WO2021213332A1

WO2021213332A1 - Magnetic attraction type extendable device and apparatus worn on head

Info

Publication number: WO2021213332A1
Application number: PCT/CN2021/088152
Authority: WO
Inventors: 朱达云
Original assignee: Zhu Dayun
Priority date: 2020-04-20
Filing date: 2021-04-19
Publication date: 2021-10-28
Also published as: CN111405410A

Abstract

Disclosed in the present invention is a magnetic attraction type extendable device. The magnetic attraction type extendable device comprises a housing, a sliding member and a magnetic attraction mechanism. The housing is internally formed with a cavity, and one end of the cavity is provided with an insertion port. The sliding member is provided with an insertion end and an extendable end, wherein the insertion end is inserted into the cavity by means of the insertion port and is slidably limited inside the cavity, and the extendable end extends out of the insertion port. The magnetic attraction mechanism comprises at least two first magnets and at least one second magnet, wherein the first magnets are arranged on the inner wall surface of the cavity and the second magnet is arranged on the side surface of the sliding member; or the first magnets are arranged on the side surface of the sliding member and the second magnet is arranged on the inner wall surface of the cavity; the first magnets are arranged in the moving direction of the sliding member; when the sliding member is stationary, the at least one second magnet and the at least one first magnet attract each other; and the sliding member slides, and the second magnet moves from one of the first magnets to the other of the first magnets, with same attracting one another. The magnetic attraction type extendable device has a simple structure and a small size. Further disclosed in the present invention is an apparatus worn on the head having the magnetic attraction type extendable device.

Description

Magnetically attractive telescopic device and head-mounted equipment

Technical field

The invention belongs to the technical field of head-mounted equipment, and in particular relates to a magnetically attracted telescopic device and head-mounted equipment.

Background technique

A head-mounted device is a device worn on the head, such as headphones, head-mounted hearing aids, head-mounted hearing aids, etc. It is composed of a headband and speaker modules arranged at both ends of the headband, so that the speaker modules can fit better The joints of the ears, the headband and the speaker module are generally provided with a telescopic adjustment device, which expands and contracts to adjust the position of the speaker module.

Chinese patent CN201821455405.4 discloses a telescopic structure of a headset, including a cover body and a telescopic assembly. The cover body includes an upper cover body and a lower cover body. The lower cover body is provided with a sliding groove. The assembly is slidably mounted in the sliding groove. The groove bottom of the sliding groove is provided with convex blocks at intervals, and a clamping position is formed between two adjacent convex blocks. It is fixedly installed above the telescopic part, the elastic piece includes a convex part, a buffer part and a hook part, the telescopic part is provided with a through groove and a mounting block, the convex part protrudes from the through groove, and the convex part is clamped In the holding position, the hook part is hooked to the mounting block, the upper surface of the buffer part abuts against the lower surface of the headband, and the telescopic member is provided with a limit hook. The disadvantages of the above telescopic structure are: 1. There are many parts and components, the structure is complicated, and it is not easy to process and manufacture; and the volume is large, which is not suitable for small-sized earphones; 2. The shrapnel is prone to deformation and failure, so that it cannot be adjusted for expansion.

Summary of the invention

The purpose of the present invention is to provide a magnetically attracting telescopic device and a head-mounted device, which aims to solve the technical problems of complex structure and large volume of the telescopic mechanism of the head-mounted device in the prior art.

In order to achieve the above objective, the present invention provides a magnetically attractive telescopic device, including:

A housing, a cavity is formed in the housing, and an insertion port is provided at one end of the cavity; and

A sliding member, the sliding member having an insertion end and a telescopic end, the insertion end is inserted into the cavity through the insertion port and slidably limited in the cavity; the telescopic end extends from the insertion port out;

The magnetic telescopic device also includes:

A magnetic attraction mechanism, the magnetic attraction mechanism includes at least two first magnetic attraction members and at least one second magnetic attraction member; both the first magnetic attraction member and the second magnetic attraction member are magnets or are respectively magnets And iron parts, both are magnetically adsorbed;

The first magnetic attraction member is arranged on the inner wall surface of the cavity and the second magnetic attraction member is arranged on the side surface of the sliding member;

Or the first magnetic attraction member is arranged on the side surface of the sliding member and the second magnetic attraction member is arranged on the inner wall surface of the cavity;

The first magnetic attraction members are arranged along the moving direction of the sliding member; when the sliding member is stationary, at least one first magnetic attraction member and at least one second magnetic attraction member attract each other; the sliding member slides, The second magnetic attraction member moves from one of the first magnetic attraction members to the other first magnetic attraction member and attracts each other.

Optionally, a plurality of the first magnetic attraction members are arranged on the inner wall surface of the cavity, and any two adjacent first magnetic attraction members are arranged with opposite polarities; two second magnetic attraction members The suction member is arranged on the side surface of the sliding member and adjacent to the insertion end, and the polarities of the two second magnetic suction members are opposite; when the sliding member is stationary, the two second magnetic suction members The two magnetic parts are attracted to the two first magnetic parts, the sliding part slides, and the two second magnetic parts move from the two first magnetic parts to the other two first magnetic parts. The magnetic parts are attached to each other and are respectively attracted to each other.

Optionally, a plurality of the first magnetic attraction members are arranged on the inner wall surface of the cavity; the magnetic poles of the plurality of first magnetic attraction members are arranged in the same way; and one of the second magnetic attraction members is arranged on the On the side of the sliding member and adjacent to the insertion end.

Optionally, a plurality of the first magnetic attraction members are arranged on the side surface of the sliding member, and one of the second magnetic attraction members is arranged on the inner wall surface of the cavity and is adjacent to the insertion port.

Optionally, an electric wire is inserted into the sliding member or integrally formed in the sliding member; the sliding member is provided with a first perforation arranged along its length, and the electric wire passes through the first perforation And pass through the sliding member.

Optionally, a rigid bar penetrates the sliding member or is integrally formed in the sliding member; the sliding member is provided with a second perforation arranged along its length; the rigid bar passes through the first Two perforations pass through the sliding member, and the end of the rigid strip is limited to the outlet of the second perforation.

Optionally, a wire compartment is formed between the insertion end and the back wall of the cavity, and a lead hole communicating with the wire compartment is also provided on the wall surface of the cavity.

Optionally, the sliding member is provided with a first limiting portion adjacent to the insertion end, and the sliding member is provided with a second limiting portion adjacent to the telescopic end; on the insertion port A third limiting portion is provided, and the sliding member is limited by the first limiting portion or the second limiting portion and the third limiting portion respectively.

Optionally, a guide groove is provided on one side wall or two opposite side walls of the cavity, and the sliding member matches the guide groove.

The present invention also provides a head-mounted device, including a headband, the headband has two mounting ends; the head-mounted device also includes the above-mentioned magnetic-attractive telescopic device, the two magnetic-attractive telescopic devices are respectively arranged on two The mounting end.

The above-mentioned one or more technical solutions in the magnetic telescopic device and the head-mounted device provided by the embodiments of the present invention have at least one of the following technical effects:

1. The magnetic telescopic device fixes the casing and the sliding member by magnetic attraction. When the sliding member is stationary, at least one second magnetic member and at least one first magnetic member attract each other; when the sliding member expands and contracts, the sliding member Sliding, the second magnetic member moves from one first magnetic member to another first magnetic member and attracts each other; the magnetically attracted telescopic device has a simple structure, small size, easy installation and manufacturing, and when pulled The hand feel is better and the noise is lower; the magnetic telescopic device using magnetic attraction has higher reliability, is not easy to be damaged, and has a longer service life;

2. The head-mounted device with the magnetic telescopic device is smaller, more portable, and has a longer service life.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are merely of the present invention. For some embodiments, for those of ordinary skill in the art, other drawings may be obtained based on these drawings without creative labor.

Fig. 1 is a schematic structural diagram of a retracted state of a magnetic telescopic device according to Embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of the extended state of the magnetostrictive device according to Embodiment 1 of the present invention.

3 is a cross-sectional view of the extended state of the magnetostrictive telescopic device according to Embodiment 1 of the present invention.

FIG. 4 is a schematic structural diagram of a head-mounted device provided by Embodiment 2 of the present invention.

Fig. 5 is a schematic structural diagram of the retracted state of the magnetically attractive retractable device provided in Embodiment 3 of the present invention.

Fig. 6 is a schematic structural diagram of the retracted state of the magnetic attraction type telescopic device provided in Embodiment 4 of the present invention.

Fig. 7 is a schematic structural diagram of the retracted state of the magnetic expansion device according to the fifth embodiment of the present invention.

Fig. 8 is a cross-sectional view of a magnetic telescopic device provided by Embodiment 6 of the present invention.

FIG. 9 is a schematic diagram of the structure of the insertion port provided in Embodiment 6 of the present invention.

Fig. 10 is a cross-sectional view of a magnetostrictive telescopic device provided by Embodiment 7 of the present invention.

FIG. 11 is a schematic diagram of the structure of the insertion port provided in Embodiment 7 of the present invention.

Fig. 12 is a cross-sectional view of a magnetic telescopic device provided by Embodiment 8 of the present invention.

Fig. 13 is a schematic structural diagram of an insertion port provided in Embodiment 8 of the present invention.

Detailed ways

The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the embodiments of the present invention, but should not be construed as limiting the present invention.

Example 1

Please refer to FIGS. 1 to 3, a magnetically attractive telescopic device 100 provided in this embodiment includes a housing 110, a sliding member 120, and a magnetic attraction mechanism 130. A cavity 111 is formed in the housing 110, and an insertion port 1111 is provided at one end of the cavity 111. The sliding member 120 has an insertion end 121 and a telescopic end 122. The insertion end 121 is inserted into the cavity 111 through the insertion opening 1111 and is slidably confined in the cavity 111. The telescopic end 122 protrudes from the insertion port 1111. The magnetic attraction mechanism 130 includes at least two first magnetic attraction members 131 and at least one second magnetic attraction member 132. Specifically, the first magnetic member 131 and the second magnetic member 132 are both permanent magnets. The first magnetic member 131 is disposed on the inner wall surface of the cavity 111 and the second magnetic member 132 is disposed on the side surface of the sliding member 120. The first magnetic attraction members 131 are arranged along the movement direction of the sliding member 120. Specifically, the first magnetic attraction members 131 are evenly arranged along a straight line.

When the sliding member 120 is stationary, at least one first magnetic member 131 and at least one second magnetic member 132 attract each other. When the sliding member 120 expands and contracts, the sliding member 120 slides, and the second magnetic member 132 moves from one first magnetic member 131 to the other first magnetic member 131 and attracts each other . The magnetic expansion device 100 fixes the housing 110 and the sliding member 120 by magnetic attraction. Therefore, the magnetic expansion device 100 has a simple structure, small size, easy installation and manufacturing, and a better hand feeling when pulled. The magnetic attraction type retractable device 100 using magnetic attraction has higher reliability, is not easy to be damaged, and has a longer service life.

A plurality of the first magnetic attraction members 131 are provided on the inner wall surface of the cavity 111. The arrangement of the magnetic poles of the plurality of first magnetic attracting members 131 is the same. Specifically, the inner wall surface of the cavity 111 is provided with a first groove (not shown in the figure) that matches the first magnetic member 131, and the first magnetic member 131 is embedded in the first magnetic member 131. One groove, stable installation. In this embodiment, the number of the first magnetic attraction member 131 is four. In some embodiments of the present invention, the number of the first magnetic attraction member 131 is 3, 5, 6, etc. A second magnetic attraction member 132 is disposed on the side surface of the sliding member 120 and is adjacent to the insertion end 121. Specifically, a second groove (not shown in the figure) is provided on the side of the sliding member 120, and the second magnetic attraction member 132 is embedded in the second groove.

An electric wire 150 passes through the sliding member 120. The sliding member 120 is provided with a first perforation 123 arranged along its length direction, and the electric wire 150 is inserted into the sliding member 120 through the first perforation 123.

A rigid bar 140 penetrates the sliding member 120. The sliding member is provided with second perforations 126 arranged along its length. The rigid bar 140 passes through the sliding member 120 through the second through hole 126, and the end of the rigid bar 140 is limited to the outlet of the installation hole 123. The rigid strip 140 is a steel wire. In some embodiments of the present invention, the rigid strip 140 is a rigid plastic wire, an aluminum alloy wire or a carbon fiber wire.

A wire compartment 1112 is formed between the insertion end 121 and the wall surface of the cavity 111, and the rear wall of the cavity 111 is also provided with a lead hole 1113 communicating with the wire compartment 1112. The electric wire 150 passes through the first through hole 123 and enters the electric wire warehouse 1112, the tail of the electric wire 150 is accommodated in the electric wire warehouse 1112, and the end of the electric wire 150 is led out from the lead hole 1113. The tail of the wire 150 is preferably a stretchable spring wire. The above structure can conceal the lead, further simplify the structure, improve the integration level, and beautify the appearance of the product.

The sliding member 120 is provided with a first limiting portion 124 adjacent to the insertion end 121, and the sliding member 120 is provided with a second limiting portion 125 adjacent to the telescopic end 122, the The first limiting portion 124 and the second limiting portion 125 are side walls of two ends of a strip groove. The insertion port 1111 is provided with a third limiting portion 11111, and the third limiting portion 11111 is a stopper matching the strip groove. The sliding member 120 is restricted by the cooperation of the first restricting portion 124 or the second restricting portion 125 and the third restricting portion 11111 respectively. When the sliding member 120 is inserted to the maximum stroke, the third limiting portion 11111 blocks the second limiting portion 125 to realize the limiting. When the sliding member 120 is withdrawn to the maximum stroke, the third limiting portion 11111 blocks the first limiting portion 124 to realize the limiting.

Example 2

Please refer to FIG. 4, the headwear provided by this embodiment includes a headband 200, and the headband 200 has two mounting ends 210. The head-mounted device further includes the magnetically attractive retractable device 100 provided in Embodiment 1, and the two magnetically retractable devices 100 are respectively disposed on the two mounting ends 210. Specifically, the mounting end 210 is fixedly connected to the telescopic end 122 of the sliding member 120, and the sliding member 120 is arc-shaped and elongated. The speaker module (not shown in the figure) is fixedly connected to the housing 110. The housing 110 is correspondingly arc-shaped and elongated.

The head-mounted device with the magnetic retractable device 100 is smaller, more portable, and has a longer service life.

Example 3

Referring to FIG. 5, the difference between this embodiment and the first embodiment is that a plurality of the first magnetic attraction members 131, 131' are provided on the inner wall surface of the cavity 111. The polarities of any two adjacent first magnetic attraction members 131, 131' are opposite to each other. In this embodiment, the number of the first magnetic attraction members 131, 131' is six. In some embodiments of the present invention, the number of the first magnetic attraction members 131, 131' is 4, 8, 10, etc. The two second magnetic attraction members 132, 132' are arranged on the side surface of the sliding member 120 and are adjacent to the insertion end 121, and the polarities of the two second magnetic attraction members 132, 132' are opposite set up. When the sliding member 120 is at rest, the two second magnetic attraction members 132, 132' respectively attract the two first magnetic attraction members 131, 131', the sliding member 120 slides, and the two The second magnetic attraction members 132, 132' move from the two first magnetic attraction members 131, 131' to the other two first magnetic attraction members 131, 131' and attract each other respectively. The above arrangement can provide a hand feeling when pulled, and when the two second magnetic attraction members 132, 132' are attracted to the two first magnetic attraction members 131, 131' respectively, the adsorption force is stronger and more stable .

The electric wire is integrally formed in the sliding part by injection molding. The rigid strip is integrally formed in the sliding part.

The rest of this embodiment is the same as that of Embodiment 1. For the features that are not explained in this embodiment, the explanation of Embodiment 1 is adopted, and will not be repeated here.

Example 4

Please refer to FIG. 6, the difference between this embodiment and Embodiment 1 is that a plurality of the first magnetic attraction members 131 are provided on the side surface of the sliding member 120, and the plurality of first magnetic attraction members 131 are The magnetic pole arrangement is the same. In this embodiment, the number of the first magnetic attraction member 131 is four. In some embodiments of the present invention, the number of the first magnetic attraction member 131 is 3, 5, 6, etc. A second magnetic attraction member 132 is disposed on the inner wall surface of the cavity 111 and is adjacent to the insertion port 1111.

The first limiting portion 124 and the second limiting portion 125 are both a bump, and the third limiting portion 11111 is a stopper.

Example 5

Referring to FIG. 7, the difference between this embodiment and Embodiment 1 is that a plurality of the first magnetic attraction members 131 with the same arrangement of magnetic poles are uniformly arranged on a side wall surface of the cavity 111, and a plurality of magnetic poles The first magnetic attraction members 131' with the same arrangement are uniformly arranged on the other side wall surface of the cavity 111; the two second magnetic attraction members 132, 132' are respectively arranged on the sliding member 120 On both sides. The above arrangement can increase the resistance of the sliding member 120 when it is pulled.

Example 6

Referring to FIGS. 8 and 9, the difference between this embodiment and Embodiment 1 is that a guide groove 1114 is provided on a bottom side wall of the cavity 111, and the sliding member 120 is opposite to the guide groove 1114. match. The guide groove 1114 functions as a limit, and restricts the movement of the sliding member 120 to prevent it from shaking.

The third limiting portion 11111 is a baffle plate provided on the bottom side of the insertion port 1111. The first limiting portion and the second limiting portion are both stoppers that cooperate with the baffle.

Example 7

Please refer to FIG. 10 and FIG. 11. The difference between this embodiment and Embodiment 6 is that the guide groove 1114' is provided on a top side wall of the cavity 111.

The third limiting portion 11111' is a baffle plate provided on the top side of the insertion port 1111.

The rest of this embodiment is the same as that of Embodiment 6, and for the features not explained in this embodiment, the explanation of Embodiment 6 is adopted, and will not be repeated here.

Example 8

Please refer to Figures 12 and 13, the difference between this embodiment and the embodiment 6 is that the two opposite side walls of the cavity 111 are provided with guide grooves 1114, 1114', and the sliding member 120 is The guide grooves 1114 and 1114' match. The two guiding grooves 1114, 1114' can further improve the guiding and limiting effect.

The third limiting portions 11111 and 11111' are baffles arranged on the bottom side and the top side of the insertion port 1111, respectively.

Example 9

The difference between this embodiment and the first embodiment is that the first magnetic member 131 is a magnet, and the second magnetic member 132 is an iron member.

Example 10

The difference between this embodiment and the first embodiment is that the first magnetic member 131 is an iron member, and the second magnetic member 132 is a magnet.

The above descriptions are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention shall be included in the protection of the present invention. Within range.

Claims

Magnetic telescopic device, including:

A housing, a cavity is formed in the housing, and an insertion port is provided at one end of the cavity; and

A sliding member, the sliding member having an insertion end and a telescopic end, the insertion end is inserted into the cavity through the insertion port and slidably limited in the cavity; the telescopic end extends from the insertion port out;

It is characterized in that it also includes:

A magnetic attraction mechanism, the magnetic attraction mechanism includes at least two first magnetic attraction members and at least one second magnetic attraction member; both the first magnetic attraction member and the second magnetic attraction member are magnets or are respectively magnets And iron parts, both are magnetically adsorbed;

The first magnetic attraction member is arranged on the inner wall surface of the cavity and the second magnetic attraction member is arranged on the side surface of the sliding member;

Or the first magnetic attraction member is arranged on the side surface of the sliding member and the second magnetic attraction member is arranged on the inner wall surface of the cavity;

The first magnetic attraction members are arranged along the moving direction of the sliding member; when the sliding member is stationary, at least one first magnetic attraction member and at least one second magnetic attraction member attract each other; the sliding member slides, The second magnetic attraction member moves from one of the first magnetic attraction members to the other first magnetic attraction member and attracts each other.
The magnetostrictive telescopic device according to claim 1, wherein a plurality of the first magnetic attraction members are provided on the inner wall surface of the cavity, and any two adjacent first magnetic attraction members The two second magnetic attraction members are arranged on the side surface of the sliding member and are adjacent to the insertion end, and the polarities of the two second magnetic attraction members are arranged oppositely; the When the sliding member is stationary, the two second magnetic attraction members are attracted to the two first magnetic members respectively, the sliding member slides, and the two second magnetic The magnetic attraction piece moves to the other two first magnetic attraction pieces and attracts each other respectively.
The magnetostrictive telescopic device according to claim 1, wherein a plurality of the first magnetic attraction members are provided on the inner wall surface of the cavity; the magnetic poles of the plurality of first magnetic attraction members are arranged in the same way ; One of the second magnetic attraction member is provided on the side surface of the sliding member and adjacent to the insertion end.
The magnetostrictive telescopic device according to claim 1, wherein a plurality of the first magnetic attraction members are provided on the side surface of the sliding member, and one of the second magnetic attraction members is provided on the cavity And adjacent to the insertion port.
The magnetic telescopic device according to any one of claims 1 to 4, wherein a wire is inserted through the sliding member or integrally formed in the sliding member; the sliding member is provided with an edge The first perforation is arranged in the length direction, and the electric wire passes through the sliding member through the first perforation.
The magnetically attracting telescopic device according to any one of claims 1 to 4, wherein a rigid bar penetrates the sliding member or is integrally formed in the sliding member; the sliding member is provided with A second perforation arranged along its length direction; the rigid strip passes through the sliding member through the second perforation, and the end of the rigid strip is limited to the outlet of the second perforation.
The magnetic telescopic device according to any one of claims 1 to 4, wherein the insertion end and the back wall of the cavity form a wire compartment, and the wall surface of the cavity is also provided with A lead hole communicated with the wire compartment.
The magnetically attracting telescopic device according to any one of claims 1 to 4, wherein the sliding member is provided with a first limiting portion adjacent to the insertion end, and the sliding member is provided with A second limiting portion adjacent to the telescopic end; a third limiting portion is provided on the insertion port, and the sliding member passes through the first limiting portion or the second limiting portion and the third limiting portion respectively. The limit part cooperates to limit the position.
The magnetically attracting telescopic device according to any one of claims 1 to 4, wherein a guide groove is provided on one side wall or two opposite side walls of the cavity, and the sliding member and the guide The slots match.
The headgear includes a headband, and the headband has two mounting ends; and is characterized in that it also includes two magnetically attractive telescopic devices according to any one of claims 1-9, and two of the magnetically attractive The telescopic devices are respectively arranged on the two installation ends.