CN211475386U - Telescopic device - Google Patents

Abstract

The utility model relates to the technical field of telescopic equipment, and discloses a telescopic device, which comprises a fixed base, a pushing table, a telescopic mechanism, a transmission mechanism and a rotation stopping part, wherein the lower surface of the pushing table is provided with a push rod, and the end part of the push rod is provided with a first stopping part; the telescopic mechanism is connected between the pushing platform and the fixed base and is used for driving the pushing platform to switch between a storage position and a use position; the transmission mechanism comprises a moving part, a rotating part and a resetting piece, wherein the rotating part is used for rotating along with the movement of the moving part, and the resetting piece is used for resetting the moving part; the rotation stopping part is connected with the rotation part, at least one second stopping part is constructed in the rotation circumferential direction of the rotation stopping part, and the second stopping part is driven by the rotation part to rotate and is clamped with or separated from the first stopping part. The telescopic device well meets the lifting and accommodating requirements of household, automobile and office on some electric appliances, tools and auxiliary articles, and has the advantages of high reliability, low relative cost, no need of power supply and the like.

Description

Telescopic device

Technical Field

The utility model relates to a telescopic equipment technical field especially relates to a telescoping device.

Background

With the development of society and the improvement of the daily living standard of people, tools and electric appliances used in households and offices, auxiliary articles on household appliances, vehicles and equipment and the like are more and more, and the articles are more widely stored in a hidden manner. Thus, the mechanical lifting structure having wide field adaptability is more advantageous, and is more popular because it is not limited by power supply and wiring.

The prior art scheme has the following several:

(1) electric push rod scheme: the electric push rod, the auxiliary structure fixed in the installation and the control switch are adopted to realize the lifting. As shown in FIG. 1, the electric push rod of this solution adopts a transmission structure manner such as a motor 101, a gear box 102, a screw nut structure 103, etc. to drive a lifting rod 104 to lift, wherein an object to be lifted is fixed on the top end of the lifting rod 104.

Besides a mechanical structure, the scheme also needs to increase a plurality of external fixing structures, a control system, a switch and the like, the structure is relatively complex, a power supply is always needed to be provided in a use environment, the problems of wiring and wiring exist, and the cost is relatively high.

(2) The structure is pushed and withdrawn for Card slot of fast memory Card (Trans-flash Card, TF Card for short): as shown in fig. 2, the structural principle of this solution is that the hook spring 202 moves along the guide groove 201 by using the guide groove 201, when the TF card 203 is pushed in, the hook spring 202 goes from the first position to the second position, when the hand is released, the hook spring 202 slightly falls back to the third position, so that the hook spring 202 hooks the guide groove 201, and thus the TF card 203 is in the entering state; and pushing the TF card 203 again, wherein the hook spring 202 leaves from the position (the third position) to the position (the fourth position), and after the hand is released, the hook spring 202 returns to the position (the fourth position) under the action of the card slot spring 204, so that the TF card 203 is withdrawn.

The proposal is suitable for being used under the conditions of light weight and micro load, but the defects of overlarge spring force, difficult operation and pressing, overlarge friction force of a hook spring structure, poor reliability of the hook spring structure and the like are caused for large load and large component device. The structure is convenient and reliable to use under the conditions of light weight and micro load, but the function is difficult to realize for a large load and a large part device, and the reliability of the hook spring structure is poor.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a telescoping device for solve current elevating system and be difficult to be suitable for great load, frictional resistance big, the poor problem of reliability.

An embodiment of the utility model provides a telescoping device, include:

a fixed base;

the pushing platform is arranged opposite to the fixed base, a push rod is constructed on the surface, facing the fixed base, of the pushing platform, the push rod extends towards the fixed base, and a first stop piece is constructed at the end part of the push rod;

the telescopic mechanism is connected between the pushing platform and the fixed base and is used for driving the pushing platform to switch between a storage position and a use position;

the transmission mechanism comprises a moving part, a rotating part and a reset piece, wherein the moving part is provided with a pressing part for pushing and pressing the push rod; the rotating shaft of the rotating part is rotatably arranged on the fixed base, and the rotating part is matched with the moving part to rotate along with the movement of the moving part; the reset piece is used for resetting the moving part;

the rotation stopping part is connected with the rotation part, at least one second stopping part is constructed in the rotation circumferential direction of the rotation stopping part, and the second stopping part is driven by the rotation part to rotate and is clamped with the first stopping part at the storage position or separated from the first stopping part at the use position.

The rotating part further comprises a rotating body which is rotatably connected to the rotating shaft, the rotating stopping part is installed on the rotating shaft, and the one-way locking part is installed at the joint of the rotating body and the rotating shaft or the joint of the rotating stopping part and the rotating shaft.

Wherein, it resets for elasticity to reset the piece, elasticity reset the one end of piece connect in remove the portion, elasticity reset the other end of piece connect in unable adjustment base, just elasticity resets the flexible direction of piece and is on a parallel with telescopic machanism's flexible direction.

The elastic reset piece comprises a sliding rod and a reset spring sleeved on the sliding rod, a first baffle connected to the moving part is arranged at one end of the sliding rod, the first baffle is located between the pushing platform and the fixed base, the other end of the sliding rod penetrates through the fixed base and is provided with a second baffle, and the second baffle is located on one side, away from the first baffle, of the fixed base; the return spring is installed between the first baffle and the fixed base.

The sliding rod is provided with a first baffle, a second baffle, a sliding base and a pushing platform, wherein the sliding rod is further provided with a limiting plate, and the limiting plate is located between the first baffle and the second baffle and located on one side, facing the pushing platform, of the fixed base.

The movable part is a rack, the rotating body is a gear meshed with the rack, and the length direction of the rack is parallel to the telescopic direction of the telescopic mechanism.

The number of the second stop parts is multiple, and the second stop parts are distributed at intervals along the rotation circumferential direction of the rotation stop part.

The fixed base is provided with a first sleeve on one side facing the pushing table, the axial direction of the first sleeve is parallel to the telescopic direction of the telescopic mechanism, and the telescopic mechanism, the transmission mechanism and the rotation stopping part are all positioned in the first sleeve; one side of the pushing table, which faces the fixed base, is also provided with a second sleeve, and the second sleeve is sleeved on the first sleeve.

The telescopic mechanism comprises a supporting spring, one end of the supporting spring is abutted to be arranged on one side of the pushing platform facing the fixed base, and the other end of the supporting spring is abutted to be arranged on one side of the fixed base facing the pushing platform.

The telescopic mechanism further comprises a damping assembly, the damping assembly comprises a guide pipe filled with damping oil inside and a guide rod with one end inserted into the guide pipe, and the supporting spring is sleeved on the guide pipe;

the guide pipe is connected to one side, facing the fixed base, of the pushing table, and one end, extending out of the guide pipe, of the guide rod is connected to one side, facing the pushing table, of the fixed base;

or one end of the guide rod extending out of the guide pipe is connected to one side, facing the fixed base, of the pushing table, and the guide pipe is connected to one side, facing the pushing table, of the fixed base.

The embodiment of the utility model provides a telescopic device, including unable adjustment base, pushing platform, telescopic machanism, drive mechanism and rotation backstop portion, drive the pushing platform through telescopic machanism and be close to or keep away from unable adjustment base reciprocally, in order to switch between take-in position and service position; the transmission mechanism comprises a moving part and a rotating part matched with the moving part, the moving part is pushed and pressed to move by the push rod, and then the rotating part rotates along with the movement of the moving part; the rotation stopping part is connected with the rotation part, and the second stopping part constructed on the rotation stopping part is driven by the rotation part to rotate and is clamped or separated from the first stopping part on the push rod. When the user bulldozes for the first time and pushes away and press the platform, and then when compressing telescopic machanism, push away and press the platform and be close to unable adjustment base along with, the push rod pushes away and presses the splenium on the moving part, and then drives the moving part and remove to unable adjustment base, the rotating part rotates along with, and then the rotation backstop portion also rotates along with, the second backstop portion is rotatory to the position that can block first backstop portion, then the user release pushes away and presses the platform, second backstop portion block in first backstop portion, push away at this moment and press the platform and be in the position of accomodating, the moving. When the user bulldozes the push platform once more, the removal portion removes to unable adjustment base once more, and rotation portion, rotation backstop portion and second stop part all rotate thereupon, and the second stop part has left the position that can block first stop part, then the user releases the push platform, because the second stop part has broken away from first stop part, therefore the push platform moves to the position of use under telescopic machanism's extension effect. The telescopic device well meets the lifting and accommodating requirements of household, automobile and office rooms on some electric appliances, tools and auxiliary articles, and has the characteristics of high reliability, low relative cost, no need of power supply, wide use environment and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a prior art electric putter;

FIG. 2 is a schematic diagram of a push-in and pull-out configuration of a TF stop slot in the prior art;

fig. 3 is a schematic view of a first push-to-end state of the telescopic device in the embodiment of the present invention;

FIG. 4 is a schematic view of the telescoping device of FIG. 3 shown in a first push to the end and then released;

fig. 5 is a side view of a retractor device in an embodiment of the invention;

FIG. 6 is a schematic view of the telescoping device being pushed to the bottom a second time based on FIG. 4;

FIG. 7 is a schematic view of the telescoping device of FIG. 6 shown released after a second depression;

description of reference numerals:

101: a motor; 102: a gear case; 103: a lead screw nut structure;

104: a lifting rod; 201: a guide groove; 202: a hook spring;

203: TF card; 204: a card slot spring;

1: a fixed base; 2: a pushing and pressing table; 21: a push rod;

22: a first stopper; 3: a telescoping mechanism; 31: supporting the spring;

32: a damping assembly; 321: a guide tube; 322: a guide bar;

323: damping oil; 4: a transmission mechanism; 41: a rack;

411: the rack pushes and presses the table top; 42: a gear; 43: a one-way bearing;

44: an elastic reset member; 441: a slide bar; 442: a return spring;

443: a first baffle plate; 444: a second baffle; 445: a limiting plate;

5: a rotation stopper; 51: a second stopper; 52: a rotating shaft mounting seat of a rotating stopping part;

6: a first sleeve; 7: a second sleeve; 8: rotating shaft mounting base of the rotating part.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "first" and "second" are used for clearly indicating the numbering of the product parts and do not represent any substantial difference unless explicitly stated or limited otherwise. "upper", "lower", and the like are used only to indicate relative positional relationships, and when the absolute position of the object to be described is changed, the relative positional relationships may also be changed accordingly. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

It is to be understood that, unless otherwise expressly specified or limited, the term "coupled" is used broadly, and may, for example, refer to directly coupled devices or indirectly coupled devices through intervening media. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

As shown in fig. 3 to 7, the embodiment of the present invention provides a telescopic device, including unable adjustment base 1, push platform 2, telescopic machanism 3, drive mechanism 4 and rotation backstop portion 5, push platform 2 and unable adjustment base 1 set up relatively, push platform 2 towards unable adjustment base 1's surface structure push rod 21, push rod 21 extends towards unable adjustment base 1, the tip structure of push rod 21 has first backstop member 22. The telescopic mechanism 3 is connected between the pushing platform 2 and the fixed base 1 and is located on one side of the push rod 21, and the telescopic mechanism 3 is used for driving the pushing platform 2 to be switched between the storage position and the use position. The transmission mechanism 4 includes a moving portion, a rotating portion and a reset member, and the moving portion is provided with a pressing portion for pushing the push rod 21. The rotating shaft of the rotating part is rotatably arranged on the fixed base 1, and the rotating part is matched with the moving part to rotate along with the movement of the moving part. The reset piece is used for resetting the moving part. The rotation stopping portion 5 is connected with the rotation portion, at least one second stop member 51 is configured in the rotation circumferential direction of the rotation stopping portion 5, the second stop member 51 is driven by the rotation portion to rotate and is clamped or separated with the first stop member 22, so that the pushing and pressing table 2 is kept at the storage position during clamping, or the pushing and pressing table 2 is driven by the telescopic mechanism 3 to move to the use position during separation.

The storage position refers to a hidden storage position where the pushing table 2 is not needed to be used, and when the pushing table is located at the storage position, the telescopic mechanism 3 is in a contracted state, and at this time, the pushing table 2 can be lower than surrounding equipment. As shown in fig. 4, which is a state diagram when the pushing platform 2 is at the storage position, the first stop member 22 and the second stop member 51 are engaged together, so as to prevent the pushing platform 2 from being lifted by the telescopic mechanism 3, and thus the pushing platform 2 is kept at the storage position.

The position of use is the position of the push table 2 when it is put into use, in which case it can project from the surrounding equipment. As shown in fig. 7, the state when the push table 2 is released is schematically illustrated, in which the first stopper 22 and the second stopper 51 are disengaged from each other, the push table 2 is in a raised state, and when the push table 2 is raised to a limit position, the push table 2 is finally moved to a use position by the stretching action of the telescopic mechanism 3.

Taking the case of a telescopic device in a lifting form as an example, the article to be stored is fixed on the upper surface of the pushing and pressing table 2, and the telescopic device is installed under the table top. When the article is not used, the pushing and pressing table 2 and the article are both positioned at a low position below the desktop and are further hidden, and the pushing and pressing table 2 is positioned at a storage position at the moment; when the article is needed to be used, the pushing and pressing table 2 and the article are both positioned at a high position above the desktop and are further highlighted, and the pushing and pressing table 2 is positioned at the using position at the moment.

Specifically, unable adjustment base 1 with push away and press platform 2 to be the pedestal of two relative settings, telescopic machanism 3's length can be adjusted, telescopic machanism 3's one end is connected in unable adjustment base 1, and the other end is connected in pushing away and pressing platform 2, therefore can drive through telescopic machanism 3's concertina movement and push away and press platform 2 and be close to or keep away from unable adjustment base 1. The telescopic mechanism 3 can be an elastic piece, and when the telescopic mechanism 3 is extruded by external force, the telescopic mechanism 3 can contract and deform, so that the pushing table 2 is close to the fixed base 1; when the external force is removed, the telescopic mechanism 3 is re-extended and restored to the original state, so that the pushing platform 2 is far away from the fixed base 1.

The transmission mechanism 4 includes a moving portion and a rotating portion which are matched with each other, and can convert a reciprocating movement into a rotating movement, for example, a rack and pinion structure, a worm and gear structure, or a lead screw nut structure, etc. can be adopted. As shown in fig. 5, a surface of the fixing base 1 facing the pushing table is provided with a rotating part rotating shaft mounting seat 8, and a rotating shaft of the rotating part may be mounted to the rotating part rotating shaft mounting seat 8 through a rolling bearing to support the rotating part. Rotation backstop portion 5 can with rotation portion coaxial coupling, further more, still can be equipped with rotation backstop portion pivot mount pad 52 on the unable adjustment base 1, the pivot of rotating backstop portion 5 also can be installed in rotation backstop portion pivot mount pad 52 through antifriction bearing, can make rotation portion and rotation backstop portion 5's support more firm through two pivot mount pads.

When the pushing and pressing table 2 is continuously close to the fixed base 1, the push rod 21 contacts the pressing part on the moving part for pushing and pressing the push rod 21, the moving part is driven to translate towards the fixed base 1, the rotating part and the rotating stopping part 5 are driven to rotate, and the second stopping part 51 rotates along with the rotating shaft of the rotating part until the position where the second stopping part 51 is clamped with the first stopping part 22 is rotated; when the external force is released, the pushing platform 2 is continuously away from the fixed base 1 under the action of the telescopic mechanism 3, the first stop piece 22 on the push rod 21 is just clamped with the second stop piece 51, and the pushing platform 2 is limited at the storage position at the moment.

Meanwhile, the moving part is restored to the initial position under the action of the resetting piece, the moving part can be switched between the initial position and the ending position, and the stroke of the moving part moving from the initial position to the ending position is the effective moving stroke of the moving part. As shown in fig. 3 and 6, at this time, the moving portion (e.g., the rack 41) is at the end position, the reset member is in a compressed state, and the distance between the pressing portion (e.g., the rack pressing table 411) and the fixed base 1 is the shortest; as shown in fig. 4 and 7, when the moving portion (e.g., the rack 41) is at the initial position, the reset member is in the extended state, and the pressing portion (e.g., the rack pushes the table top 411) is farthest away from the fixed base 1. The reset piece can be reset by using elastic force, for example, a spring is connected with the moving part, and the moving part is moved back and forth by using the elastic force of the spring. In addition, the reset piece can also be reset by magnetic force, for example, a magnetic pole is arranged on the moving part, the same magnetic pole is also arranged on the moving track of the moving part, a repulsive force is generated to maintain the moving part at the initial position, and when the moving part is pressed, the moving part overcomes the repulsive force of the magnetic pole to move.

On the rotation trajectory of the second stopper 51, the rest positions except the position of the second stopper 51 can be regarded as neutral positions. When the push table 2 is pushed again, the power is transmitted to the rotation stopper 5 step by step, the rotation stopper 5 rotates to make the second stopper 51 away from the position where the first stopper 22 can be engaged, and the push table 2 is released again, and the second stopper 51 is disengaged from the first stopper 22, so that the push table 2 moves to the use position under the extension action of the telescopic mechanism 3. Along with the intersection of the reciprocating movement track of the pushing table 2 and the rotation track of the second stop member 51, the first stop member 22 can be engaged with or disengaged from the second stop member 51 by adjusting the relationship between the reciprocating displacement of the pushing table 2 and the rotation angle of the second stop member 51, that is, when the pushing table 2 reciprocates for the first time, the first stop member 22 is engaged with the second stop member 51, and the pushing table 2 is limited at the accommodating position; and when the push platform 2 reciprocates next time, the first stop piece 22 is separated from the second stop piece 51, so that the push platform 2 can be restored to the use position. The rotation stopping portion 5 may be a rotary disc or a rotary rod, the number of the second stopping portions 51 may be one or more, the second stopping portions 51 may be cylindrical blocking shafts or stoppers, the first stopping portions 22 may be slots matched with the blocking shafts or stoppers, of course, the first stopping portions 22 may be cylindrical blocking shafts or stoppers, the second stopping portions 51 may be slots matched with the blocking shafts or stoppers, and the first stopping portions 22 and the second stopping portions 51 may be engaged with each other as long as the first stopping portions 22 and the second stopping portions 51 are ensured to be engaged with each other.

The telescopic device provided by the embodiment comprises a fixed base, a pushing table, a telescopic mechanism, a transmission mechanism and a rotation stopping part, wherein the pushing table is driven by the telescopic mechanism to be close to or far away from the fixed base in a reciprocating manner so as to be switched between a storage position and a use position; the transmission mechanism comprises a moving part and a rotating part matched with the moving part, the moving part is pushed and pressed to move by the push rod, and then the rotating part rotates along with the movement of the moving part; the rotation stopping part is connected with the rotation part, and the second stopping part constructed on the rotation stopping part is driven by the rotation part to rotate and is clamped or separated from the first stopping part on the push rod. When the user bulldozes for the first time and pushes away and press the platform, and then when compressing telescopic machanism, it is close to unable adjustment base along with to push away to press the platform, the push rod pushes away and presses the splenium on the moving part, and then drive the moving part and remove to unable adjustment base, the rotating part rotates along with, and then the rotation backstop portion also rotates along with, the second backstop portion is rotatory to the position that can block first backstop portion, second backstop portion block in first backstop portion, push away this moment and press the platform and be in the position of accomodating, the user loosens at this moment and pushes away and presses the platform, it stops at the position of. When the user bulldozes the push platform once more, the removal portion removes to unable adjustment base once more, and rotation portion, rotation backstop portion and second stop part all rotate thereupon, and the second stop part has left the position that can block first stop part, if the user releases the push platform this moment, because the second stop part has left first stop part, therefore the push platform moves to the position of use under telescopic machanism's extension effect. The telescopic device well meets the lifting and accommodating requirements of household, automobile and office rooms on some electric appliances, tools and auxiliary articles, and has the characteristics of high reliability, low relative cost, no need of power supply, wide use environment and the like.

Further, as shown in fig. 3 to 7, the locking device further includes a one-way locking member, the rotating portion further includes a rotating body rotatably connected to the rotating shaft, the rotation stopping portion 5 is installed on the rotating shaft, and the one-way locking member is installed at a connection portion between the rotating body and the rotating shaft or at a connection portion between the rotation stopping portion 5 and the rotating shaft. Specifically, the unidirectional locking member may employ a unidirectional bearing 43, and the unidirectional bearing 43 is a bearing that is freely rotatable in one direction and locked in the other direction. The one-way bearing 43 is also called an overrunning clutch, such as a sprag one-way clutch, a roller one-way clutch, or the like. The inner ring of the one-way bearing 43 may be sleeved on the rotating shaft of the rotating part, and the outer ring of the bearing may be fixed on the rotating body or the rotating stop part 5.

In addition, the unidirectional locking piece can also adopt a ratchet mechanism, the ratchet mechanism comprises a ratchet wheel with ratchets on the periphery and a ratchet wheel sleeve with a pawl hinged to the inner side wall, the ratchet wheel sleeve is sleeved outside the ratchet wheel, the pawl is abutted to the ratchets, and the ratchets of the ratchet wheel are generally provided with unidirectional teeth. The ratchet wheel can be sleeved on the rotating shaft of the rotating part, and the ratchet wheel sleeve can be fixedly connected on the rotating body or the rotating stopping part 5. When the ratchet sleeve rotates anticlockwise, the driving pawl is inserted into the ratchet to push the ratchet to rotate in the same direction; when the ratchet sleeve rotates clockwise, the pawl slides on the ratchet wheel, and the ratchet wheel stops rotating.

Taking the unidirectional bearing 43 as an example for explaining the unidirectional locking member, when the unidirectional bearing 43 is installed between the rotating shaft and the rotating body, the bearing outer ring of the unidirectional bearing 43 is the driving member, the bearing inner ring is the driven member, and the rotation stopping portion 5 can be fixedly connected to the rotating shaft by taking the counterclockwise rotation as the engaged state and the clockwise rotation as the disengaged state. When the push rod 21 pushes the moving part to move downwards, the rotating body which is connected with the moving part in a matching way rotates anticlockwise, at the moment, the one-way bearing 43 is jointed, the bearing inner ring of the one-way bearing 43 follows, and the rotating shaft drives the rotating stopping part 5 to rotate anticlockwise together; when the push rod 21 drives the moving part to move upwards, the rotating body rotates clockwise, the one-way bearing 43 is separated, the rotating body and the bearing outer ring idle, the bearing inner ring does not rotate, and further the rotating shaft and the second stop part 51 do not rotate, so that the second stop part 51 can be ensured to rotate along one direction all the time, and the reciprocating rotation condition does not exist.

When the one-way bearing 43 is installed between the rotation stopping portion 5 and the rotating shaft, the bearing inner ring of the one-way bearing 43 is a driving member, the bearing outer ring is a driven member, the counterclockwise rotation is an engaged state, and the clockwise rotation is a disengaged state, and the rotating body can be fixedly connected to the rotating shaft. When the push rod 21 pushes the moving part to move downwards, the rotating body drives the rotating shaft to rotate anticlockwise, the one-way bearing 43 is engaged, the bearing outer ring of the one-way bearing 43 follows, and the rotating shaft drives the rotating stopping part 5 to rotate anticlockwise; when the push rod 21 drives the moving part to move upwards, the rotating body drives the rotating shaft to rotate clockwise, the one-way bearing 43 is separated at the moment, the rotating body, the rotating shaft and the bearing inner ring idle, the bearing outer ring does not rotate, and further the second stop part 51 does not rotate, so that the second stop part 51 can be ensured to rotate along one direction all the time, and the reciprocating rotation condition does not exist.

In this embodiment, the rotating body may be the gear 42, or may be a worm gear or other rotating member.

Further, the moving part is a rack 41, the rotating body is a gear 42 engaged with the rack 41, and the length direction of the rack 41 is parallel to the extending and retracting direction of the extending and retracting mechanism 3. Specifically, taking the extending and retracting direction of the extending and retracting mechanism 3 as the up-down direction as an example, the fixed base 1 and the pushing and pressing table 2 are horizontally arranged, and the rack 41 is vertically arranged.

As shown in fig. 3, when the pushing table 2 is pushed downward and abuts against the rack 41, the rack 41 moves downward along with the pushing table 2, the gear 42 rotates counterclockwise, and the gear 42 drives the second stopper 51 to rotate counterclockwise through the one-way locking member (the one-way bearing 43 may be used). When the rack 41 is moved to the limit position, the rack is stopped, the gear 42 and the second stop member 51 are also stopped, at this time, the second stop member 51 rotates to the connection position, at this time, the second stop member 51 is positioned on the reciprocating track of the first stop member 22, and when the first stop member 22 passes through the connection position, the second stop member 51 can be clamped.

As shown in fig. 4 and 5, after the external force is released, the telescoping mechanism 3 rebounds and stretches to drive the pushing platform 2 to move upwards, the rack 41 moves upwards together with the rebounding and stretching of the reset piece, the gear 42 rotates clockwise, and the second stop member 51 is kept unchanged in the connection position due to the non-return effect of the one-way locking member, that is, the rotation is not transmitted during the reverse rotation, so that the second stop member 51 can be clamped with the first stop member 22 to prevent the pushing platform 2 from moving upwards continuously.

As shown in fig. 6, when the pushing stage 2 is pushed down again and abuts the rack 41, the rack 41 moves down again together with the pushing stage 2, and the gear 42 and the second stopper 51 rotate counterclockwise again. When the rack 41 stops when moving to the limit position, the gear 42 and the second stopper 51 stop, and the second stopper 51 rotates to the neutral position, and the second stopper 51 moves away from the track of the first stopper 22 in a reciprocating manner, and the first stopper 22 does not engage with the second stopper 51 when passing through the neutral position, that is, the first stopper 22 is still disengaged from the second stopper 51 when passing through the neutral position.

As shown in fig. 7, after the external force is released again, the retractable mechanism 3 rebounds and extends to drive the pushing platform 2 to move upwards, the rack 41 moves upwards again under the rebounding and extending of the reset piece, the gear 42 rotates clockwise again along with the rack, and due to the non-return effect of the one-way locking piece, the second stop piece 51 is kept unchanged at the neutral position, so that the second stop piece 51 cannot be connected with the first stop piece 22, the pushing platform 2 continuously moves upwards under the driving of the retractable mechanism 3 until the retractable mechanism 3 returns to the initial state, and the pushing platform 2 is finally located at the use position.

In addition, the extending and retracting direction of the extending and retracting mechanism 3 can also be selected according to actual requirements, such as a horizontal direction or an inclined direction, and is not limited herein. The transmission assembly can also adopt a worm and gear transmission structure, wherein the moving part adopts a worm, the rotating part adopts a worm gear, the worm is rotatably connected with the pressing part through a bearing, when the pressing part moves towards the fixing base 1, the worm is driven to move downwards, the worm and the worm gear are meshed with each other at the moment, the worm gear rotates, and the worm rotates while moving downwards.

Further, as shown in fig. 3 to 7, the restoring member is an elastic restoring member 44, one end of the elastic restoring member 44 is connected to the rack 41, and the other end of the elastic restoring member 44 is connected to the stationary base 1, where the connection means fixed connection, detachable connection, or abutting connection. The telescopic direction of the elastic restoring piece 44 is parallel to the telescopic direction of the telescopic mechanism 3.

Furthermore, as shown in fig. 3 to 7, the elastic reset element 44 includes a sliding rod 441 and a reset spring 442 sleeved outside the sliding rod 441, a first blocking plate 443 connected to the moving portion is disposed at the upper end of the sliding rod 441, the first blocking plate 443 is located between the pushing platform 2 and the fixed base 1, the lower end of the sliding rod 441 passes through the fixed base 1 and is provided with a second blocking plate 444, and the second blocking plate 444 is located at a side of the fixed base 1 away from the first blocking plate 443 to limit the movement of the sliding rod 441; the return spring 442 is installed between the first blocking plate 443 and the stationary base 1. The upper end of the return spring 442 abuts against the first stopper 443, and the lower end of the return spring 442 abuts against the side of the stationary base 1 toward the pushing stage 2.

Specifically, when the moving portion (rack 41) moves downward, the first stopper 443 presses the return spring 442, the return spring 442 accumulates elastic potential energy, and the slide rod 441 extends out of the stationary base 1; when the external force is released, the return spring 442 releases the elastic potential energy and extends, and the sliding rod 441 drives the second blocking plate 444 to move upwards until the second blocking plate 444 contacts the fixed base 1.

In addition, the elastic restoring member 44 may also directly adopt a restoring spring 442, an upper end of the restoring spring 442 is directly connected to the moving portion, and a lower end of the restoring spring 442 is connected to the stationary base 1.

Further, the slide bar 441 is further provided with a stopper plate 445, and the stopper plate 445 is located between the first stopper 443 and the second stopper 444 and on a side of the stationary base 1 facing the pushing table 2 to limit a moving stroke of the moving portion. As shown in fig. 3 and 6, when the rack 41 moves downward, the maximum distance that the slide bar 441 moves downward (i.e., the effective moving length of the rack 41, i.e., the maximum distance that the rack 41 can move downward) is equal to the distance between the stopper plate 445 and the second stopper 444, and thus the effective moving length of the rack 41 can be adjusted by adjusting the distance between the stopper plate 445 and the second stopper 444.

Further, the axis of the gear 42 intersects the axis of the push rod 21. When the axis of the gear 42 intersects with the axis of the push rod 21, and the first stopper 22 is engaged with the second stopper 51, the force receiving direction of the first stopper 22 and the second stopper 51 is exactly the same as the telescopic direction, and the force is most stably received at this time. At this time, the upper end of the rack 41 extends in the horizontal direction toward one side of the gear 42 to a rack pressing land 411 for receiving the pressing force of the push rod 21. In addition, the axis of the push rod 21 may be offset from the axis of the gear 42.

Further, the plurality of second stoppers 51 are spaced apart from each other in the circumferential direction of the rotation stopper 5 (a dial may be used), that is, the space between two adjacent second stoppers 51 is used as a neutral position. When the moving part moves for a preset stroke, the rotating part rotates for a preset angle. The preset stroke here indicates an effective moving stroke of the moving portion, that is, a maximum distance that the moving portion can move after being pressed. In practice, the rotation angle and the number of stops need to be determined according to the space, the size of the rack 41 and the effective movement stroke. For example, in the present embodiment, the rotation angle is 45 ° according to the space, the size of the rack 41 and the effective moving stroke, and thus the number of the second stoppers 51 is four, that is, the included angle between two adjacent second stoppers 51 is 90 °. Each time the push table 2 is pushed to switch the push table 2 between the storage position and the use position, the second stopper 51 rotates by 45 °, and therefore the second stopper 51 engages with or disengages from the first stopper 22, and the gap is maintained. In addition, the number of the second stoppers 51 may be other numbers, and when the second stoppers 51 are uniformly spaced in the rotation circumferential direction of the rotation stopper 5, the product of the angle by which the rotating portion rotates as the moving portion moves by the preset stroke and the number of the second stoppers 51 is equal to 180 °.

Further, as shown in fig. 5, the telescoping mechanism 3 includes a supporting spring 31, an upper end of the supporting spring 31 is connected to a side of the pushing table 2 facing the fixed base 1, and a lower end of the supporting spring 31 is connected to a side of the fixed base 1 facing the pushing table 2. The supporting spring 31 is continuously contracted and extended along with the continuous reciprocating translation of the pushing table 2 towards the fixed base 1.

Furthermore, as shown in fig. 5, the telescopic mechanism 3 further includes a damping assembly 32, the damping assembly 32 includes a guide tube 321 filled with damping oil 323 therein and a guide rod 322 having one end inserted into the guide tube 321, and the supporting spring 31 is sleeved outside the guide tube 321. The guide pipe 321 may be connected to a side of the pushing table 2 facing the fixing base 1, and an end of the guide rod 322 extending out of the guide pipe 321 is connected to a side of the fixing base 1 facing the pushing table 2. Furthermore, the connection direction may be reversed, that is, one end of the guide rod 322 extending out of the guide tube 321 is connected to the side of the pushing platform 2 facing the fixed base 1, and the guide tube 321 is connected to the side of the fixed base 1 facing the pushing platform 2. Due to the action of the guide rod 322 and the damping oil 323, after the external force is released, the pushing platform 2 together with the push rod 21 is slowly lifted up under the action of the supporting spring 31.

Furthermore, a first sleeve 6 is further arranged on one side of the fixed base 1 facing the pushing platform 2, and the axial direction of the first sleeve 6 is parallel to the telescopic direction of the telescopic mechanism 3. The telescoping mechanism 3, the transmission mechanism 4 and the rotation stopping portion 5 are all located in the first sleeve 6. The side of the pushing platform 2 facing the fixed base 1 is further provided with a second sleeve 7, and the second sleeve 7 is sleeved outside the first sleeve 6 and used for packaging the part between the pushing platform 2 and the fixed base 1.

The following is a detailed description of the operation of the telescopic device in this embodiment as a lifting device. At this time, the knock base 2 serves as an elevating base.

As shown in fig. 3, when the push table 2 is pressed, the push rod 21 moves downward, and when the push rod 21 is pressed to the rack push table 411, the rack 41 moves downward, and the gear 42 also rotates. When the limit plate 445 contacts the fixed base 1, the rack 41 stops moving, the gear 42 also stops rotating, in this process, the gear 42 drives the rotation stop portion 5 (i.e. the turntable) to rotate through the one-way bearing 43 (i.e. the one-way locking member), and the second stop portion 51 on the rotation stop portion 5 just rotates to the position right above the gear 42.

As shown in fig. 4 and 5, the hand pressing the pushing platform 2 is released, the pushing platform 2 and the push rod 21 are slowly lifted up under the action of the supporting spring 31 due to the action of the guide rod 322 and the damping oil 323, and the pushing platform 2 is quickly engaged with the second stop member 51 by the first stop member 22 at the bottom of the push rod 21, and the pushing platform 2 stops at the storage position (i.e. the lowest limit position where the plane of the pushing platform 2 needs to stay is maintained), at this time, the rack 41 is pushed up to the initial height state under the action of the return spring 442, but the gear 42 does not drive the rotation stop portion 5 to rotate due to the action of the one-way bearing.

As shown in fig. 6, if the pushing platform 2 is pressed again, the pushing platform 2 together with the push rod 21 pushes the rack 41 downward again, and drives the gear 42 and the rotation stopping portion 5 to rotate, when the rack 41 moves to the bottom, the middle neutral position of the two second stopping portions 51 rotates to just above the gear 42.

As shown in fig. 7, when the pressing hand is released again, the first stopper 22 at the bottom of the push rod 21 cannot be engaged with the second stopper 51 at the rotation stopper 5, and the push table 2 is gradually lifted up by the guide rod 322 and the damping oil 323 until the flange at the top of the guide rod 322 contacts the lower end cover of the guide pipe 321 (or the support spring 31 completely returns to the initial state), and the push table 2 is stopped at the use position (i.e., the highest limit position when the plane of the push table 2 needs to be put into use).

As can be seen from the above embodiments, the utility model provides a telescopic device, which comprises a fixed base, a pushing platform, a telescopic mechanism, a transmission mechanism and a rotation stopping portion, wherein the pushing platform is driven by the telescopic mechanism to reciprocally approach or keep away from the fixed base so as to switch between a storage position and a use position; the transmission mechanism comprises a moving part and a rotating part matched with the moving part, the moving part is pushed and pressed to move by the push rod, and then the rotating part rotates along with the movement of the moving part; the rotation stopping part is connected with the rotation part, and the second stopping part constructed on the rotation stopping part is driven by the rotation part to rotate and is clamped or separated from the first stopping part on the push rod. When the user bulldozes for the first time and pushes away and press the platform, and then when compressing telescopic machanism, push away and press the platform and be close to unable adjustment base along with, the push rod pushes away and presses the splenium on the moving part, and then drives the moving part and remove to unable adjustment base, the rotating part rotates along with, and then the rotation backstop portion also rotates along with, the second backstop portion is rotatory to the position that can block first backstop portion, then the user release pushes away and presses the platform, second backstop portion block in first backstop portion, push away at this moment and press the platform and be in the position of accomodating, the moving. When the user bulldozes the push platform once more, the removal portion removes to unable adjustment base once more, and rotation portion, rotation backstop portion and second stop part all rotate thereupon, and the second stop part has left the position that can block first stop part, then the user releases the push platform, because the second stop part has broken away from first stop part, therefore the push platform moves to the position of use under telescopic machanism's extension effect. The telescopic device well meets the lifting and accommodating requirements of household, automobile and office rooms on some electric appliances, tools and auxiliary articles, and has the characteristics of high reliability, low relative cost, no need of power supply, wide use environment and the like.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (10)

1. A telescopic device, characterized by comprising:

a fixed base;

the pushing platform is arranged opposite to the fixed base, a push rod is constructed on the surface, facing the fixed base, of the pushing platform, the push rod extends towards the fixed base, and a first stop piece is constructed at the end part of the push rod;

the telescopic mechanism is connected between the pushing platform and the fixed base and is used for driving the pushing platform to switch between a storage position and a use position;

the transmission mechanism comprises a moving part, a rotating part and a reset piece, wherein the moving part is provided with a pressing part for pushing and pressing the push rod; the rotating shaft of the rotating part is rotatably arranged on the fixed base, and the rotating part is matched with the moving part to rotate along with the movement of the moving part; the reset piece is used for resetting the moving part;

the rotation stopping part is connected with the rotation part, at least one second stopping part is constructed in the rotation circumferential direction of the rotation stopping part, and the second stopping part is driven by the rotation part to rotate and is clamped with the first stopping part at the storage position or separated from the first stopping part at the use position.

2. The telescopic device as claimed in claim 1, further comprising a one-way locking member, wherein the rotating portion further comprises a rotating body rotatably connected to the rotating shaft, the rotation stopping portion is mounted on the rotating shaft, and the one-way locking member is mounted at a connection position of the rotating body and the rotating shaft or a connection position of the rotation stopping portion and the rotating shaft.

3. The telescoping device of claim 2, wherein the return member is an elastic return member, one end of the elastic return member is connected to the moving portion, the other end of the elastic return member is connected to the fixed base, and the telescoping direction of the elastic return member is parallel to the telescoping direction of the telescoping mechanism.

4. The telescopic device according to claim 3, wherein the elastic reset member comprises a sliding rod and a reset spring sleeved on the sliding rod, a first baffle plate connected to the moving part is arranged at one end of the sliding rod, the first baffle plate is located between the pushing table and the fixed base, the other end of the sliding rod penetrates through the fixed base and is provided with a second baffle plate, and the second baffle plate is located on one side of the fixed base, which is far away from the first baffle plate; the return spring is installed between the first baffle and the fixed base.

5. The telescoping device as claimed in claim 4, wherein the slide bar is further provided with a limiting plate, and the limiting plate is located between the first baffle and the second baffle and on a side of the fixed base facing the pushing platform.

6. The telescopic device according to claim 2, wherein the moving part is a rack, the rotating body is a gear engaged with the rack, and the length direction of the rack is parallel to the telescopic direction of the telescopic mechanism.

7. The telescopic device according to claim 2, wherein the number of the second stoppers is plural, and the plural second stoppers are spaced apart from each other in a circumferential direction of the rotation stopper.

8. The telescoping device of claim 1, wherein a first sleeve is further disposed on a side of the fixed base facing the pushing table, an axial direction of the first sleeve is parallel to a telescoping direction of the telescoping mechanism, and the telescoping mechanism, the transmission mechanism and the rotation stop portion are all located in the first sleeve; one side of the pushing table, which faces the fixed base, is also provided with a second sleeve, and the second sleeve is sleeved on the first sleeve.

9. The telescopic device according to any one of claims 1 to 8, wherein the telescopic mechanism comprises a supporting spring, one end of the supporting spring abuts against one side of the pushing table facing the fixed base, and the other end of the supporting spring abuts against one side of the fixed base facing the pushing table.

10. The telescoping device of claim 9, wherein the telescoping mechanism further comprises a damping assembly, the damping assembly comprises a guide tube filled with damping oil therein and a guide rod having one end inserted into the guide tube, and the supporting spring is sleeved on the guide tube;

the guide pipe is connected to one side, facing the fixed base, of the pushing table, and one end, extending out of the guide pipe, of the guide rod is connected to one side, facing the pushing table, of the fixed base;

or

One end of the guide rod extending out of the guide pipe is connected to one side, facing the fixed base, of the pushing table, and the guide pipe is connected to one side, facing the pushing table, of the fixed base.

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