CN113471747B - Connecting device, wireless earphone and card-inserting electronic equipment - Google Patents

Abstract

The embodiment of the invention discloses a connecting device, a wireless earphone and card inserting electronic equipment, and relates to the technical field of electronic connectors, wherein the connecting device comprises: the shell comprises a containing cavity, and a first boss, a second boss and a third boss which are arranged on the side wall of the containing cavity, wherein the first boss comprises a first plane and a first inclined plane which are connected with each other, the second boss is close to the first plane and protrudes out of the side wall in the same direction as the first boss, and the third boss is close to the first inclined plane and protrudes out of the side wall in the opposite direction as the first boss; the elastic clamping hook is movably arranged in the accommodating cavity and comprises a hook part, a connecting part and a first fixing rod protruding out of the connecting part, wherein the hook part and the connecting part are connected with each other; the push rod is connected with the connecting part, extends out of the accommodating cavity and moves synchronously with the elastic clamping hook; the reset elastic piece comprises a first end connected with the first fixing rod and a second end connected with the shell. The connecting device provided by the embodiment of the invention can be used for quickly disassembling and assembling the battery of the wireless earphone and the plug-in card of the electronic equipment.

Description

Connecting device, wireless earphone and card-inserting electronic equipment

Technical Field

The invention relates to the technical field of electronic connectors, in particular to a connecting device, a wireless earphone and card inserting electronic equipment.

Background

The true wireless Bluetooth headset (True Wireless Stereo, TWS) is popular with people due to the advantages of small size, no need of using a physical wire harness to connect with electronic equipment, convenience in carrying and the like. In the related art, a TWS is provided with a rechargeable storage case, and can be placed in the storage case for charging and storage when the TWS power is low.

The TWS is of an integrated structure, and the TWS needs to be integrally placed in the storage box for charging the batteries of the TWS. TWS can produce TWS's use vacancy in receiver charging process, can't continue to use. TWS charging power is generally low and the time required for full charge is long. And after the earphone is used for a period of time, the internal battery of the earphone can be aged and worn, so that the standby time is greatly shortened.

Disclosure of Invention

In view of the above, an object of the present invention is to solve the above problems in the prior art and provide a connection device, a wireless earphone, and a card-inserting electronic device.

According to a first aspect of the present invention, there is provided a connection device comprising: the shell comprises a containing cavity, and a first boss, a second boss and a third boss which are arranged on the side wall of the containing cavity, wherein the first boss comprises a first plane and a first inclined plane which are connected with each other, the second boss is close to the first plane and protrudes out of the side wall in the same direction as the first boss, and the third boss is close to the first inclined plane and protrudes out of the side wall in the opposite direction as the first boss; the elastic clamping hook is movably arranged in the accommodating cavity and comprises a hook part, a connecting part and a first fixing rod protruding out of the connecting part, wherein the hook part and the connecting part are connected with each other; the push rod is connected with the connecting part, extends out of the accommodating cavity and moves synchronously with the elastic clamping hook; the reset elastic piece comprises a first end connected with the first fixing rod and a second end connected with the shell.

Preferably, the maximum distance of the protruding side wall of the first boss is a first distance, and the maximum distance of the protruding side wall of the second boss is a second distance, wherein the second distance is larger than the first distance.

In any of the above aspects, preferably, the second boss includes a second inclined surface adjacent to the first plane, the second inclined surface being parallel to the first inclined surface.

In any of the above aspects, preferably, the third protrusion includes a third inclined surface facing the first inclined surface, and an angle of the third inclined surface is complementary to an angle of the first inclined surface.

In any of the above solutions, it is preferable that the housing 1 further includes a second fixing rod disposed on the side wall 12 of the accommodating cavity 11 and located at an end of the accommodating cavity away from the second protrusion, and the second end of the return elastic member is connected to the second fixing rod.

In any of the above aspects, it is preferable that the hook portion is provided with a guide slope.

In the above aspect, it is further preferable that in the first state, the guide slope abuts against the first slope; in the second state, the hook part is buckled with the first plane; in the third state, the hook part is bent towards the third boss and away from the second boss.

In any of the above schemes, preferably, the return elastic member is a spring or an elastic rubber column.

In any of the above schemes, preferably, the elastic hook is a metal elastic sheet, wherein the hook is bent at a set angle, and the first fixing rod protrudes out of the plate surface of the connecting part; the push rod is perpendicular to the first fixing rod and extends out of one end of the shell, which is far away from the second boss.

In any of the above aspects, preferably, the hook portion is bent at a set angle with respect to the connecting portion, and the elastic hook is not elastically deformed, and the hook portion is away from the side wall of the third boss protruding with respect to the connecting portion.

According to a second aspect of the present invention, there is provided a wireless earphone, comprising an earphone body, a battery compartment provided in the earphone body, and the connecting device of any one of the first aspect and the embodiments, wherein a push rod of the connecting device protrudes from a bottom of the battery compartment.

According to a third aspect of the present invention, there is provided a card-inserting electronic device, including a card slot, and the connection device according to any one of the first aspect and the embodiments, wherein a push rod of the connection device extends into the card slot.

Based on the connecting device, the wireless earphone and the card inserting electronic equipment provided by the invention, the push rod is pushed to enable the elastic clamping hook to be clamped with the first boss, and the push rod elastic clamping hook is pushed again to drive the push rod to extend out of the shell under the action of the reset elastic piece. The wireless earphone with the connecting device can realize the rapid disassembly and assembly of the battery of the wireless earphone, and reduce the use gap of the wireless earphone; the card-inserting electronic equipment provided with the connecting device is convenient for operators to take out the cards such as the memory card, the telephone card and the like from the card slot.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

FIG. 1 is a schematic perspective view of an embodiment of a connecting device according to the present invention;

FIG. 2 is a schematic diagram of an embodiment of an elastic hook;

FIG. 3 is a schematic cross-sectional view of another embodiment of the connecting device of the present invention;

FIG. 4 is a schematic cross-sectional view of a further embodiment of the connecting device of the present invention;

FIG. 5 is a schematic cross-sectional view of a further embodiment of the connecting device of the present invention;

FIG. 6 is a schematic cross-sectional view of a further embodiment of the connecting device of the present invention;

FIG. 7 is a schematic cross-sectional view of another embodiment of the connecting device of the present invention;

fig. 8 is a schematic structural diagram of an embodiment of a wireless headset according to the present invention;

fig. 9 is a schematic structural diagram of another embodiment of a wireless headset according to the present invention.

Reference numerals: 1-a housing; 11-a receiving cavity; 12-side walls; 13-a first boss; 131-a first plane; 132-a first ramp; 14-a second boss; 141-a second bevel; 15-a third boss; 151-a third ramp; 2-an elastic hook; 21-a hook; 211-guiding inclined plane; 22-connecting part; 3-a first fixing rod; 4-pushing rod; 5-resetting the elastic member; 51-a first end; 52-a second end; 6-a second fixing rod; 7-avoiding holes; 10-earphone body; 101-a battery compartment; 102-bin cover.

Detailed Description

The present invention is described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth in detail. The present invention will be fully understood by those skilled in the art without the details described herein. Well-known methods, procedures, flows, components and circuits have not been described in detail so as not to obscure the nature of the invention.

Moreover, those of ordinary skill in the art will appreciate that the drawings are provided herein for illustrative purposes and that the drawings are not necessarily drawn to scale.

Unless the context clearly requires otherwise, the words "comprise," "comprising," and the like in the description are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, it is the meaning of "including but not limited to".

In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly, as they may be fixed, removable, or integral, for example; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

The batteries of wireless headsets currently on the market are mostly not replaceable. When the battery power of the wireless earphone is consumed, the mode of instantly recovering the battery to a full state or replacing the full battery cannot be realized; and when the wireless earphone is used for a period of time, the battery is aged and consumed, the standby time is greatly shortened, and the cost for quickly replacing a new battery (the earphone can be used normally) is high and is difficult to realize.

The embodiment of the present invention aims to solve the technical problems in the related art, and provides a connecting device, and fig. 1 is a schematic perspective view of an embodiment of the connecting device of the present invention; FIG. 2 is a schematic diagram of an embodiment of an elastic hook; fig. 3 is a schematic cross-sectional view of another embodiment of the connecting device of the present invention. As shown in fig. 1 to 3, the connection device may include a housing 1, an elastic hook 2, and a push rod 4, wherein the housing 1 may include a receiving cavity 11, and a first boss 13, a second boss 14, and a third boss 15 disposed on a sidewall 12 of the receiving cavity 11, the first boss 13 including a first plane 131 and a first inclined plane 132 connected to each other, the second boss 14 being adjacent to the first plane 131 and protruding from the sidewall 12 in the same direction as the first boss 13, and the third boss 15 being adjacent to the first inclined plane 132 and protruding from the sidewall 12 opposite to the first boss 13; the elastic clamping hook 2 can be movably arranged in the accommodating cavity and comprises a hook part 21, a connecting part 22 and a first fixing rod 3 protruding out of the connecting part 22, which are connected with each other; the push rod 4 can be connected with the connecting part 22, extends out of the accommodating cavity 11 and moves synchronously with the elastic clamping hook 2; the return spring 5 may include a first end 51 connected to the first fixing lever 3 and a second end 52 connected to the housing 1.

In this embodiment, the housing 1 may be a packaging plastic housing, and the plastic housing has a large temperature adaptation range and strong specification adaptability, and has the functions of flame retardance, corrosion resistance, water resistance and chemical corrosion resistance. And the plastic shell has light dead weight, high strength, good fireproof performance, safety and energy conservation. In one example, the casing 1 may be a cuboid structure with a containing cavity 11 in a hollow manner, wherein the side wall 12 of the containing cavity 11 may be enclosed by two sets of opposite faces, two ends of the enclosed containing cavity are plugged, and a through hole for the push rod 4 to move is formed at one end of the plug.

The elastic hook 2 can be formed by bending a sheet metal plate, and the metal plate has certain elasticity, namely the formed metal plate can cancel the acting force after being slightly bent, and the metal plate can also recover to the original shape. In one example, the elastic hook 2 may be formed by bending a rectangular metal sheet. The first fixing rod 3 protrudes toward the bending direction of the hook portion 21 from the panel of the connecting portion 22 of the elastic hook 2.

The push rod 4 is connected to the connecting portion 22 at an edge of the connecting portion 22 remote from the hook portion 21. In one example, the position where the push rod 4 is connected to the connecting portion 22 may be at the midpoint of the edge of the connecting portion 22. The push rod 4 in this embodiment may be a round rod structure or a prismatic structure. The through-hole provided in the housing 1 is likewise of polygonal design, in accordance with the prismatic push rod 4, wherein the prism may be a triangular prism, a quadrangular prism, a pentagonal prism, etc. The push rod 4 is of a prismatic structure and is matched with the polygonal through hole, so that the push rod 4 can be prevented from circumferential rotation in the axial movement process to influence the normal use of the elastic clamping hook 2. In this embodiment, the push rod 4 is connected with the connecting portion 22, the elastic hook 2 can be stopped in the accommodating cavity 11 by the connecting portion 22, and the push rod 4 can be prevented from being pushed into the accommodating cavity 11 by the through hole to be difficult to take out by matching the first fixing rod 3 with the reset elastic piece 5.

In the accommodating cavity 11, two opposite side walls 12 are selected, a first boss 13 may protrude toward the opposite side wall 12 at the middle part of one side wall 12, the cross section of the first boss 13 may be a right triangle, and the first inclined plane 132 corresponding to the inclined plane is closer to the push rod 4 than the first plane 131 corresponding to the other right angle side except for the right angle side connected with the side wall 12.

The second boss 14 is disposed on the same side wall 12 as the first boss 13, wherein a maximum distance of the first boss 13 protruding the side wall 12 is a first distance, and a maximum distance of the second boss 14 protruding the side wall 12 is a second distance, wherein the second distance is greater than the first distance. It can also be said that the second boss 14 protrudes beyond the side wall 12 a greater distance than the first boss 13 protrudes beyond the side wall 12. I.e. the second boss 14 is thicker than the first boss 13 with respect to the side wall 12.

In this embodiment, the first boss 13 is disposed between the second boss 14 and one end of the housing 1 with the through hole, and the distance between the second boss 14 and the first plane 131 is smaller than the distance between the first plane 132 and the second plane 14.

A third boss 15 is provided to protrude from the other side wall 12 opposite to the side wall 12 provided with the first boss 13 and the second boss 14. The surface of the third boss 15 facing away from the through hole gradually approaches the through hole from the other sidewall 12, i.e., the third inclined surface 151. The sum of the thicknesses of the third boss 15 and the second boss 14 is smaller than the interval between the opposite side walls 12.

In some embodiments, the elastic hook 2 may be a metal spring, wherein the hook 21 is bent at a set angle, so that the hook 21 has a certain strength of elasticity. In some embodiments, the hook portion 21 is bent at a set angle relative to the connecting portion 22, so that the hook portion 21 is away from the side wall 12 protruding from the third boss 15 relative to the connecting portion 22 without elastic deformation of the elastic hook 2. The first fixing rod 3 can protrude out of the plate surface of the connecting part 22 and is fixedly connected with the connecting part 22; the push rod 4 may be perpendicular to the first fixing rod 3 and protrude from an end of the housing 1 remote from the second boss 14.

FIG. 4 is a schematic cross-sectional view of a further embodiment of the connecting device of the present invention; FIG. 5 is a schematic cross-sectional view of a further embodiment of the connecting device of the present invention; FIG. 6 is a schematic cross-sectional view of a further embodiment of the connecting device of the present invention; fig. 7 is a schematic cross-sectional view of another embodiment of the connecting device of the present invention. As shown in fig. 3-7, in some embodiments, the second boss 14 may be provided with a second ramp 141 proximate the first plane 131. In one example, the second inclined surface 141 may be parallel to the first inclined surface 132. In another example, the acute angle between the second inclined plane 141 and the first plane 131 is smaller than the acute angle between the first inclined plane 132 and the first plane.

By the design, the hook part 21 can be ensured to bend after contacting the second inclined plane 141, and the distance from the first plane 131 to the second inclined plane 141 can be smaller. If the acute angle between the second inclined plane 141 and the first plane 131 is greater than the acute angle between the first inclined plane 132 and the first plane, the upward moving distance is greater, the deformation of the hook 21 is smaller, and the hook is difficult to pop out when separating from the second inclined plane 141, so that the subsequent hook is affected to contact the first inclined plane 132.

With continued reference to fig. 3-7, in some embodiments, the third boss 15 may be provided with a third ramp 151 toward the first ramp 132. In one example, the angle of the third inclined surface 151 may be complementary to the angle of the first inclined surface 132. In another example, the angle of the third inclined surface 151 may be smaller than the complement angle of the first inclined surface 132. By the design, enough space can be reserved for deformation of the hook part 21 in the process of contacting the second inclined plane 141 and moving upwards and in the process of separating from the second inclined plane 141, so that the deformation is prevented from being recovered in the process of bending deformation of the hook part 21 or separating from the second inclined plane 141.

In some embodiments, the housing 1 may further include a second fixing rod 6 disposed on the sidewall 12 of the accommodating cavity 11 and located at an end of the accommodating cavity 11 remote from the second boss 14, and the second end 52 of the reset elastic member 5 is connected to the second fixing rod 6. So that the second fixing rod 6 is kept relatively static to the shell 1, the second end 52 of the reset elastic piece 5 is conveniently hooked, and the structure of the shell 1 is prevented from being damaged.

In some embodiments, the return elastic member 5 is a spring or an elastic rubber column. The return elastic member 5 may use a spring. The spring or the elastic glue column can press against the first inclined surface 132 when the hook 21 is in contact with the first inclined surface 132 and remain stationary without sliding up to the first plane 131. During pushing the push rod 4, the spring or the elastic rubber column is stretched; after the external force of the push rod 4 is removed, the spring or the elastic rubber column restores the shape, and under the cooperation of the first fixing rod 3 and the second fixing rod 6, the elastic clamping hook 2 moves from the second boss 14 to the first boss 13. In the embodiment, the spring or the elastic rubber column is used, the operator pushes the push rod 4 to the set position and then releases the push rod 4, the push rod 4 can be automatically restored, and the tedious operation of the operator to operate the push rod back and forth is omitted.

In a state that the hook portion 21 contacts and presses the first inclined surface 132, the elastic member 5 is reset to make the edge of the connecting portion 22 closely contact with the bottom portion where the through hole is formed; after the push rod 4 is pushed to be separated from the second inclined plane 141 under the action of the external force and the external force is removed, the elastic force of the reset elastic member 5 is increased to the maximum value, so that the elastic hook 2 can be quickly pulled back to the bottom of the through hole formed in the shell 1, and the hook portion 21 is restored to be in contact with the first inclined plane 132.

In some embodiments, the hook 21 may be provided with a guide slope 211. The elastic hook 2 is made to have a certain thickness, and a guiding inclined plane 211 with an angle complementary to that of the first inclined plane 132 can be arranged at the contact position of the hook part 21 with the first inclined plane 132 and the second inclined plane 141. In the process of pushing the push rod 4 to move the elastic hook 2 to the second boss 14, the surface-surface contact between the hook 21 and the first inclined surface 132 and the second inclined surface 141 can be realized, the stability in the moving process is ensured, the damage to the structure of the hook 21 caused by the line-surface collision between the hook 21 and the second inclined surface 141 is avoided, and the structural stability of the connecting device of the embodiment is ensured.

In some embodiments, the hook portion 21 is bent at a set angle relative to the connecting portion 22, and the elastic hook 2 is in a state that no elastic deformation is generated, and the hook portion (21) is away from the side wall 12 protruding from the third boss 15 relative to the connecting portion (22).

In the process of using the connecting device of the embodiment, the elastic clamping hook 2 interacts with the shell 1, so that the push rod 4 reciprocates along the set direction, and the quick disassembly of the battery or the plug-in card is realized. The following describes each state of the connection device of the present embodiment in detail with reference to fig. 3 to 7.

In the first state, as shown in fig. 3, the guide slope 211 abuts against the first slope 132. In this state, the guide slope 211 may be in contact with the first slope 132 or may be spaced apart by a small distance, and the lower side edge of the connection part 22 is pressed against the bottom of the receiving chamber 11 by the restoring elastic member 5. The push rod 4 extends the longest length out of the housing 1.

In the first state, the push rod 4 is forced in the direction toward the housing 1, the guide inclined surface 211 of the hook portion 21 moves upward along the first inclined surface 132, the hook portion 21 bends toward the third boss 15, and after reaching the connection between the first inclined surface 132 and the first plane 131, the hook portion 21 moves toward the side wall 12 under the action of self-elasticity, and the second state shown in fig. 4 is reached. In the second state, the hook portion 21 is buckled with the first plane 131, so that a part of the push rod 4 extends into the accommodating cavity 11, and the push rod 4 extending out of the shell 1 is prevented from affecting the normal installation of the battery or the plug-in card. In one example, the housing 1 is further provided with a relief hole 7 for communicating the outside of the housing 1 with the accommodation chamber 11. The purpose of forming the avoidance hole 7 on the shell 1 is that: structural damage of the hook portion 21 caused by collision of the hook portion 21 with the side wall 12 is avoided during the process of transferring the hook portion 21 of the connecting device from the first state to the second state.

As shown in fig. 5, the push rod 4 is continuously pushed toward the second boss 14, so that the guide slope 211 of the hook 21 contacts the second slope 141, and the third state shown in fig. 6 to 7 is reached. In the third state, the push rod 4 is biased to the edge above the second inclined surface 141 after the guide inclined surface 211 of the hook 21 contacts the second inclined surface 141. The push rod 4 is continuously forced, the reset elastic piece 5 is continuously stretched, as shown in fig. 7, ejection phenomenon is generated at the moment that the hook part 21 is separated from the second inclined plane 141, and the hook part is instantaneously bent towards the third boss 15 and away from the second boss 14.

After the acting force of the push rod 4 is removed, the elastic clamping hook 2 moves rapidly towards the first boss 13 according to the second boss 14 under the action of the shrinkage force of the reset elastic piece 5. Since the distance that the second boss 14 protrudes from the side wall 12 is greater than the distance that the first boss 13 protrudes from the side wall 12, the hook portion 21 will not be caught on the first plane 131 during the recovery deformation. After the hook portion 21 is restored to the shape, it directly contacts the first inclined surface 132 to the first state. In this embodiment, the first state, the second state, and the third state may be sequentially exchanged according to actual use conditions. The present embodiment is not particularly limited as to what state is the first state to start the operation of the connection device.

Based on the same or similar design considerations, a second aspect of the embodiment of the present invention provides a wireless earphone, and fig. 8 is a schematic structural diagram of an embodiment of the wireless earphone of the present invention; fig. 9 is a schematic structural diagram of another embodiment of the wireless earphone according to the present invention, as shown in fig. 8 and 9, the wireless earphone may include an earphone body 10, a battery compartment 101 disposed on the earphone body 10, and a connection device according to any one of the first aspect and the embodiments, where a push rod 4 of the connection device extends from a bottom of the battery compartment 101. The shell 1 of the connecting device can be formed on the shell of the earphone body 10, namely, the shell 1 of the connecting device is formed on the shell of the earphone body 10, so that the wireless earphone battery can be replaced, and the battery is convenient and quick to detach.

In this embodiment, the battery of the wireless earphone is detachable, where the battery may be a lithium ion rechargeable button battery or an external storage battery, and a housing of the wireless earphone may be provided with a battery compartment 101 for accommodating the battery, and an opening is formed in the bottom of the battery compartment 101. The connecting device structure is arranged in the shell of the earphone body 10, is covered by the shell of the earphone body 10, and the push rod 4 movably stretches into the battery compartment 101 from a hole at the bottom of the battery compartment 101 and abuts against the button battery.

The bin cover 102 hinged with the earphone body 10 is opened, the battery is pressed into the battery bin 101, the push rod 4 drives the elastic clamping hook 2 to move, the hook part 21 of the elastic clamping hook 2 is clamped with the first plane 131, the battery is prevented from being ejected out of the battery bin 101 under the action of the reset elastic piece 5, and finally the bin cover 102 is covered, so that the stability of the battery fixed in the battery bin 101 is further enhanced. When the battery is dismounted from the battery compartment 101, the battery is pressed, the push rod 4 is separated from the first plane 131 to limit, the battery is ejected out of the battery compartment 101 under the action of the reset elastic piece 5, and the trouble that an operator dismounts the battery by hands or auxiliary tools is avoided.

The wireless earphone with the replaceable battery can quickly replace the full battery when the battery is consumed or nearly consumed, and the detached battery is charged, so that the use vacancy of the wireless earphone is reduced, and the use experience of a user is improved.

Based on the same or similar design concept, a third aspect of the embodiments of the present invention provides a card-inserting electronic device, which includes a card slot, and the connection device of any one of the first aspect and the embodiments, where the push rod 4 of the connection device extends into the card slot. The card-inserting electronic device in the embodiment can be a mobile phone, a tablet computer, a notebook computer, an electric meter, a water meter, a gas meter, an ETC vehicle-mounted terminal device, a camera and the like; the kind of card inserted in the card-inserting electronic device may be a telephone card, a memory card, an electric card, a water card, a gas card, an ETC card, or the like.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A connection device, comprising:

the shell (1) comprises a containing cavity (11) and a first boss (13), a second boss (14) and a third boss (15) which are arranged on the side wall (12) of the containing cavity (11), wherein the first boss (13) comprises a first plane (131) and a first inclined plane (132) which are connected with each other, the second boss (14) is close to the first plane (131) and protrudes out of the side wall (12) in the same direction as the first boss (13), and the third boss (15) is close to the first inclined plane (132) and protrudes out of the side wall (12) in the opposite direction to the first boss (13);

the elastic clamping hook (2) is movably arranged in the accommodating cavity and comprises a hook part (21) and a connecting part (22) which are connected with each other and a first fixing rod (3) protruding out of the connecting part (22);

the push rod (4) is connected with the connecting part (22), extends out of the accommodating cavity (11) and moves synchronously with the elastic clamping hook (2);

a return elastic member (5) comprising a first end (51) connected to the first fixed rod (3) and a second end (52) connected to the housing (1);

the shell (1) is provided with an avoidance hole (7), the avoidance hole (7) is communicated with the outside of the shell (1) and the accommodating cavity (11), and the avoidance hole (7) is positioned between the first boss (13) and the second boss (14);

the hook (21) is provided with a guide slope (211), and the push rod (4) is configured to reciprocate to switch the state of the connecting device;

in a first state, the guide ramp (211) abuts the first ramp (132);

in a second state, the hook (21) is buckled with the first plane (131);

in a third state, the hook (21) is bent away from the second boss (14) toward the third boss (15).

2. The connection device according to claim 1, characterized in that the maximum distance of the first boss (13) protruding the side wall (12) is a first distance and the maximum distance of the second boss (14) protruding the side wall (12) is a second distance, wherein the second distance is larger than the first distance.

3. The connection device according to claim 2, characterized in that the second boss (14) comprises a second inclined surface (141) adjacent to the first plane (131), the second inclined surface (141) being parallel to the first inclined surface (132).

4. The connection device according to claim 1, characterized in that the third boss (15) comprises a third bevel (151) facing the first bevel (132), the angle of the third bevel (151) being complementary to the angle of the first bevel (132).

5. The connection device according to claim 1, characterized in that the housing (1) further comprises a second fixing rod (6) arranged at a side wall (12) of the receiving cavity (11) and at an end of the receiving cavity (11) remote from the second boss (14), the second end (52) of the return spring (5) being connected to the second fixing rod (6).

6. The connecting device according to any one of claims 1 to 5, wherein the elastic hook (2) is a metal spring sheet, wherein the hook portion (21) is bent at a set angle, and the first fixing rod (3) protrudes from the plate surface of the connecting portion (22); the push rod (4) is perpendicular to the first fixing rod (3) and extends out of one end of the shell (1) far away from the second boss (14).

7. The connecting device according to claim 6, characterized in that the hook portion (21) is bent at a set angle with respect to the connecting portion (22), the elastic hook (2) being in a condition of no elastic deformation, the hook portion (21) being distanced from the side wall (12) of the third boss (15) with respect to the connecting portion (22).

8. A wireless earphone characterized by comprising an earphone body (10), a battery compartment (101) arranged on the earphone body (10), and the connecting device according to any one of claims 1 to 7, wherein a push rod (4) of the connecting device extends out from the bottom of the battery compartment (101).

9. A card-insertion electronic device comprising a card slot and a connecting device according to any one of claims 1 to 7, the push rod (4) of the connecting device extending into the card slot.