooves, locking can be achieved at various telescopic lengths, with a variety of stretching lengths and convenient use. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments.

[0018] Figure 1 is the three-dimensional view of the tooth lock telescopic tube disclosed in the embodiment;

[0019] Figure 2 is the front view of the tooth lock telescopic tube disclosed in the embodiment;

[0020] Figure 3 is Figure 2 the cross-sectional view at A-A in

[0021] Figure 4 is Figure 3 the enlarged partial view at D in

[0022] Figure 5 is Figure 4 the enlarged partial view at E in

[0023] Figure 6 is Figure 2 the cross-sectional view at B-B in

[0024] Figure 7 is Figure 2 the cross-sectional view at C-C in

[0025] Figure 8 is the exploded view of the tooth lock telescopic tube disclosed in the embodiment;

[0026] Figure 9 is Figure 8 the enlarged partial view at F in Detailed implementation manners

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0028] Embodiment: As Figures 1-9As shown in the figure, the toothed lock telescopic tube is applied to photographic auxiliary equipment such as selfie sticks and tripods. It includes a front tube 1 and a rear tube 2. The rear tube 2 has an adjustment hole 201 and a number of limit teeth 202. The number of limit teeth 202 protrudes from the hole wall of the adjustment hole 201 and is arranged at intervals in the length direction of the adjustment hole 201 to form a number of limit slots 203. One end of the front tube 1 is inserted into the adjustment hole 201 and can move relative to the rear tube 2 along the adjustment hole 201. A clamping top block 3 that is inserted and matched with the limit slot 203 is movably connected to the end of the front tube 1 inserted into the rear tube 2. When the front tube 1 moves relative to the rear tube 2, the clamping top block 3 is driven away from the limit slot 203 by the limit teeth 202 and then moves into another adjacent limit slot 203. This embodiment provides a toothed lock telescopic tube to solve the problem that the existing telescopic rod uses a clamping block and a jack to lock the telescopic state, the stretching length is unique, and it is inconvenient to use. It mainly configures a number of limit teeth 202 that are arranged at intervals in the rear tube 2 to form a number of limit slots 203, and configures a clamping top block 3 on the front tube 1 that is inserted and matched with the limit slot 203 and is driven away from the limit slot 203 by the limit teeth 202 and then moves into another adjacent limit slot 203 when the front tube 1 moves relative to the rear tube 2, so that the front tube 1 can be locked and unlocked in its moving direction, that is, when the front tube 1 moves relative to the rear tube 2, the cooperation of a clamping top block 3 and multiple limit slots 203 can achieve locking at various telescopic lengths, the stretching lengths are diverse, and it is convenient to use.

[0029] In the embodiment of the present invention, the limit slot 203 has a front abutting surface 204. The front abutting surface 204 is located in front of the clamping top block 3 when the clamping top block 3 is inserted and matched with the limit slot 203. The front abutting surface 204 slopes backward from the inside to the outside. The clamping top block 3 has a rear abutting surface 301 that is obliquely pushed and matched with the front abutting surface 204. The above setting makes the front tube 1 move smoothly and have a good stretching effect when moving forward relative to the rear tube 2 to stretch the length by configuring the side of the limit slot 203 in front of the clamping top block 3 to slope backward from the inside to the outside and configuring the side of the clamping top block 3 opposite to the front abutting surface 204 to be obliquely pushed and matched with the front abutting surface 204.

[0030] In the embodiment of the present invention, a number of limit teeth 202 arranged at intervals in the length direction of the adjustment hole 201 form a limit tooth bar 205. Both the limit tooth bar 205 and the clamping top block 3 are two and correspond one by one. The two clamping top blocks 3 are opposite in the radial direction of the front tube 1 and are staggered in the axial direction of the front tube 1. When the front tube 1 moves relative to the rear tube 2, the two clamping top blocks 3 synchronously move into or out of the corresponding limit slots 203. The above setting makes the front tube 1 and the rear tube 2 have a good locking effect by configuring the limit tooth bar 205 and the clamping top block 3 to be two. Also, because the two clamping top blocks 3 are opposite in the radial direction of the front tube 1 and are staggered in the axial direction of the front tube 1, when the two clamping top blocks 3 are respectively inserted into the corresponding limit slots 203, the front tube 1 can be locked on the rear tube 2 at different positions in the axial direction, and the locking effect is good.

[0031] In the embodiment of the present utility model, an elastic member 4 for driving the clamping top block 3 to move into the limiting groove 203 is provided inside the front tube 1. Specifically, the elastic member 4 is a spring. The above setting is configured with the elastic member 4 that drives the clamping top block 3 into the limiting groove 203 inside the front tube 1, so that the clamping top block 3 can be driven away from the limiting groove 203 by the limiting teeth 202 and move into another adjacent limiting groove 203 when the front tube 1 moves relative to the rear tube 2. The structure is simple and the implementation is convenient.

[0032] In the embodiment of the present utility model, a positioning hole 302 for inserting one end of the elastic member 4 is formed on the clamping top block 3. The above setting is configured with the positioning hole 302 for inserting one end of the elastic member 4 on the clamping top block 3, so that the elastic member 4 and the clamping top block 3 are stably assembled.

[0033] In the embodiment of the present utility model, the front tube 1 can rotate relative to the rear tube 2 to drive the clamping top block 3 to move away from the limiting groove 203 in the circumferential direction of the front tube 1. A reset member 5 is provided on the front tube 1 and the rear tube 2. When the front tube 1 rotates relative to the rear tube 2, the reset member 5 makes the front tube 1 have a reverse rotation tendency, so that the clamping top block 3 can move back to its position and be inserted into the limiting groove 203. The above setting is configured such that the front tube 1 can rotate relative to the rear tube 2, and the reset member 5 that makes the front tube 1 have a reverse rotation tendency when the front tube 1 rotates relative to the rear tube 2 is provided on the front tube 1 and the rear tube 2. Thus, the front tube 1 can be rotated to unlock (the clamping top block 3 moves away from the limiting groove 203) and retract backward, and can be rotated to reset and lock (the clamping top block 3 is reinserted into the limiting groove 203) after retracting in place. The operation is quick and simple.

[0034] In the embodiment of the present utility model, a front connecting member 6 that moves and rotates synchronously with the front tube 1 is provided inside the front tube 1. A rear connecting member 7 that rotates synchronously with the rear tube 2 is provided inside the adjusting hole 201. The rear connecting member 7 is rotatably connected to the front connecting member 6 and can move synchronously with the front tube 1 relative to the rear tube 2. The reset member 5 is a torsion spring with one end connected to the front connecting member 6 and the other end connected to the rear connecting member 7. The front connecting member 6 is provided with the clamping top block 3 and the elastic member 4 for driving the clamping top block 3 to move into the limiting groove 203. The above setting is configured with the front connecting member 6 inside the front tube 1, the rear connecting member 7 inside the rear tube 2, the clamping top block 3 and the elastic member 4 are configured on the front connecting member 6, and the reset member 5 is a torsion spring respectively connected to the front connecting member 6 and the rear connecting member 7, so that the front tube 1 has a reverse rotation tendency when it rotates relative to the rear tube 2. The structure is simple and compact.

[0035] In the embodiment of the present utility model, the front connecting member 6 and the rear connecting member 7 enclose to form a receiving cavity 8 for accommodating the reset member 5. The front connecting member 6 is provided with a front fixing hole 601 for inserting one end of the reset member 5, and the rear connecting member 7 is provided with a rear fixing hole 701 for inserting the other end of the reset member 5. The above setting is configured such that the front connecting member 6 and the rear connecting member 7 enclose to form the receiving cavity 8, the reset member 5 is accommodated in the receiving cavity 8 and the two free ends are respectively inserted and matched with the front connecting member 6 and the rear connecting member 7. Therefore, the reset member 5 is stably connected to the front connecting member 6 and the rear connecting member 7, and has good reset ability.

[0036] In the embodiment of the present utility model, the front tube 1 is provided with a through hole 101 for the card top block 3 to pass through, and the front connecting piece 6 is provided with a guiding hole 602 for the card top block 3 and the elastic member 4 to be placed therein. The card top block 3 extends out of or retracts into the front tube 1 along the guiding hole 602 from the through hole 101. The above arrangement makes the assembly of the front connecting piece 6, the front tube 1, the card top block 3 and the elastic member 4 stable by configuring the guiding hole 602 for the card top block 3 and the elastic member 4 on the front connecting piece 6 and the through hole 101 for the card top block 3 to extend out of or retract into the front tube 1 on the front tube 1.

[0037] In the embodiment of the present utility model, the rear connecting piece 7 is provided with a limiting tooth groove 702 that slidably cooperates with the limiting rack 205 to limit the rotation of the rear connecting piece 7 relative to the rear tube 2. The above arrangement makes the rear connecting piece 7 able to move along the rear tube 2 and be circumferentially fixed to the rear tube 2 by configuring the limiting tooth groove 702 on the rear connecting piece 7 that slidably cooperates with the limiting rack 205 to limit the rotation of the rear connecting piece 7 relative to the rear tube 2, with a simple structure and convenient implementation.

[0038] In the embodiment of the present utility model, the front tube 1 is spaced from the inner wall of the adjusting hole 201 to form an assembly gap (not marked in the figure). One end of the front tube 1 inserted into the rear tube 2 is provided with a damping piece 9 accommodated in the assembly gap. There are two damping pieces 9, and the two damping pieces 9 are oppositely arranged in the radial direction of the front tube 1 to form a guiding gap (not marked in the figure) that slidably cooperates with the limiting rack 205. The above arrangement makes the front tube 1 have a jerky feeling when moving relative to the rear tube 2 and increases the friction between the two tubes after moving in place (in the locked state) by configuring the damping piece 9 between the front tube 1 and the rear tube 2, with a good locking effect.

[0039] In the embodiment of the present utility model, one end of the rear tube 2 for the front tube 1 to be inserted is provided with a stop member 10. The stop member 10 partially extends into the adjusting hole 201 to abut against the front and rear of the damping piece 9 to limit the front tube 1 from moving away from the rear tube 2. The above arrangement makes the assembly of the front tube 1 and the rear tube 2 stable and prevents the front tube 1 from detaching by configuring the stop member 10 on the rear tube 2 that partially extends into the adjusting hole 201 to abut against the front and rear of the damping piece 9 to limit the front tube 1 from moving away from the rear tube 2.

[0040] It should be understood that in the present utility model, terms such as "first" and "second" are used to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present utility model, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information. In addition, the orientation or positional relationship indicated by terms such as "center of the circle", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0041] As described above, one or more embodiments are provided in combination with specific content, and it is not determined that the specific implementation of the present utility model is only limited to these descriptions. Any approximation, similarity to the method, structure, etc. of the present utility model, or several technical deductions or substitutions made under the premise of the concept of the present utility model should be regarded as within the protection scope of the present utility model.

Claims

1. Tooth lock telescopic tube, comprising a front tube (1) and a rear tube (2), characterized in that, The rear tube (2) has an adjustment hole (201) and a number of limit teeth (202). A number of the limit teeth (202) protrude from the wall of the adjustment hole (201) and are spaced apart in the length direction of the adjustment hole (201) to form a number of limit slots (203). One end of the front tube (1) is inserted into the adjustment hole (201) and can move relative to the rear tube (2) along the adjustment hole (201). A clamping and pushing block (3) that is in plug-in fit with the limit slot (203) is movably connected to the end of the front tube (1) inserted into the rear tube (2). When the front tube (1) moves relative to the rear tube (2), the clamping and pushing block (3) is driven by the limit teeth (202) to move out of the limit slot (203) and then move into another adjacent limit slot (203).

2. The telescopic tube with a toothed lock according to claim 1, characterized in that, The limit slot (203) has a front abutting surface (204). When the clamping and pushing block (3) is in plug-in fit with the limit slot (203), the front abutting surface (204) is located in front of the clamping and pushing block (3). The front abutting surface (204) slopes backward from the inside to the outside. The clamping and pushing block (3) has a rear abutting surface (301) that is in inclined pushing fit with the front abutting surface (204).

3. The telescopic tube with a toothed lock according to claim 1, characterized in that, A number of the limit teeth (202) spaced apart in the length direction of the adjustment hole (201) form a limit rack (205). There are 2 limit racks (205) and 2 clamping and pushing blocks (3), which correspond to each other one by one. The two clamping and pushing blocks (3) are opposite to each other in the radial direction of the front tube (1) and are offset in the axial direction of the front tube (1). When the front tube (1) moves relative to the rear tube (2), the two clamping and pushing blocks (3) synchronously move into or out of the corresponding limit slots (203).

4. The telescopic pipe with a toothed lock according to claim 1, characterized in that, An elastic member (4) for driving the clamping and pushing block (3) to move into the limit slot (203) is provided inside the front tube (1). A positioning hole (302) for one end of the elastic member (4) to be inserted is formed on the clamping and pushing block (3).

5. The telescopic tube with a toothed lock according to claim 1, characterized in that, The front tube (1) can rotate relative to the rear tube (2) to make the clamping and pushing block (3) move away from the limit slot (203) in the circumferential direction of the front tube (1). A reset member (5) is provided on the front tube (1) and the rear tube (2). When the front tube (1) rotates relative to the rear tube (2), the reset member (5) makes the front tube (1) have a tendency to rotate in the reverse direction, so that the clamping and pushing block (3) can move back and be clamped into the limit slot (203).

6. The telescopic tube with a toothed lock according to claim 5, characterized in that, A front connecting member (6) that moves and rotates synchronously with the front tube (1) is provided inside the front tube (1). A rear connecting member (7) that rotates synchronously with the rear tube (2) is provided in the adjustment hole (201). The rear connecting member (7) is rotatably connected to the front connecting member (6) and can move synchronously with the front tube (1) relative to the rear tube (2). The reset member (5) is a torsion spring with one end connected to the front connecting member (6) and the other end connected to the rear connecting member (7). The front connecting member (6) is provided with the clamping and pushing block (3) and the elastic member (4) for driving the clamping and pushing block (3) to move into the limit slot (203).

7. The telescopic pipe with a toothed lock according to claim 6, wherein, The front connecting member (6) and the rear connecting member (7) enclose a receiving cavity (8) for receiving the reset member (5). The front connecting member (6) is provided with a front fixing hole (601) for one end of the reset member (5) to be inserted, and the rear connecting member (7) is provided with a rear fixing hole (701) for the other end of the reset member (5) to be inserted.

8. The telescopic tube with a toothed lock according to claim 6, characterized in that, The front tube (1) is provided with a through hole (101) for the clamping and pushing block (3) to pass through. The front connecting member (6) is provided with a guiding hole (602) for the clamping and pushing block (3) and the elastic member (4) to be placed. The clamping and pushing block (3) extends out of or retracts into the front tube (1) along the guiding hole (602) from the through hole (101).

9. The telescopic tube with a toothed lock according to claim 6, characterized in that, A plurality of the limiting teeth (202) spaced apart in the length direction of the adjusting hole (201) constitute a limiting rack (205). The rear connecting member (7) is provided with a limiting tooth groove (702) that is slidably engaged with the limiting rack (205) to limit the rotation of the rear connecting member (7) relative to the rear tube (2).

10. The telescopic tube with a toothed lock according to claim 3, characterized in that, An assembly gap is formed by spacing the front tube (1) from the inner wall of the adjusting hole (201). One end of the front tube (1) inserted into the rear tube (2) is provided with damping sheets (9) received in the assembly gap. There are two damping sheets (9), and the two damping sheets (9) are oppositely arranged in the radial direction of the front tube (1) to form a guiding gap that is slidably engaged with the limiting rack (205). One end of the rear tube (2) for the front tube (1) to be inserted is provided with a stopper (10). The stopper (10) partially extends into the adjusting hole (201) to abut against the damping sheets (9) front and back to limit the front tube (1) from moving away from the rear tube (2).

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