Music playing device used in cooperation with zip-top can and zip-top can with music playing device

Abstract

The embodiment of the utility model provides a music playing device used in cooperation with a zip-top can and a zip-top can with the music playing device, the music playing device comprises a box body and an audio playing module assembled in the box body, the box wall of the box body is provided with a sound outlet hole, and the audio playing module comprises an audio playing device, a battery and a switch assembly. A bottom plate of the box body is provided with a hanging assembly, and the bottom wall of the box body is also provided with a through hole; the switch assembly comprises a first contact electrically connected with the battery, a second contact electrically connected with the audio playing device, a conductive piece used for electrically connecting the first contact and the second contact, and an elastic control element used for applying elastic force to enable the conductive piece to be kept at a conduction position correspondingly abutting against and conducting the first contact and the second contact. The elastic control element drives the conductive piece to move to a disconnection position where the first contact and the second contact are disconnected under the reverse thrust effect of the tank body. According to the ring-pull can, the music playing device and different ring-pull cans can be assembled in a matched mode, and machining is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of mini music devices, and in particular to a music playing device used in conjunction with a can and a can with the music playing device. Background Art

[0002] In order to meet the demand of being able to listen to music at any time, various mini music players have begun to enter people's lives, and currently, mini music players have also begun to develop in the direction of being combined with daily necessities or electronic products.

[0003] There is a can with a music playing device, comprising a can body, a can cover which is sealed and assembled on the top of the can body and is provided with a circulation hole, a sealing sheet which seals and covers the circulation hole and is fixed with a pull ring on the outside, and a music playing device assembled on the can cover, wherein a pit which is recessed into the inside of the can body and is not connected with the accommodating cavity inside the can body is formed on the can cover, and the music playing device is adapted to be installed in the pit, and the music playing device comprises a box body, a playing component and a power supply component for supplying power to the playing component, a sound outlet hole and a connecting hole are respectively provided on the top side of the box body, the power supply component comprises a battery, a normally closed switch arranged between the battery and the playing component, and an insulating sheet which is inserted between two contact electrodes of the normally closed switch at one end to isolate the two contact electrodes, the playing component, the battery and the normally closed switch are all encapsulated in the box body, and the other end of the insulating sheet extends to the outside of the box body through the connecting hole and is connected to the pull ring.

[0004] However, the inventors found during the specific implementation that the seamless connection between the insulating sheet and the pull ring, the embedded structure of the box body, the relative sealing of the pit, etc., all increase the processing steps and production costs. Moreover, the music player and the can must be produced one-to-one at the same time, and the music player cannot be sold separately. Users cannot choose different music players to match various cans according to their preferences when purchasing. The shelf life of the cans is also difficult to control and lacks flexibility. All of the above factors lead to a poor user experience in actual use. Utility Model Content

[0005] The technical problem to be solved by the embodiment of the utility model is to provide a music playing device used in conjunction with a can, which can realize the paired assembly of the music playing device and different cans.

[0006] A further technical problem to be solved by the embodiments of the utility model is to provide a can with a music player, which can realize the paired assembly of the music player and different cans and is more convenient to process.

[0007] In order to solve the above technical problems, the embodiment of the utility model provides the following technical solutions: a music playing device used with a can, comprising a box body and an audio playing module encapsulated in the box body, a sound outlet hole is provided on the box wall of the box body, and the audio playing module comprises an audio playing device arranged opposite to the sound outlet hole and a battery for powering the audio playing device;

[0008] The outer surface of the bottom plate of the box body is provided with a mounting assembly for detachably mounting the box body on the pull ring of the can, and a through hole is also provided on the bottom wall of the box body;

[0009] The audio playback module also includes: a switch component arranged in the power supply circuit between the battery and the audio playback device, the switch component includes a first contact electrically connected to the battery, a second contact electrically connected to the audio player, a conductive member for electrically connecting the first contact and the second contact, and an elastic control element fixed to the conductive member and used to apply elastic force to keep the conductive member in a conductive position where the first contact and the second contact are correspondingly abutted and conductive, one end of the elastic control element extends from the through hole to the outside of the box body to elastically press against the can body of the can, and under the action of the reverse thrust of the can body, the conductive member is driven to move to a disconnected position where the first contact is disconnected from the second contact.

[0010] Furthermore, the audio playback module also includes a PCB board fixed in the box body, and the first contact and the second contact are both arranged on the PCB board.

[0011] Furthermore, the elastic control element includes:

[0012] A movable rod correspondingly penetrates the through hole and has one end extending out of the box body to abut against the tank body, the conductive member is disposed at one end of the movable rod located in the box body, and the movable rod is also provided with an anti-slip stopper for preventing the movable rod from completely sliding out of the box body through the through hole; and

[0013] An elastic element has one end fixed relatively to the box body and the other end abutting against the movable rod to push the movable rod to move along the axial direction so as to keep the conductive member at the conducting position.

[0014] Furthermore, a sliding hole is correspondingly opened on the PCB board, the first contact and the second contact are correspondingly arranged on opposite sides of the sliding hole, the movable rod is T-shaped and includes a sliding rod portion correspondingly penetrated in the sliding hole and the bottom end of which extends from the through hole on the bottom plate to the outside of the box body, and a pressing portion laterally arranged at the top end of the sliding rod portion, the pressing portion, the first contact and the second contact are all located on the same side of the PCB board, the pressing portion has a width greater than the aperture of the sliding hole and the pressing portion also constitutes an anti-slip stop portion, the conductive member is fixed to a side surface of the pressing portion facing the PCB board or the pressing portion is made of conductive material and the conductive member is constituted by the pressing portion, the side surface of the sliding rod portion is formed with an outwardly protruding step near the bottom end, and the elastic element is a spring which is sleeved on the sliding rod portion and the opposite ends respectively abut against the PCB board and the step.

[0015] Furthermore, the movable rod is a big-head bolt, the screw section of the big-head bolt constitutes the sliding rod portion and the big head portion constitutes the pressing portion, and a ball nut made of an electrically insulating material is threadedly connected to the bottom end of the big-head bolt, and the end surface of the ball nut close to one end of the big head constitutes the step and the other end is a convex semi-spherical surface for correspondingly abutting the tank body.

[0016] Furthermore, the elastic control element is a spring sheet, one end of which is fixed to the box body, and the other end is fixed to the conductive part, or the spring sheet itself is made of conductive material and constitutes the conductive part at the same time, and the middle part of the spring sheet extends from the through hole to the outside of the box body to elastically abut against the tank body.

[0017] Furthermore, the mounting assembly includes an elastic barb for hooking on the rivet groove of the pull ring and limiting barbs respectively arranged on both sides of the elastic barb for hooking on opposite side edges of the pull ring.

[0018] Furthermore, the box body includes a bottom plate and a cover shell fixed to the bottom plate with a buckle cover, the elastic barb, the limiting barb and the through hole are all formed on the bottom plate, and the sound outlet hole is arranged on the cover shell.

[0019] Furthermore, the box body is provided with a plurality of bottom plates which are selectively assembled onto the cover shell in actual application, and the distances between the two limiting barbs on different bottom plates are different to correspond to the size of one pull ring.

[0020] On the other hand, in order to solve the above-mentioned further technical problems, the embodiment of the utility model provides the following technical solutions: a can with a music playing device, comprising a can and a music playing device assembled on the can cover of the can, wherein the music playing device is the music playing device as described above.

[0021] After adopting the above technical scheme, the embodiment of the utility model has at least the following beneficial effects: the embodiment of the utility model fixes the box body of the music player device to the pull ring of the can detachably through the mounting assembly, and the audio player module is encapsulated in the box body, so that the user can flexibly assemble the music player device to the pull rings of different cans, and can realize the separate manufacturing and sales of the music player device and the can, which is more flexible; in addition, a switch assembly is added to the audio player module, and when the music player device is fixed to the pull ring of the can, one end of the elastic control element passes through the through hole at the bottom of the box body and elastically presses against the can. On the can body of the can, the elastic control element causes the conductive element to move to a disconnected position where the first contact and the second contact are disconnected under the action of the reverse thrust of the can body, so that the conductive element cannot contact and connect the first contact and the second contact; when the user pulls the pull ring to open the can, the distance between the bottom surface of the box body and the outer surface of the can cover increases, and the reverse thrust applied by the can body to the elastic control element disappears, and then the elastic control element drives the conductive element to move to a conductive position where the first contact and the second contact are connected. At this time, the power supply circuit between the battery and the audio player device is connected to trigger the music playback of the audio player device, and the processing and use are very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The utility model is a schematic diagram of the disassembly structure of an optional embodiment of a can with a music player.

[0023] Figure 2 The utility model is a schematic diagram of the assembly structure of an optional embodiment of a can with a music player.

[0024] Figure 3 This is a principle block diagram of a battery and an audio player power supply circuit of an optional embodiment of the utility model of a can with a music player.

[0025] Figure 4 This is a schematic structural diagram of the cooperation between the box body and the pull ring of an optional embodiment of the utility model of a can with a music player.

[0026] Figure 5 This is a schematic cross-sectional structure diagram of an optional embodiment of a can with a music player of the utility model when the pull ring is not pulled up.

[0027] Figure 6 This is a schematic diagram of the cross-sectional assembly structure of an optional embodiment of a can with a music player of the utility model when the pull ring is pulled up.

[0028] Figure 7 The present invention is a schematic cross-sectional structure diagram of a switch assembly of another optional embodiment of a can with a music player of the present invention.

[0029] Figure 8 The present invention is a schematic cross-sectional structure diagram of a switch assembly of another optional embodiment of the soda can with a music player of the present invention. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention. In addition, the embodiments and features in the embodiments of the present application may be combined with each other without conflict.

[0031] like Figure 1-Figure 6 As shown, an optional embodiment of the utility model provides a music playing device 3 for use with a can 1, comprising a box body 30 and an audio playing module 32 encapsulated in the box body 30, a sound outlet 301 is provided on the top of the box body 30, and the audio playing module 32 comprises an audio playing device 321 arranged opposite to the sound outlet 301 and a battery 323 for supplying power to the audio playing device 321;

[0032] The outer side surface of the bottom plate 302 of the box body 30 is provided with a mounting assembly 303 for detachably mounting the box body 30 on the pull ring 10 of the can 1, and the bottom plate 302 is also provided with a through hole 304;

[0033] The audio playback module 32 also includes: a switch component 325 arranged in the power supply circuit between the battery 323 and the audio playback device 321, the switch component 325 includes a first contact 325a electrically connected to the battery 323, a second contact 325b electrically connected to the audio playback device 321, a conductive member 325c for electrically connecting the first contact 325a and the second contact 325b, and an elastic control element 325d fixed to the conductive member 325c and used to apply elastic force to keep the conductive member 325c in a conductive position correspondingly abutting and conducting the first contact 325a and the second contact 325b, one end of the elastic control element 325d extends from the through hole 304 to the outside of the box body 30 to elastically press on the can body 12 of the can 1, and under the action of the reverse thrust of the can body 12, the conductive member 325c is driven to move to a disconnected position where the first contact 325a is disconnected from the second contact 325b.

[0034] In the embodiment of the utility model, the box body 30 of the music player 3 is detachably fixed to the pull ring 10 of the can 1 through the mounting assembly 303, and the audio player module 32 is encapsulated in the box body 30, so that the user can flexibly assemble the music player 3 to the pull ring 10 of different cans, and can realize the separate manufacturing and sales of the music player 3 and the can 1, which is more flexible; in addition, the audio player module 32 is additionally provided with a switch assembly 325, when the music player 3 is fixed to the pull ring 10 of the can 1, one end of the elastic control element 325d passes through the through hole 304 at the bottom of the box body 30 and is pressed against the outer surface of the can body 12, and the elastic control element 325d acts on the reverse thrust of the can body 12 The conductive member 325c is forced to move to the disconnected position where the first contact 325a and the second contact 325b are disconnected, so that the conductive member 325c cannot contact and connect the first contact 325a and the second contact 325b; when the user pulls the pull ring 10 to open the can 1, the distance between the bottom surface of the box body 30 and the outer surface of the can body 12 increases, and the reverse thrust exerted by the can body on the elastic control element 325d disappears, and then the elastic control element 325d drives the conductive member 325c to move to the conductive position where the first contact 325a and the second contact 325b are connected. At this time, the power supply circuit between the battery 323 and the audio player 321 is connected to trigger the music playback of the audio player 321, which is very convenient to process and use.

[0035] In an optional embodiment of the present invention, Figure 1 , Figure 5 and Figure 6 As shown, the audio playback module also includes a PCB board 327 fixed in the box body 30, and the first contact 325a and the second contact 325b are both arranged on the PCB board 327. In this embodiment, by setting the PCB board 327, the first contact 325a and the second contact 325b can be carried and positioned, and the line can be laid conveniently to achieve circuit connectivity. In a specific implementation, the first contact 325a and the second contact 325b can be a conductive sheet welded on the PCB board 327, or a metal plating printed on the PCB board 327.

[0036] In an optional embodiment of the present invention, Figure 1 , Figure 5 and Figure 6 As shown, the elastic control element 325d includes:

[0037] Corresponding to the movable rod 3250 that passes through the through hole 304 and has one end extending out of the box body 30 to abut against the tank body 12, the movable rod 3250 is provided with the conductive member 325c at one end located in the box body 30, and the movable rod 3250 is also provided with an anti-disengagement stop portion for preventing the movable rod 3250 from completely sliding out of the box body 30 through the through hole 304; and an elastic element 3252, one end of which is relatively fixed to the box body 30 and the other end abuts against the movable rod 3250 to push the movable rod 3250 to move axially so that the conductive member 325c is maintained in the conducting position.

[0038] In this embodiment, the elastic control element 325d includes a movable rod 3250 and an elastic element 3252. The elastic element 3252 is used to apply elastic force to the movable rod 3250 to cause the movable rod 3250 to slide relatively, thereby movably contacting the first contact 325a and the second contact 325b. The assembly is very convenient, the circuit is connected, and the implementation is convenient.

[0039] In an optional embodiment of the present invention, Figure 1 , Figure 5 and Figure 6 As shown, a sliding hole 3270 is correspondingly opened on the PCB board 327, the first contact 325a and the second contact 325b are correspondingly arranged on the opposite sides of the sliding hole 3270, the movable rod 3250 is T-shaped and includes a sliding rod portion 3250a correspondingly penetrated in the sliding hole 3270 and the bottom end of which extends from the through hole 304 on the bottom plate 302 to the outside of the box body 30, and a pressing portion 3250b transversely arranged at the top of the sliding rod portion 3250a, the pressing portion 3250b, the first contact 325a and the second contact 325b are all located on the same side of the PCB board 327, and the pressing portion 3250b is arranged on the same side of the PCB board 327. The width of the pressing portion 3250b is greater than the aperture of the sliding hole 3270, and the pressing portion 3250b also constitutes an anti-slip stop portion, the conductive member 325c is fixed to the side surface of the pressing portion 3250b facing the PCB board 327, or the pressing portion 3250b is made of conductive material and the conductive member 325c is constituted by the pressing portion 3250b, and a protruding step 3250c is formed on the side of the sliding rod portion 3250a near the bottom end, and the elastic element 3252 is a spring which is sleeved on the sliding rod portion and abuts against the PCB board 327 and the step 3250c at two opposite ends.

[0040] In this embodiment, a sliding hole 3270 is provided on the PCB board 327, and the sliding rod portion 3250a of the movable rod 3250 is inserted into the sliding hole 3270. The sliding hole 3270 can effectively guide the sliding of the movable rod 3250 relative to the PCB board 327. At the same time, the elastic element 3252 is a spring sleeved on the sliding rod portion 3250a, and the sliding rod portion 3250a can effectively limit the spring. At the same time, the pressing portion 3250b of the movable rod 3250 is used to press the first contact 325a and the second contact 325b to ensure that the conductive member 325c is in full contact with the first contact 325a and the second contact 325b to achieve conduction.

[0041] In an optional embodiment of the present invention, Figure 1 , Figure 4-Figure 6 As shown, the movable rod 3250 is a big-head bolt, the screw section of the big-head bolt constitutes the sliding rod portion 3250a and the big head portion constitutes the pressing portion 3250b, and a ball nut 3250d made of an electrically insulating material is threadedly connected to the bottom end of the big-head bolt, and the end face of the ball nut 3250d close to one end of the big head constitutes the step 3250c and the other end is a convex semi-spherical surface for correspondingly abutting the tank body 12. In this embodiment, the movable rod 3250 is a big-head bolt, which is easy to obtain. The big head of the big-head bolt made of metal material can be directly used as the pressing part 3250b, and no additional assembly is required, which is very convenient. Moreover, by setting a ball nut, it can be in stable pressing contact with the surface of the tank body 12. Moreover, by flexibly screwing the ball nut to adjust the compression amount of the spring, the height of the pull ring 10 to pull up and trigger the music playback of the audio playback device 321 can be set. In addition, the ball nut 3250d is made of electrically insulating material to avoid leakage and increase the service life of the battery 323.

[0042] In an optional embodiment of the present invention, Figure 7 and Figure 8As shown, the elastic control element 325d is a spring, one end of which is fixed on the box body 30, and the other end is fixed with the conductive member 325c or the spring itself is made of conductive material and constitutes the conductive member 325c at the same time, and the middle part of the spring extends from the through hole 304 to the outside of the box body 30 to elastically abut against the tank body 12. In this embodiment, an elastic body in the form of a spring is used as the elastic control element 325d, and the middle part extends from the through hole 304 to the outside of the box body 30 to elastically abut against the tank body 12. When the reverse thrust of the tank body 12 on the spring disappears, the spring can also automatically reset to make the first contact 325a and the second contact 325b conductive. It can be understood that in the embodiment where the spring itself is made of conductive material and also constitutes the conductive member 325c, the surface of the exposed part of the spring passing through the through hole 304 is preferably covered with a layer of electrical insulating material to avoid leakage and affect the service life of the battery 323.

[0043] In specific implementation, Figure 7 As shown, one end of the spring sheet can be fixed on the box body 30, and the other end is provided with the conductive member 325c. The elastic force of the spring sheet itself can ensure that the conductive member 325c is located in the conductive position and the first contact 325a and the second contact 325b are conductively connected accordingly. The middle section of the spring sheet extends from the through hole 304. When assembled to the can 1, the middle section of the spring sheet abuts against the can body 12 and is pushed back by the can body 12, so that the conductive member 325c moves to the disconnected position and is out of contact with the first contact 325a and the second contact 325b; or as shown in FIG. Figure 8 As shown, the spring sheet can be made of conductive material, and one end of the spring sheet is relatively fixed and electrically connected to the first contact 325a, while the other end contacts the second contact 325b under the elastic force of the spring sheet itself. When the middle section of the spring sheet is pushed back by the tank body 12, only the end in contact with the second contact 325b will move and leave the second contact 325b.

[0044] In an optional embodiment of the present invention, Figure 1 , Figure 4-Figure 6 As shown, the mounting assembly 303 includes an elastic barb 303a for hooking on the rivet groove 101 of the pull ring 10 and a limiting barb 303b respectively arranged on both sides of the elastic barb 303a for the opposite sides of the pull ring 10. Specifically, since the pull ring 10 of the can 1 is usually fastened to the can lid 12 of the can 1 by rivets, the part of the pull ring 10 for forming the rivet usually has a rivet groove 101. In this regard, in this embodiment, the elastic barb 303a on the box body 30 is directly hooked with the rivet groove 101 on the pull ring 10 for positioning, and at the same time, the limiting barb 303b is hooked on the opposite sides of the pull ring 10 to prevent the elastic barb 303a from sliding in the rivet groove 101 after hooking on the rivet groove 101, so as to achieve stable positioning.

[0045] In an optional embodiment of the present invention, Figure 1 , Figure 4-Figure 6 As shown, the box body 30 also includes a cover shell 306 that is fixed to the bottom plate 302 with a buckle cover, the elastic hook 303a, the limit hook 303b and the through hole 304 are all formed on the bottom plate 302, and the sound outlet 301 is provided on the cover shell 306. In this embodiment, the box body 30 is formed by the bottom plate 302 and the cover shell 306 being buckled and fixed to each other, which effectively prevents external dust particles and liquids from entering the interior and contacting and interfering with the audio playback module 32, and has strong protectiveness. In specific implementations, there are many ways to achieve the buckled and fixed assembly of the bottom plate 302 and the cover shell 306, such as: snap connection, screw locking, etc.; in the example Figure 1 In the embodiment of the present invention, screw locking is adopted.

[0046] In an optional embodiment of the utility model, the box body 30 is configured with multiple bottom plates 302, which are selected to be assembled on the cover 306 in actual application, and the two limiting barbs 303b on different bottom plates 302 have different spacings and are correspondingly adapted to the size of a pull ring 10. In this embodiment, in order to adapt to pull rings 10 of different sizes, the box body 30 is designed with multiple bottom plates 302, and the spacing between the two limiting barbs 303b on each bottom plate 302 is adapted to a pull ring 10 of one size, thereby improving compatibility.

[0047] In specific implementation, Figure 1 As shown, the battery 323 is a button battery. In this embodiment, by setting the battery 323 as a button battery, it is beneficial to reduce the overall volume of the device and save costs.

[0048] On the other hand, Figure 1-Figure 6 As shown, the embodiment of the utility model further provides a can with a music player 3, comprising a can 1 and a music player 3 assembled on the can lid of the can 1, wherein the music player 3 is the music player as described above. In this embodiment, the music player 3 described above can be used to realize the paired assembly of the music player with different cans, and the processing is also more convenient.

[0049] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, which all belong to the protection scope of the utility model.

Claims

1. A music playing device used with a can, comprising a box body and an audio playing module encapsulated in the box body, a sound outlet hole is provided on the box wall of the box body, the audio playing module comprises an audio playing device arranged opposite to the sound outlet hole and a battery for powering the audio playing device, characterized in that: The outer surface of the bottom plate of the box body is provided with a mounting assembly for detachably mounting the box body on the pull ring of the can, and the bottom plate is also provided with a through hole; The audio playback module also includes a switch component arranged in a power supply circuit between the battery and the audio playback device, the switch component includes a first contact electrically connected to the battery, a second contact electrically connected to the audio playback device, a conductive member for electrically connecting the first contact and the second contact, and an elastic control element fixed to the conductive member and used to apply elastic force to keep the conductive member in a conductive position where the first contact and the second contact are correspondingly abutted and conductive, one end of the elastic control element extends from the through hole to the outside of the box body to elastically press against the can body of the can, and under the action of the reverse thrust of the can body, the conductive member is driven to move to a disconnected position where the first contact is disconnected from the second contact.

2. The music playing device used with a can as claimed in claim 1, characterized in that: The audio playback module further includes a PCB board fixed in the box body, and the first contact point and the second contact point are both arranged on the PCB board.

3. The music playing device used with a can as claimed in claim 2, characterized in that: The elastic control element comprises: A movable rod correspondingly penetrates the through hole and has one end extending out of the box body to abut against the tank body, the conductive member is disposed at one end of the movable rod located in the box body, and the movable rod is also provided with an anti-slip stopper for preventing the movable rod from completely sliding out of the box body through the through hole; and An elastic element has one end fixed relatively to the box body and the other end abutting against the movable rod to push the movable rod to move along the axial direction so as to keep the conductive member at the conducting position.

4. The music playing device used with a can as claimed in claim 3, characterized in that: A sliding hole is correspondingly opened on the PCB board, the first contact and the second contact are correspondingly arranged on opposite sides of the sliding hole, the movable rod is T-shaped and includes a sliding rod portion correspondingly penetrated in the sliding hole and the bottom end of which extends from the through hole on the bottom plate to the outside of the box body, and a pressing portion laterally arranged at the top end of the sliding rod portion, the pressing portion, the first contact and the second contact are all located on the same side of the PCB board, the pressing portion has a width greater than the aperture of the sliding hole and the pressing portion also constitutes an anti-slip stop portion, the conductive member is fixed to a side surface of the pressing portion facing the PCB board or the pressing portion is made of conductive material and the conductive member is constituted by the pressing portion, the side surface of the sliding rod portion is formed with an outwardly convex step near the bottom end, and the elastic element is a spring which is sleeved on the sliding rod portion and the opposite ends respectively abut against the PCB board and the step.

5. The music playing device used with cans as claimed in claim 4, characterized in that: The movable rod is a big-head bolt, the screw section of the big-head bolt constitutes the sliding rod part and the big head constitutes the pressing part, a ball nut made of an electrically insulating material is threaded on the bottom end of the big-head bolt, the end surface of the ball nut close to the big head constitutes the step and the other end is a convex semi-spherical surface for correspondingly abutting the tank body.

6. The music playing device used with a can as claimed in claim 1 or 2, characterized in that: The elastic control element is a spring, one end of which is fixed to the box body, and the other end is fixed to the conductive part, or the spring itself is made of conductive material and constitutes the conductive part at the same time. The middle part of the spring extends from the through hole to the outside of the box body to elastically abut against the tank body.

7. The music playing device used with a can as claimed in claim 1 or 2, characterized in that: The mounting assembly comprises an elastic barb for hooking on the rivet groove of the pull ring and limiting barbs respectively arranged on both sides of the elastic barb for hooking on the opposite side edges of the pull ring.

8. The music playing device used with a can as claimed in claim 7, characterized in that: The box body also includes a cover shell with a buckle cover fixed on the bottom plate, the elastic barb, the limit barb and the through hole are all formed on the bottom plate, and the sound outlet hole is arranged on the cover shell.

9. The music playing device used with a can as claimed in claim 8, characterized in that: The box body is configured with a plurality of bottom plates which are selectively assembled onto the cover shell in actual application, and the distances between the two limiting barbs on different bottom plates are different to correspond to the size of a pull ring.

10. A can with a music player, comprising a can and a music player assembled on the can cover of the can, characterized in that: The music playing device is the music playing device as described in any one of claims 1-8.

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