CN219330999U - Lifting device and anti-pinch lifting learning table - Google Patents

Abstract

The utility model discloses a lifter and a hand clamping prevention lifting learning table, which belong to the field of teaching supplies, wherein the lifter comprises a supporting tube, a screw rod, a machine shell and a motor; a connecting block is fixed in the supporting tube, and a threaded hole parallel to the supporting tube is formed in the connecting block; the screw is screwed in the threaded hole on the connecting block; the shell is provided with a through hole for the screw rod to pass through, one end of the screw rod penetrates into the shell through the through hole, and a stop structure for preventing the screw rod from axially moving is arranged between the shell and the screw rod; the motor is located outside the casing, and the output shaft of motor is rotatable with the lateral wall of casing and is connected, and the output shaft of motor is connected with the screw rod transmission. The anti-pinch lifting learning table comprises a fixed tabletop, a movable tabletop and a bracket; the movable tabletop is pivotally connected with the fixed tabletop through a pivot; the support is fixedly arranged at the bottom of the fixed tabletop, and a lifter is connected between the movable tabletop and the support. The lifter disclosed by the utility model is simple and compact in structure and can be used for quickly adjusting the pitching angle of the movable tabletop.

Description

Lifting device and anti-pinch lifting learning table

Technical Field

The utility model relates to the field of teaching supplies, in particular to a lifter and a hand clamping prevention lifting learning table.

Background

The desk is one of important school supplies, and can provide functions of writing, storing articles and the like. However, these basic functions are not yet able to meet the learning needs, for example, when the user sits straight, such as when the textbook is laid on a desk surface, the user needs to have as low a head as possible to clearly see the content of the textbook, which may cause discomfort to the neck of the user, and therefore at least part of the desk surface of the desk needs to have a function of adjusting the pitching angle, so as to adjust the tilting angle, so that the user can project the line of sight onto the textbook without having to have a low head greatly.

In the prior art, for example, a C-shaped lifting desk and chair disclosed in chinese patent publication No. CN217365012U only has a height adjusting function, and although the sight line can be raised to a certain extent by increasing the height of the desk top, the user's arm is difficult to operate the articles on the desk top, and the user needs to lift the arm higher.

For example, the chinese patent with the publication number CN216984067U discloses a desk for chinese teaching with liftable adjustment, wherein the inner table 7 can adjust the angle relative to the table frame 4 through the table adjusting mechanism 8, but the structure of the table adjusting mechanism 8 is too complex, and the angle change of the inner table 7 is realized by the pushing plate 805 extruding the sliding block 802, so that the clamping phenomenon easily occurs, and the adjustment of the inner table 7 is invalid or more laborious. In addition, the adjustment of the inner table 7 is completely dependent on manual operation, which is disadvantageous for use.

Disclosure of Invention

Aiming at the problem that at least part of desk boards of desks in the prior art cannot quickly and conveniently adjust pitching angles, the utility model aims to provide a lifter and a hand clamping prevention lifting learning desk.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

in a first aspect, the present utility model provides a lifter comprising:

the support tube is internally fixed with a connecting block, and the connecting block is provided with a threaded hole parallel to the support tube;

the screw rod is screwed into the threaded hole on the connecting block;

the shell is provided with a through hole for the screw rod to pass through, one end of the screw rod, which is positioned outside the supporting tube, penetrates into the shell through the through hole, and a stop structure for preventing the screw rod from axially moving is arranged between the shell and the screw rod;

the motor is positioned outside the shell, an output shaft of the motor is rotatably connected with the side wall of the shell, and the output shaft of the motor is in transmission connection with the screw on one side of the interior of the shell.

Preferably, the stop structure comprises a flange arranged on the outer wall of the screw and an annular groove arranged on the inner wall of the through hole, and the flange is in clearance fit with the annular groove.

Preferably, a main shaft is rotatably connected between two opposite side walls of the casing, an output shaft of the motor is fixedly connected with the main shaft, and the main shaft is in transmission connection with the screw.

Preferably, the main shaft is perpendicular to the screw rod, a driving bevel gear is fixedly arranged on the main shaft, and a driven bevel gear meshed with the driving bevel gear is fixedly arranged on the screw rod.

Preferably, the main shaft is hollow, and the output shaft of the motor is fixedly connected in the hollow structure of the main shaft through a key.

Preferably, the casing includes about the pass through the plane symmetry of through-hole axis distributes left half shell and right half shell, left side half shell with right side half shell passes through screw or bolt fixed connection, left side half shell and all be provided with on the right side half shell with the shaft hole of main shaft looks adaptation, the annular groove is including setting up respectively left side half shell with semicircle recess on the right side half shell.

In a second aspect, the present utility model provides a hand-pinch resistant lifting learning table comprising:

a fixed tabletop;

the movable tabletop is pivotally connected with the fixed tabletop through a pivot;

the bracket is fixedly arranged at the bottom of the fixed tabletop, and the lifter is connected between the movable tabletop and the bracket;

the table legs are fixedly connected to the support.

Preferably, the table leg comprises an upper section and a lower section which are in socket connection with each other, wherein the upper section is fixedly connected to the bracket; the two legs are symmetrically distributed, the two legs are respectively provided with a leg lifting mechanism, and the support or the fixed tabletop is provided with a lifting driving device for driving the two leg lifting mechanisms to synchronously move.

Preferably, the table leg lifting mechanism comprises a fixed shell, a driving screw and a driving shell, wherein the fixed shell is fixedly connected with the lower section of the table leg, the driving screw is screwed on the fixed shell in a threaded manner, the driving shell is fixedly connected with the upper section of the table leg, the driving screw is rotatably connected with the driving shell, the stopping structure is arranged between the driving screw and the driving shell, the driving shell is also rotatably connected with a driving shaft, and the driving shaft is mechanically connected with the driving screw;

the lifting driving device comprises a lifting motor and an intermediate shaft, two ends of the intermediate shaft are respectively connected with driving shafts in the table leg lifting mechanisms, the lifting motor is fixedly installed on the support, and the lifting motor is in transmission connection with the intermediate shaft.

Preferably, a notch matched with the movable desktop is formed in the fixed desktop, and the movable desktop is installed in the notch.

By adopting the technical scheme, the utility model has the beneficial effects that: the lifter provided by the embodiment is simple and compact in structure, when in use, after the lower end of the supporting tube is pivotally connected with the desk body and the motor is fixedly connected with the desk surface (such as a movable desktop) to be controlled, the screw rod can stretch and retract relative to the supporting tube along the axial direction of the screw rod through the rotation of the motor, so that the pitching angle of the movable desktop can be quickly and conveniently changed, and meanwhile, the pitching angle of the movable desktop can be kept fixed and unchanged, and is not easy to be interfered by external force; the learning desk provided by the utility model is safer and more reliable, and manual operation is avoided when the learning desk is used.

Drawings

FIG. 1 is a schematic view of a lifter according to an embodiment of the disclosure;

FIG. 2 is a front view of a lifter according to one embodiment of the disclosure;

FIG. 3 is a top view of a lifter according to one embodiment of the disclosure;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic view of a learning table according to the second embodiment;

FIG. 6 is a front view of a learning table disclosed in the second embodiment;

FIG. 7 is a rear view of a learning table disclosed in embodiment two;

FIG. 8 is a right side view of a learning table disclosed in the second embodiment;

fig. 9 is a schematic diagram showing connection between a supporting tube and a connecting sheet of the lifter in the second embodiment;

fig. 10 is a schematic connection diagram of the intermediate shaft and two leg lifting mechanisms in the second embodiment.

In the drawing, 1-supporting tube, 11-cylinder, 12-cylinder cover, 13-connecting block, 2-screw, 3-shell, 31-left half shell, 32-right half shell, main shaft, 34-driving bevel gear, 35-driven bevel gear, 4-stop structure, 5-motor, 6-fixed tabletop, 7-movable tabletop, 8-bracket, 81-front side plate, 82-left side plate, 83-right side plate, 84-middle side plate, 9-table leg, 91-upper section, 92-lower section, 93-table leg, 10-table leg lifting mechanism, 101-fixed shell, 102-driving screw, 103-driving shell, 104-driving shaft, 105-driving bevel gear A, 106-driven bevel gear A, 14-lifting motor, 15-middle shaft and 16-drawer.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings. The description of these embodiments is provided to assist understanding of the present utility model, but is not intended to limit the present utility model. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

It should be noted that, in the description of the present utility model, the positional or positional relation indicated by the terms such as "upper", "lower", "left", "right", "front", "rear", etc. are merely for convenience of describing the present utility model based on the description of the structure of the present utility model shown in the drawings, and are not intended to indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The terms "first" and "second" in this technical solution are merely references to the same or similar structures, or corresponding structures that perform similar functions, and are not an arrangement of the importance of these structures, nor are they ordered, or are they of a comparative size, or other meaning.

In addition, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., the connection may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two structures. It will be apparent to those skilled in the art that the specific meaning of the terms described above in this application may be understood in the light of the general inventive concept in connection with the present application.

Example 1

A lifter, as shown in fig. 1-4, comprises a support tube 1, a screw 2, a casing 3, a stop structure 4 and a motor 5.

The support tube 1 is configured in a cylindrical configuration with an oval cross section, or in other preferred embodiments may be cylindrical or square, etc. The support tube 1 includes a cylinder 11 having both ends (upper and lower ends) open, and a cylinder cover 12 for closing both upper and lower ends thereof, the cylinder cover 12 being fixed by screws. A step is arranged on one side of the interior of the upper end of the support tube 1, a connecting block 13 is arranged in the step, a threaded hole parallel to the support tube 1 is arranged on the connecting block 13, and the threaded hole is preferably arranged coaxially with the support tube 1.

The screw 2 is directly screwed into a threaded hole on the connecting block 13, and a through hole for the screw 2 to pass through is formed in a cylinder cover positioned at the upper end of the support tube 1, so that the upper end of the screw 2 can extend out of the support tube 1.

The casing 3 is configured in a shell-like structure, a through hole through which the screw 2 passes is formed in one side of the lower end of the casing 3, so that the upper end of the screw 2 located outside the support tube 1 can pass into the casing 3 through the through hole, and a stop structure 4 for preventing the screw 2 from axially moving is provided between the casing 3 and the screw 2. The motor 5 is located on the outer side of the casing 3, the output shaft of the motor 5 is rotatably connected with the side wall of the casing 3, and on the inner side of the casing 3, the output shaft of the motor 5 is in transmission connection with the screw 2.

In this embodiment, the configuration casing 3 includes a left half shell 31 and a right half shell 32 symmetrically distributed about a plane passing through the axis of the through hole, the left half shell 31 and the right half shell 32 are fixedly connected by a screw or a bolt, semicircular holes are respectively provided at opposite positions of lower ends of the left half shell 31 and the right half shell 32, and the two semicircular holes are butted to form the through hole. The left half shell 31 and the right half shell 32 are oppositely provided with shaft holes, so that a main shaft 33 is rotatably connected between the left half shell 31 and the right half shell 32, the main shaft 33 is perpendicular to the screw rod 2, a driving bevel gear 34 (preferably manufactured by integrally forming the two) is fixedly installed on the main shaft 33, a driven bevel gear 35 meshed with the driving bevel gear 34 is fixedly installed on the screw rod 2, and an output shaft of the motor 5 is fixedly connected with the main shaft 33, for example, the main shaft 33 is configured to be hollow (or at least has a blind hole at the end part), so that the output shaft of the motor 5 can be fixedly connected in the hollow structure of the main shaft 33 through a key, thereby realizing rotatable connection of the output shaft of the motor 5 relative to the casing 3.

In this embodiment, the arrangement stopper 4 includes a flange provided on the outer wall of the screw 2 and an annular groove provided on the inner wall of the through hole, and the flange is clearance-fitted with the annular groove so that the flange can only rotate in the annular groove without axial play. Wherein the flange is integrally formed on the screw 2. In other preferred embodiments, it is also possible to provide the flange on the inner wall of the through hole and the annular groove on the outer wall of the screw 2. It will be appreciated that the annular groove provided on the inner wall of the through hole comprises semicircular grooves respectively provided on the left half shell 31 and the right half shell 32, and the two semicircular grooves form the annular groove after being butted.

The working principle of the utility model is as follows:

when the lifter disclosed in the embodiment is used, the lifter is connected between the object a and the object B, for example, the lower end of the supporting tube 1 is connected with the object a, the motor 5 is connected with the object B, after the motor 5 is started, the motor 5 drives the main shaft 33 to rotate, and the main shaft 33 drives the screw rod 2 to rotate through the bevel gear transmission mechanism, so that the screw rod 2 performs telescopic motion in the supporting tube 1, and the object a is driven to move relative to the object B. It can be understood that when the object a and the object B are connected by a slide rail or a guide rail (the lower end of the supporting tube 1 is fixedly connected with the object a, and the motor 5 is fixedly connected with the object B), the lifter can be used for driving the object a and the object B to make relative linear motion; when the object a and the object B are rotatably connected through the pin shaft (the lower end of the supporting tube 1 needs to be pivotally connected with the object a, and the motor 5 is fixedly connected with the object B), the casing 3 can also rotate relative to the motor 5, so that the lifter can be used for driving the object a and the object B to perform relative rotation.

Example two

A learning desk capable of preventing hands from being clamped and lifted is shown in figures 5-8 and comprises a fixed tabletop 6, a movable tabletop 7, a bracket 8 and desk legs 9.

Wherein, the fixed tabletop 6 and the movable tabletop 7 are both in flat plate structures, and a gap adapted to the movable tabletop 7 is formed on the right side of the proximal end (proximal end refers to the end close to the user, and distal end refers to the end far away from the user) of the fixed tabletop 6, so that the proximal end of the movable tabletop 7 is pivotally connected with the proximal end of the gap through a pivot 71. And when the movable table top 7 rotates to a certain position, the top surface of the movable table top 7 can be flush with the top surface of the fixed table top 6, thereby filling up the notch of the fixed table top 6.

Wherein, support 8 fixed mounting is in the bottom of fixed desktop 6, and in this embodiment, support 8 includes preceding curb plate 81, left side board 82 and right side board 83, and wherein, preceding curb plate 81 fixed connection is at the bottom surface distal end of fixed desktop 6, and left side board 82 fixed connection is at the bottom surface left end of fixed desktop 6, and right side board 83 fixed connection is at the bottom surface right-hand member of fixed desktop 6. The two ends of the pivot 71 are rotatably connected to the pivot holes on the left side plate 82 and the right side plate 83, and the pivot 71 is fixedly connected to one side of the bottom surface of the movable table 7.

In this embodiment, a lifter disclosed in the first embodiment is connected between the movable table top 7 and the front side plate 81 of the bracket 8. Wherein, the lower end of the supporting tube 1 of the lifter is pivotally connected with the proximal side surface of the front side plate 81, for example, strip-shaped holes are formed on a cylinder cover at the lower end of the supporting tube 1 and on the side wall of the lower end of the supporting tube 1; the proximal side of the front side plate 81 is provided with a connecting sheet 85 by a screw, the lower end of the connecting sheet 85 is arc-shaped and curved, the end of the connecting sheet penetrates into the support tube 1 through a strip-shaped hole on the cylinder cover and then penetrates out through a strip-shaped hole on the side wall of the lower end of the support tube 1, so that the support tube 1 can rotate under the limit of the connecting sheet 85, and further the structural configuration of the pivotal connection of the lifter and the bracket 8 is realized, as shown in fig. 9. Wherein, the motor 5 is arranged on one side of the bottom surface of the movable table top 7 through screws when in use.

It can be appreciated that due to the arrangement of the lifter, after the angle adjustment of the movable table top 7 is completed, the relative position of the screw rod 2 and the supporting tube 1 can be kept fixed, so that the staggered bevel opening formed between the movable table top 7 and the fixed table top 6 can not cause mechanical injury to a user, and the situations such as clamping and the like can be effectively prevented.

The legs 9 are fixedly connected to the support 8, two legs 9 are symmetrically fixed to the left side plate 82 and the right side plate 83, respectively.

In this embodiment, the table leg 9 includes an upper section 91 and a lower section 92 that are connected to each other in a socket-spigot manner, the upper section 91 and the lower section 92 are each configured in a tubular shape, the cross section thereof is rectangular, the lower section 92 is inserted into the upper section 91, and the table leg 9 further includes a table leg 93 fixed to the bottom surface of the lower section 92. The legs 9 are each provided with a leg lifting mechanism 10, and the support 8 (specifically, the distal side surface of the front side plate 81) is provided with a lifting drive device for driving the leg lifting mechanisms 10 to move synchronously.

In this embodiment, the leg elevating mechanism 10 includes a fixed housing 101, a drive screw 102, and a drive housing 103. The fixed shell 101 is arranged in the lower section 92 of the table leg 9, the transmission screw 102 is screwed on the upper end of the fixed shell 101, and the transmission screw 102 can be screwed into the fixed shell 101; the transmission housing 103 is fixedly connected with the upper section 91 of the table leg 9, a hole for the transmission screw 102 to penetrate is formed at the lower end of the transmission housing 103, so that the upper end of the transmission screw 102 extends into the transmission housing 103 along the hole, and the stop structure 4 is also arranged between the transmission screw 102 and the transmission housing 103, so that the transmission screw 102 and the transmission housing 103 can only relatively rotate and cannot axially move; shaft holes are formed in two opposite side walls of the transmission housing 103, a driving shaft 104 is rotatably connected between the two shaft holes, a driving bevel gear A105 is fixed on the driving shaft 104, and a driven bevel gear A106 is mounted on the transmission screw 102, so that the driving shaft 104 is mechanically connected with the transmission screw 102 through a bevel gear transmission structure. Meanwhile, for easy disassembly, the transmission housing 103 is also configured in a two-half structure, and the two half shells are symmetrically distributed about a plane passing through the axis of the transmission screw 102.

The lifting drive comprises a lifting motor 14 and an intermediate shaft 15. The upper ends 91 of the two legs 9 are provided with through holes for the intermediate shaft 15 to penetrate, so that two ends of the intermediate shaft 15 are respectively connected with the driving shafts 104 in the two leg lifting mechanisms 10, for example, in the embodiment, the end surfaces of the driving shafts 104 are provided with non-circular blind holes (such as inner hexagonal holes), and the end parts of the intermediate shaft 15 are provided with hexagonal structures matched with the inner hexagonal holes, so that the driving shafts 104 in the two leg lifting mechanisms 10 are simultaneously driven to rotate through the intermediate shaft 15. The lifting motor 14 is fixedly mounted on the front side plate 81 in the bracket 8, and the lifting motor 14 is connected with the intermediate shaft 15 through gear transmission or synchronous pulley transmission and the like.

It can be seen that the structure of the leg elevating mechanism 10 disclosed in this embodiment is substantially the same as that of the lifter disclosed in the first embodiment (excluding the size and shape), except that the leg elevating mechanism 10 does not include the motor 5. In addition, considering that the driving screws 102 in the two leg lifting mechanisms 10 need to rotate in the same direction (so as to facilitate that the two driving screws 102 extend into the fixed housing 101 or extend out of the fixed housing 101 at the same time), the two ends of the driving shaft 104 are configured to have the above-mentioned inner hexagonal holes, so that the installation direction of the driving housing 103 can be changed by 180 ° to ensure that after the intermediate shaft 15 drives the two driving shafts 104 to rotate in the same direction, the two driving screws 102 can also rotate in the same direction under the action of the bevel gear transmission mechanism, as shown in fig. 10.

In addition, for convenient operation, four buttons are arranged at the left near end of the fixed tabletop 6 and are respectively used for controlling the lifting and the lowering of the movable tabletop 7 and the lifting and the lowering of the table legs 9; meanwhile, two controllers for controlling the motor to rotate positively and reversely are further arranged on the support 8 and are respectively and electrically connected with the motor 5 and the lifting motor 14, and each controller is respectively connected with two buttons.

In a preferred embodiment, the deployment bracket 8 further comprises a middle side plate 84, the middle side plate 84 being arranged on the right side of the left side plate 82, on the left side of the notch, and a drawer 16 being mounted between the left side plate 82 and the middle side plate 84 for the purpose of holding articles.

The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model, and yet fall within the scope of the utility model.

Claims (10)

1. A lifter, characterized in that: comprising the following steps:

the support tube is internally fixed with a connecting block, and the connecting block is provided with a threaded hole parallel to the support tube;

the screw rod is screwed into the threaded hole on the connecting block;

the shell is provided with a through hole for the screw rod to pass through, one end of the screw rod, which is positioned outside the supporting tube, penetrates into the shell through the through hole, and a stop structure for preventing the screw rod from axially moving is arranged between the shell and the screw rod;

the motor is positioned outside the shell, an output shaft of the motor is rotatably connected with the side wall of the shell, and the output shaft of the motor is in transmission connection with the screw on one side of the interior of the shell.

2. The lifter according to claim 1, characterized in that: the stop structure comprises a flange arranged on the outer wall of the screw rod and an annular groove arranged on the inner wall of the through hole, and the flange is in clearance fit with the annular groove.

3. The lifter according to claim 2, characterized in that: the motor is characterized in that a main shaft is rotatably connected between two opposite side walls of the shell, an output shaft of the motor is fixedly connected with the main shaft, and the main shaft is in transmission connection with the screw.

4. A lifter according to claim 3, characterized in that: the main shaft is perpendicular to the screw rod, a driving bevel gear is fixedly arranged on the main shaft, and a driven bevel gear meshed with the driving bevel gear is fixedly arranged on the screw rod.

5. The lifter according to claim 4, characterized in that: the main shaft is hollow, and the output shaft of the motor is fixedly connected in the hollow structure of the main shaft through a key.

6. A lifter according to claim 3, characterized in that: the casing includes about the pass through the plane symmetry of through-hole axis distributes's left half shell and right half shell, left side half shell with right half shell passes through screw or bolt fixed connection, left side half shell and all be provided with on the right half shell with the shaft hole of main shaft looks adaptation, the annular groove is including setting up respectively left side half shell with semicircle recess on the right half shell.

7. Prevent tong lift study table, its characterized in that: comprising the following steps:

a fixed tabletop;

the movable tabletop is pivotally connected with the fixed tabletop through a pivot;

the support is fixedly arranged at the bottom of the fixed tabletop, and the lifter as claimed in any one of claims 1-6 is connected between the movable tabletop and the support;

the table legs are fixedly connected to the support.

8. A learning desk as claimed in claim 7, wherein: the table leg comprises an upper section and a lower section which are in socket connection with each other, wherein the upper section is fixedly connected to the bracket; the two legs are symmetrically distributed, the two legs are respectively provided with a leg lifting mechanism, and the support or the fixed tabletop is provided with a lifting driving device for driving the two leg lifting mechanisms to synchronously move.

9. A learning desk as claimed in claim 8, wherein: the table leg lifting mechanism comprises a fixed shell, a transmission screw and a transmission shell, wherein the fixed shell is fixedly connected with the lower section of the table leg, the transmission screw is screwed on the fixed shell in a threaded manner, the transmission shell is fixedly connected with the upper section of the table leg, the transmission screw is rotatably connected with the transmission shell, the stop structure is arranged between the transmission screw and the transmission shell, the transmission shell is also rotatably connected with a driving shaft, and the driving shaft is mechanically connected with the transmission screw;

the lifting driving device comprises a lifting motor and an intermediate shaft, two ends of the intermediate shaft are respectively connected with driving shafts in the table leg lifting mechanisms, the lifting motor is fixedly installed on the support, and the lifting motor is in transmission connection with the intermediate shaft.

10. A learning desk as claimed in claim 7, wherein: the fixed tabletop is provided with a notch matched with the movable tabletop, and the movable tabletop is arranged in the notch.

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