CN219242379U - Telescopic device and electronic equipment - Google Patents

Abstract

The utility model discloses a telescopic device and electronic equipment, wherein the telescopic device comprises a fixed part, a movable part, a plurality of permanent magnets and a plurality of electromagnets, the movable part is movably connected with the fixed part, and the movable part can extend or retract relative to the fixed part; along the moving direction of the movable part, the electromagnets are sequentially arranged and arranged on the fixed part at intervals, the permanent magnets are sequentially arranged and arranged at intervals at the positions of the movable part corresponding to the magnetic coverage areas of the electromagnets, at least one permanent magnet and the electromagnets are in a partially staggered state in space, and corresponding level signals are introduced to the electromagnets to control attraction or repulsion of the corresponding permanent magnets so as to drive the movable part to extend or retract relative to the fixed part. The technical scheme that this telescoping device and electronic equipment provided can make movable part accurately stretch out or retract relative to fixed part, and flexible speed is fast, and can realize long distance flexible control in less space.

Description

Telescopic device and electronic equipment

Technical Field

The present disclosure relates to telescopic driving devices, and particularly to a telescopic device and an electronic apparatus.

Background

With the development of the refinement and miniaturization of various devices, a device for realizing long-distance expansion control in a smaller space is required, so as to reduce application cooperation devices and improve the action speed, and realize convenient and accurate action amplitude. In the prior art, telescopic cylinders are generally used for realizing telescopic control, wherein the strength of the cylinders is controlled by the air pressure, and the telescopic cylinders have the characteristics of high strength and high speed, but the controllability of the telescopic cylinders is poor, and an air compression device is also required to be matched for use. In addition, the prior art can also adopt the telescopic control of the oil pressure cylinder or the telescopic pressure box for a long distance, and the oil pressure cylinder has enough large force but has slower speed. The telescopic size of the telescopic pressing box is limited by the deflection disc, so that the telescopic size is short, and the amplitude and the position are difficult to accurately control.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model aims to provide a telescopic device capable of realizing long-distance telescopic control in a smaller space.

The first aspect of the present utility model provides a telescopic device, which includes a fixed portion, a movable portion, a plurality of permanent magnets and a plurality of electromagnets, wherein the movable portion is movably connected with the fixed portion, and the movable portion can extend or retract relative to the fixed portion;

along the moving direction of the movable part, the electromagnets are sequentially arranged on the fixed part at intervals, the permanent magnets are sequentially arranged on the movable part at intervals corresponding to the positions of the magnetic coverage areas of the electromagnets, at least one permanent magnet and the electromagnets are in a partially staggered state in space, and corresponding level signals are introduced to the electromagnets to control attraction or repulsion of the corresponding permanent magnets so as to drive the movable part to extend or retract relative to the fixed part.

In some embodiments, along the moving direction of the moving part, each permanent magnet is uniformly arranged on the moving part, each electromagnet is uniformly arranged on the fixed part, the distance between two adjacent permanent magnets is a first distance, the distance between two adjacent electromagnets is a second distance, and the first distance is smaller than the second distance.

In some of these embodiments, the ratio of the first pitch to the second pitch is 1:2.

In some embodiments, the electromagnet and the permanent magnet are square bodies, and the length of the electromagnet is consistent with the length of the permanent magnet along the moving direction of the movable part.

In some of these embodiments, the electromagnet and the permanent magnet are both cylinders, and the radial length of the electromagnet is identical to the radial length of the permanent magnet.

In some of these embodiments, the electromagnet and the permanent magnet are spherical and the diameter of the electromagnet is identical to the diameter of the permanent magnet.

In some embodiments, the fixed portion is a hollow structure with an opening at one end, the movable portion is slidably disposed through the hollow structure of the fixed portion, each permanent magnet is disposed on an outer wall of the movable portion, each electromagnet is disposed on an inner wall of the fixed portion, and the permanent magnets are disposed opposite to the electromagnets and have a spacing distance.

In some embodiments, a row of permanent magnets arranged along the moving direction of the moving part forms a permanent magnet group, a row of electromagnets arranged along the moving direction of the moving part forms an electromagnet group, the permanent magnet group and the electromagnet group are provided with a plurality of groups, the permanent magnet group and the electromagnet group are arranged in one-to-one correspondence, the permanent magnet group is distributed along the outer peripheral wall of the moving part, and the electromagnet group is distributed along the inner peripheral wall of the fixed part.

In some embodiments, the permanent magnet groups and the electromagnet groups are each provided with three groups, and each permanent magnet group is uniformly arranged along the outer peripheral wall of the movable portion, and each electromagnet group is uniformly arranged along the inner peripheral wall of the fixed portion.

In some embodiments, the fixing portion includes a first ring body, a second ring body and a partition plate, the second ring body is sleeved outside the first ring body, a communication hole for communicating the second ring body is formed in the side wall of the first ring body, the partition plate is inserted into two opposite sides of the first ring body and the second ring body, the movable portion is slidably arranged in the first ring body in a penetrating manner, each permanent magnet is arranged on the outer wall of the movable portion corresponding to the communication hole, and each electromagnet is arranged on the inner wall of the second ring body corresponding to the communication hole.

In some embodiments, a guiding device is arranged between the fixed part and the movable part, and the movable part slides reciprocally along the guiding device relative to the fixed part.

In some embodiments, the guiding device comprises a guiding groove and a guiding column, the guiding groove is arranged on the inner wall of the fixed part, the guiding column is arranged on the outer wall of the movable part, and the movable part is slidably arranged in the guiding groove through the guiding column so as to slide back and forth relative to the fixed part; or, the guide groove is formed in the outer wall of the movable part, the guide post is arranged on the inner wall of the fixed part, and the movable part slides on the guide post through the guide groove so as to slide back and forth relative to the fixed part.

A second aspect of the present utility model provides an electronic device comprising a body and a telescopic device as described above, the body being connected to the fixed part or to the movable part.

Compared with the prior art, the utility model has the beneficial effects that:

the telescopic device is characterized in that the fixed part and the movable part movably matched with the fixed part are arranged, the plurality of electromagnets are arranged on the fixed part, the movable part is provided with the plurality of permanent magnets, at least one permanent magnet is in a partially staggered state with the electromagnets, and the corresponding permanent magnets are controlled to be attracted or repelled by introducing corresponding level signals to the electromagnets, so that the electromagnets are matched to form directional driving force to drive the permanent magnets to move so as to drive the movable part to stretch out or retract gradually relative to the fixed part, and therefore, the movable part can stretch out or retract by a preset distance accurately relative to the fixed part through the matched driving of the electromagnets and the permanent magnets, the telescopic speed is high, and the telescopic control of a long distance can be realized in a smaller space.

Drawings

FIG. 1 is a schematic view of a telescopic device according to an embodiment of the present utility model in a retracted state;

FIG. 2 is a schematic view of a structure in which a movable portion of a telescopic device according to an embodiment of the present utility model is in an extended state;

fig. 3 is a schematic structural view of a fixing portion of a telescopic device according to an embodiment of the present utility model;

fig. 4 is a schematic structural view of a movable portion of a telescopic device according to an embodiment of the present utility model;

FIG. 5 is a partially exploded view of the telescoping device of FIG. 2;

fig. 6 is a schematic diagram of the level signal when the fixed part moves relative to the movable part in embodiment 2.

In the figure:

100. a telescoping device;

1. a fixing part; 11. a first ring body; 111. a communication hole; 12. a second ring body; 13. a partition plate; 2. a movable part; 3. a permanent magnet group; 31. a permanent magnet; 4. an electromagnet group; 41. an electromagnet; 5. a guide device; 51. a guide groove; 52. and a guide post.

Detailed Description

The utility model will be further described with reference to the drawings and the detailed description, wherein it should be noted that, on the premise of no conflict, the embodiments or technical features described below can be arbitrarily combined to form new embodiments. Materials and equipment used in this example are commercially available, except as specifically noted. Examples of embodiments are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and are therefore not to be construed as limiting the present application. In the description of the present application, the meaning of "a plurality" is two or more, unless specifically stated otherwise.

In the description of the present application, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, or connected via an intermediary, or may be a connection between two elements or an interaction relationship between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

The terms first, second and the like in the description and in the claims of the present application and in the above-described figures, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be noted that, the telescopic device 100 provided in the embodiment of the present utility model may be applied to an electronic apparatus that needs to perform telescopic control instead of a conventional air cylinder, where the electronic apparatus may be, for example, an intelligent device, an intelligent robot, an adult device, a telescopic tool fixture, or other apparatuses involving extension and retraction, and is not limited in particular herein.

Example 1

The embodiment of the utility model provides a telescopic device 100, as shown in fig. 1 to 5, the telescopic device 100 includes a fixed portion 1, a movable portion 2, a plurality of permanent magnets 31 and a plurality of electromagnets 41, the movable portion 2 is movably connected with the fixed portion 1, and the movable portion 2 can extend or retract relative to the fixed portion 1.

Along the moving direction of the moving portion 2, the electromagnets 41 are sequentially arranged and spaced on one side of the fixed portion 1 near the moving portion 2, and the permanent magnets 31 are sequentially arranged and spaced on the position of the moving portion 2 corresponding to the magnetic coverage area of the electromagnets 41, at least one permanent magnet 31 and the electromagnets 41 are in a partially staggered state in space, wherein the partially staggered state of the permanent magnets 31 and the electromagnets 41 means that the coverage area and the staggered area of the permanent magnets 31 relative to the corresponding electromagnets 41 are unequal in space. In addition, the electromagnet 41 generates a corresponding magnetic force after the level signal is applied, and the permanent magnet 31 is disposed at a position where the movable portion 2 is located in the magnetic force coverage area of the electromagnet 41. A corresponding level signal is fed to each electromagnet 41 to control attraction or repulsion of the corresponding permanent magnet 31 so as to drive the movable part 2 to extend or retract relative to the fixed part 1. The distance, shape and number between the permanent magnets 31 and the electromagnets 4 can be freely set according to the requirement, and the driving force of the driving movable portion is increased as the number increases.

It can be appreciated that, through the corresponding positions of the electromagnets 41 and the permanent magnets 31, the electromagnets 41 are adapted to supply corresponding level signals to the electromagnets 41, and the electromagnets 41 cooperate to form directional driving force to drive the permanent magnets 31 to move so as to drive the movable portion 2 to extend or retract relative to the fixed portion 1. Wherein, by the corresponding positions of the electromagnets 41 and the permanent magnets 31, the following modes are adopted to introduce corresponding level signals to each electromagnet 41:

when the electromagnet 41 is positioned in front of the permanent magnet 31 along the moving direction of the moving part 2 and the projection of the electromagnet 41 covers more than 1/2 area of the permanent magnet 31, a high-level signal is introduced to the electromagnet 41 to attract the corresponding permanent magnet 31;

when the electromagnet 41 is positioned behind the permanent magnet 31 in the moving direction of the moving part 2 and the projection of the electromagnet 41 covers more than 1/2 area of the permanent magnet 31, a low-level signal is fed to the electromagnet 41 to repel the corresponding permanent magnet 31;

in the moving direction of the moving part 2, when the projection of the electromagnet 41 covers approximately 1/2 area of the permanent magnet 31 or both overlap, the electromagnet 41 does not pass the level signal.

Therefore, by the cooperation of all the electromagnets 41, the repulsive force or attractive force is formed on the permanent magnet 31 at the adaptive position or the driving force is not formed, and the directional driving force can be formed to drive the permanent magnet 31 to drive the movable part 2 to extend or retract relative to the fixed part 1.

In summary, the telescopic device 100 is provided with the fixed portion 1 and the movable portion 2 movably matched with the fixed portion 1, and the fixed portion 1 is provided with the plurality of electromagnets 41, the movable portion 2 is provided with the plurality of permanent magnets 31, at least one permanent magnet 31 is in a partially staggered state with the electromagnets 41, and the electromagnets 41 are led with corresponding level signals to control attraction or repulsion of the corresponding permanent magnets 31, so that the electromagnets 41 can be matched to form directional driving force to drive the permanent magnets 31 to move so as to drive the movable portion 2 to gradually extend or gradually retract relative to the fixed portion 1, therefore, the movable portion 2 can be accurately extended or retracted relative to the fixed portion 1 by a preset distance through the matched driving of the electromagnets 41 and the permanent magnets 31, the telescopic speed is high, the telescopic size ratio can reach more than 70%, and the telescopic control of a long distance can be realized in a smaller space.

In some embodiments, as shown in fig. 3 to 5, each permanent magnet 31 is uniformly arranged on the movable portion 2 along the moving direction of the movable portion 2, each electromagnet 41 is uniformly arranged on the fixed portion 1, the interval between two adjacent permanent magnets 31 is a first interval, the interval between two adjacent electromagnets 41 is a second interval, and the first interval is smaller than the second interval. Wherein, the first distance between the adjacent two permanent magnets 31 is the distance of each step of displacement of the movable portion 2, for example, when the first distance between the adjacent two permanent magnets 31 is 1mm, the distance between the adjacent two electromagnets 41 is greater than 1mm, such as 2mm, 4mm,6mm, etc., the distance of each step of displacement of the movable portion 2 is 2mm, and the distance is gradually extended to the longest limit size or shortened to the shortest limit size by the multi-step displacement of the movable portion 2. The first interval is smaller than the second interval, so that the electromagnets 41 can be matched to effectively drive the permanent magnet 31 to drive the movable part 2 to gradually extend or gradually retract relative to the fixed part 1.

In some embodiments, the ratio of the first pitch to the second pitch is 1:2. In this embodiment, particularly, when the distance of each step of displacement of the movable portion 2 is required to be 2mm, the first interval is set to be 2mm, and the second interval is set to be 4mm; when the distance of each step of displacement of the movable part 2 is required to be 1mm, setting the first interval to be 1mm and the second interval to be 2mm; when the distance of each step of displacement of the movable part 2 is required to be 3mm, the first distance is set to be 3mm, the second distance is set to be 6mm, and the like, the distance of the corresponding first distance and second distance can be set according to the movement requirement of the movable part 2.

In some embodiments, as shown in fig. 3 and 4, the electromagnet 41 and the permanent magnet 31 are square, and the length of the electromagnet 41 is identical to the length of the permanent magnet 31 along the moving direction of the moving portion 2. In another embodiment, both the electromagnet 41 and the permanent magnet 31 are cylindrical, and the radial length of the electromagnet 41 coincides with the radial length of the permanent magnet 31. In yet another embodiment, both the electromagnet 41 and the permanent magnet 31 are spherical, and the diameter of the electromagnet 41 is identical to the diameter of the permanent magnet 31. Specifically, the shapes of the electromagnet 41 and the permanent magnet 31 include, but are not limited to, the shapes described above, and structures of other shapes may be adapted. It can be appreciated that by arranging the structure that the shapes of the electromagnet 41 and the permanent magnet 31 are consistent, the permanent magnet 31 can move regularly, so that the electromagnet 41 can be conveniently fed with corresponding level signals to form directional driving force according to the movement rule of the permanent magnet 31 relative to the electromagnet 41.

In some embodiments, as shown in fig. 3, the fixed portion 1 has a hollow structure with an opening at one end, the movable portion 2 is slidably disposed through the hollow structure of the fixed portion 1, each permanent magnet 31 is disposed on an outer wall of the movable portion 2, each electromagnet 41 is disposed on an inner wall of the fixed portion 1, and the permanent magnets 31 are disposed opposite to the electromagnets 41 with a space therebetween. As can be appreciated, the movable part 2 is movably inserted into the fixed part 1, so that the two parts form a built-in structure, the compactness of the structure is improved, the structural size is reduced, and the telescopic device 100 is more miniaturized; and through permanent magnet 31 and electro-magnet 41 set up respectively in the outer wall of movable part 2 and the inner wall of fixed part 1, the two relative settings and have the interval distance to make electro-magnet 41 can effectively drive permanent magnet 31 motion, avoid between the two by other structures blocking influence drive force.

In some embodiments, as shown in fig. 2 and 3, a row of permanent magnets 31 arranged along the moving direction of the moving portion 2 forms a permanent magnet group 3, a row of electromagnets 41 arranged along the moving direction of the moving portion 2 forms an electromagnet group 4, each of the permanent magnet group 3 and the electromagnet group 4 is provided with a plurality of groups, and the permanent magnet group 3 and the electromagnet group 4 are disposed in one-to-one correspondence, the permanent magnet group 3 is disposed along the outer peripheral wall of the moving portion 2 in a dispersed manner, and the electromagnet group 4 is disposed along the inner peripheral wall of the fixed portion 1 in a dispersed manner. It can be appreciated that by arranging the plurality of electromagnet groups 4 and the plurality of permanent magnet groups 3, the specific number of the groups can be specifically set according to the actually required driving force, and no particular limitation is imposed here, and the cooperation of the plurality of electromagnet groups 4 and the plurality of permanent magnet groups 3 can further increase the movement potential energy, thereby further improving the driving force of the movable portion 2 and enabling the movable portion 2 to be uniformly driven as a whole.

In particular, in the present embodiment, as shown in fig. 3 and 4, the permanent magnet groups 3 and the electromagnet groups 4 are each provided with three groups, and each permanent magnet group 3 is uniformly arranged along the outer peripheral wall of the movable portion 2, and each electromagnet group 4 is uniformly arranged along the inner peripheral wall of the fixed portion 1. The arrangement of three permanent magnet groups 3 and electromagnet groups 4 enables, on the one hand, a simple construction and, on the other hand, a sufficient and suitable kinetic potential energy to be provided.

In some embodiments, as shown in fig. 3, the fixing portion 1 includes a first ring body 11, a second ring body 12 and a partition plate 13, the second ring body 12 is sleeved outside the first ring body 11, a communication hole 111 for communicating with the second ring body 12 is formed in a side wall of the first ring body 11, the partition plate 13 is inserted into opposite sides of the first ring body 11 and the second ring body 12 located at the communication hole 111, the movable portion 2 is slidably inserted into the first ring body 11, each permanent magnet 31 is disposed on an outer wall of the movable portion 2 corresponding to the communication hole 111, and each electromagnet 41 is disposed on an inner wall of the second ring body 12 corresponding to the communication hole 111. It can be understood that, by arranging the first ring body 11 and the second ring body 12 which are sleeved, the movable portion 2 can reciprocate in the limited area of the first ring body 11, and by arranging the communication hole 111 on the first ring body 11, the permanent magnet 31 on the movable portion 2 can penetrate through the communication hole 111 so as to interact with the electromagnet 41 arranged on the inner wall of the second ring body 12, and the separation plates 13 are arranged on two sides of the communication hole 111, so that the electromagnet groups 4 in the same row and the permanent magnet groups 3 corresponding to the electromagnet groups are limited in the area separated by the two separation plates 13, on one hand, mutual interference with other electromagnet groups 4 and the permanent magnet groups 3 is avoided, and on the other hand, the magnetomotive force loss can be avoided as much as possible. The communication hole 111 extends in the axial direction of the first ring body 11, and corresponds to the moving direction of the movable portion 2, so that the permanent magnet 31 provided on the movable portion 2 can reciprocate along the communication hole 111.

In some embodiments, as shown in fig. 2, a guiding device 5 is disposed between the fixed part 1 and the movable part 2, and the movable part 2 slides reciprocally along the guiding device 5 with respect to the fixed part 1. Wherein the guiding device 5 can lead the movable part 2 to directionally and stably reciprocate in the fixed part 1, and can effectively avoid the influence of the position deviation of the movable part and the fixed part on the movement state.

In this embodiment, as shown in fig. 3 and 4, the guiding device 5 includes a guiding groove 51 and a guiding post 52, the guiding groove 51 is opened on the inner wall of the fixed portion 1, the guiding post 52 is disposed on the outer wall of the movable portion 2, and the movable portion 2 is slidably disposed in the guiding groove 51 through the guiding post 52 to reciprocally slide relative to the fixed portion 1; or, the guide groove 51 is formed on the outer wall of the movable portion 2, the guide post 52 is disposed on the inner wall of the fixed portion 1, and the movable portion 2 slides on the guide post 52 through the guide groove 51 to reciprocally slide relative to the fixed portion 1. The movable part 2 can linearly reciprocate relative to the fixed part 1 through the guiding cooperation of the guiding groove 51 and the guiding column 52, so that the influence of the position deviation of the movable part 2 and the fixed part on the movement state is effectively avoided. Of course, in other embodiments, the guide device 5 may be another member capable of guiding the movement of the movable portion 2, and is not particularly limited herein.

The utility model also provides an electronic device comprising a body and the telescopic device 100 as above, the body being connected to the fixed part 1 or to the movable part 2. The electronic device may be, for example, an intelligent device, an intelligent robot, an adult device, a telescopic fixture, or the like, which is not particularly limited herein. The electronic equipment can enable the movable part 2 to accurately move by a preset distance relative to the fixed part 1 by arranging the telescopic device 100, has high telescopic speed, can achieve the telescopic size ratio of more than 70%, and can realize long-distance telescopic control in a smaller space.

Example 2

The difference between the telescopic device 100 and the embodiment 1 is that 6 electromagnets 41 are arranged on the fixed portion 1, and are sequentially ordered into 1, 2, 3, 4, 5 and 6 along the extending direction of the movable portion 2; 7 permanent magnets 31 are arranged on the movable part 2, and are sequentially ordered as A, B, C, D, E, F, G along the extending direction of the movable part 2. The distance between each two adjacent permanent magnets 31 is 2mm, the distance between each two adjacent electromagnets 41 is 4mm, the permanent magnets 31 and the electromagnets 41 are identical in shape and are rectangular, and the width along the extending direction of the movable portion 2 is 10mm. ABCDEFG is respectively distributed in the same polarity, and the permanent magnet 31 can be wholly displaced by giving appropriate level signals to the 1-6 electromagnets 41.

The following is a summary of the movement of the telescopic device 100 of this embodiment, as shown in fig. 6:

the electric drive at 2mm per step is as follows:

the first step extends 2mm (wherein 1-6 numbers represent electromagnets 41 arranged in sequence, a-G represent permanent magnets 31 arranged in sequence, and the numbers in the following motion descriptions are the same):

the 1 high level attraction B, the 2 high level attraction C, the 3 non-driving, the 4 low level repulsion F, the 5 low level repulsion G, the 6 non-driving.

And 2mm extension:

1 non-driving, 2 high level attraction C, 3 high level attraction D, 4 high level attraction E, 5 non-driving, 6 high level attraction G.

And thirdly, stretching out for 2 mm:

1 low level repulsion B, 2 not driving, 3 high level attraction D, 4 high level attraction E, 5 not driving, 6 high level attraction G.

Fourth step, 2mm stretching:

1 low level repulsion B, 2 low level repulsion C, 3 not driving, 4 high level attraction E, 5 high level attraction F, 6 high level attraction G.

Fifth step, 2mm is extended:

1 not driving, 2 low level repulsive C, 3 low level repulsive D, 4 not driving, 5 high level attractive F, 6 high level attractive G.

Sixth step, 2mm is extended:

1 high attraction a, 2 not driven, 3 low repulsion D, 4 low repulsion E, 5 not driven, 6 high attraction G.

Seventh step, 2mm is extended:

the 1 high level attraction a, the 2 high level attraction B, the 3 non-driving, the 4 low level repulsion E, the 5 low level repulsion F, the 6 non-driving.

Eighth step, 2mm is extended:

1 not driving, 2 high level attraction B, 3 high level attraction C, 4 not driving, 5 low level repulsion F, 6 low level repulsion G.

Ninth step 2mm extension:

1 low level repulsion a, 2 not driving, 3 high level attraction C, 4 high level attraction D, 5 not driving, 6 low level repulsion G.

Tenth step, 2mm is extended:

the 1 low level repulsion a, 2 low level repulsion B, 3 not driving, 4 high level attraction D, 5 high level attraction E, 6 not driving.

Eleventh step 2mm extension:

1 low level rejection a, 2 low level rejection B, 3 low level rejection C, 4 not driven, 5 high level attraction E, 6 high level attraction F.

Twelfth step 2mm extension:

1 low level rejection a, 2 not driven, 3 low level rejection C, 4 low level rejection D, 5 not driven, 6 high level attraction F.

Thirteenth step 2mm extension:

1 not driven, 2 high level attraction a, 3 not driven, 4 low level repulsion D, 5 low level repulsion E, 6 not driven.

Fourteenth step 2mm extension:

1 not driving, 2 high level attraction a, 3 high level attraction B, 4 not driving, 5 low level repulsion E, 6 low level repulsion F.

Fifteenth step 2mm extension:

1 not driven, 2 not driven, 3 high level attraction B, 4 high level attraction C, 5 not driven, 6 low level repulsion F.

Sixteenth step 2mm extension:

1 not driving, 2 low level repulsive a, 3 not driving, 4 high level attractive C, 5 high level attractive D, 6 not driving.

Seventeenth step 2mm extension:

1 not driving, 2 low level rejection a, 3 low level rejection B, 4 not driving, 5 high level attraction D, 6 high level attraction E.

Eighteenth step 2mm is extended:

1 not driven, 2 low level rejection a, 3 low level rejection B, 4 low level rejection C, 5 not driven, 6 high level attraction E.

Nineteenth step 2mm extension:

1 not driven, 2 low level rejection a, 3 not driven, 4 low level rejection C, 5 low level rejection D, 6 not driven.

Twentieth step 2mm extension:

1 not driven, 2 not driven, 3 high level attraction a, 4 not driven, 5 low level repulsion D, 6 low level repulsion E.

Twenty-first step 2mm extension:

1 not driven, 2 not driven, 3 high level attraction a, 4 high level attraction B, 5 not driven, 6, low level repulsion E.

The circulation driving in the above way, 2mm each step of movement can be prolonged from 103mm to 179mm of original total length; elongation reaches 73.8 percent (76 mm)

Retracting: the driving signal is reversely driven.

The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.

Claims (10)

1. The telescopic device is characterized by comprising a fixed part, a movable part, a plurality of electromagnets and a plurality of permanent magnets, wherein the movable part is movably connected with the fixed part, and the movable part can extend or retract relative to the fixed part;

along the moving direction of the movable part, the electromagnets are sequentially arranged on the fixed part at intervals, the permanent magnets are sequentially arranged on the movable part at intervals corresponding to the positions of the magnetic coverage areas of the electromagnets, at least one permanent magnet and the electromagnets are in a partially staggered state in space, and corresponding level signals are introduced to the electromagnets to control attraction or repulsion of the corresponding permanent magnets so as to drive the movable part to extend or retract relative to the fixed part.

2. The telescopic device according to claim 1, wherein each permanent magnet is uniformly arranged on the movable portion, each electromagnet is uniformly arranged on the fixed portion, a distance between two adjacent permanent magnets is a first distance, a distance between two adjacent electromagnets is a second distance, and the first distance is smaller than the second distance.

3. The telescoping device of claim 2, wherein the ratio of the first spacing to the second spacing is 1:2.

4. The telescopic device according to claim 2, wherein the electromagnet and the permanent magnet are square bodies, and the length of the electromagnet is identical to the length of the permanent magnet along the moving direction of the movable portion.

5. The telescopic device according to any one of claims 1 to 4, wherein the fixed portion has a hollow structure with one end open, the movable portion is slidably disposed through the hollow structure of the fixed portion, each permanent magnet is disposed on an outer wall of the movable portion, each electromagnet is disposed on an inner wall of the fixed portion, and the permanent magnets are disposed opposite to the electromagnets with a space therebetween.

6. The telescopic device according to claim 5, wherein a guiding device is provided between the fixed portion and the movable portion, and the movable portion slides reciprocally along the guiding device with respect to the fixed portion.

7. The telescopic device according to claim 6, wherein the guiding device comprises a guiding groove and a guiding column, the guiding groove is arranged on the inner wall of the fixed part, the guiding column is arranged on the outer wall of the movable part, and the movable part is slidably arranged in the guiding groove through the guiding column so as to slide back and forth relative to the fixed part; or, the guide groove is formed in the outer wall of the movable part, the guide post is arranged on the inner wall of the fixed part, and the movable part slides on the guide post through the guide groove so as to slide back and forth relative to the fixed part.

8. The telescopic device according to claim 5, wherein a row of the permanent magnets arranged in the moving direction of the moving portion forms a permanent magnet group, a row of the electromagnets arranged in the moving direction of the moving portion forms an electromagnet group, the permanent magnet group and the electromagnet group are provided with a plurality of groups, the permanent magnet group and the electromagnet group are arranged in one-to-one correspondence, the permanent magnet group is distributed along the outer peripheral wall of the moving portion, and the electromagnet group is distributed along the inner peripheral wall of the fixed portion.

9. The telescopic device according to claim 5, wherein the fixing portion comprises a first ring body, a second ring body and a partition plate, the second ring body is sleeved outside the first ring body, a communication hole for communicating the second ring body is formed in the side wall of the first ring body, the partition plate is inserted into two opposite sides of the communication hole, the movable portion is slidably arranged in the first ring body in a penetrating manner, each permanent magnet is arranged on the outer wall of the movable portion corresponding to the communication hole, and each electromagnet is arranged on the inner wall of the second ring body corresponding to the communication hole.

10. An electronic device comprising a body and a telescopic device according to any one of claims 1 to 8, the body being connected to the fixed part or to the movable part.

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