CN206894837U - A kind of microphone holder - Google Patents

Abstract

The utility model embodiment provides a kind of microphone holder, is related to multimedia technology field, to solve the problems, such as that microphone holder function is single.Wherein, the microphone holder includes：Expansion link, mobile terminal fixed structure and microphone fixed structure；The mobile terminal fixed structure is movably installed at one end of the expansion link, the microphone fixed structure is movably installed at the other end of the expansion link, voice band line is provided with the expansion link, first joint of the voice band line extends to the mobile terminal fixed structure, and it is detachably connected in the socket of the mobile terminal on the mobile terminal fixed structure, second joint of the voice band line extends to the microphone fixed structure, and it is detachably connected in the first socket of the microphone on the microphone fixed structure, second socket of the microphone is used to connect audio frequency apparatus.The microphone holder that the utility model embodiment is provided is applied on microphone.

Description

Microphone bracket

Technical Field

The utility model relates to a multi-media technical field especially relates to a microphone support.

Background

At present, the types of microphone supports are various, and requirements of different crowds and different occasions can be met.

For example, the floor microphone bracket is more suitable for occasions such as a stage, and the floor microphone bracket has enough placing space due to the larger stage and is beneficial to a singer to complete action performance better; for another example, a desktop microphone stand, which can be placed on a desktop, is suitable for singing or speaking with less action performance; for another example, the microphone stand can be suspended in a place with a small horizontal area, and the microphone stand occupies a small area, has low requirements on a placement environment, does not need a large flat horizontal plane, and has a wide application range.

The problem of placing the microphone can be solved to above-mentioned several types of microphone supports, does not need the user to hold the microphone, has brought very big convenience for the user, but the not enough, and the function that current microphone support can realize is only placing of microphone, and can't adjust the angle of microphone as required, leads to the function singleness of microphone support, can't satisfy user's more demands.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a technical problem that will solve provides a microphone support to solve the problem of microphone support function singleness.

In order to solve the above problem, the utility model discloses a microphone bracket, include: the mobile terminal comprises a telescopic rod, a mobile terminal fixing structure and a microphone fixing structure; mobile terminal fixed knot constructs movably to be installed the one end of telescopic link, microphone fixed knot constructs movably to be installed the other end of telescopic link, be provided with the audio circuit in the telescopic link, the first joint of audio circuit extends to mobile terminal fixed knot constructs, and detachably connects and is in the last mobile terminal's of mobile terminal fixed knot structure socket, the second joint of audio circuit extends to microphone fixed knot constructs, and detachably connects in the first socket of the last microphone of microphone fixed knot constructs, the second socket of microphone is used for connecting audio equipment.

Compared with the prior art, the embodiment of the utility model provides an including following advantage:

the utility model discloses microphone support includes mobile terminal fixed knot constructs, can be used to place mobile terminal, still includes microphone fixed knot structure, can be used to place the microphone, still includes the telescopic link between the two, distance between adjustable mobile terminal and the microphone. The user is using this microphone support, except utilizing microphone fixed knot to construct the support microphone, still can utilize the mobile terminal on the mobile terminal fixed knot structure to carry out the auto heterodyne, and simultaneously, be provided with in the telescopic link because of the audio circuit, the first joint joinable of audio circuit is on mobile terminal, its second articulate is on the microphone, thereby sound information accessible audio circuit in the video that mobile terminal shot transmits the first socket to the microphone, thereby transmit to audio equipment through the second socket of microphone again, the user can hear the sound effect of shooting from audio equipment, and then learn and shoot quality etc..

In addition, the mobile terminal fixing structure and the microphone fixing structure are movably mounted on the telescopic rod, so that the shooting angle or the microphone placing angle can be adjusted in real time, and more requirements of a user can be met.

It can be seen that the embodiment of the present invention provides a microphone holder, which can not only support a microphone, but also be used for shooting, and simultaneously, the shooting angle and the placing angle of the microphone can be adjusted in real time, thereby enriching the functions that can be realized by the microphone holder, solving the problem of single function of the microphone holder, and bringing greater satisfaction to users.

Drawings

Fig. 1 is a first structural diagram of a microphone stand according to an embodiment of the present invention;

fig. 2 is a first structural diagram of a microphone fixing structure according to an embodiment of the present invention;

fig. 3 is a second structural diagram of the microphone fixing structure according to the embodiment of the present invention;

fig. 4 is a third structural diagram of the microphone fixing structure according to the embodiment of the present invention;

fig. 5 is a fourth structural view of the microphone fixing structure according to the embodiment of the present invention;

fig. 6 is a fifth structural view of the microphone fixing structure according to the embodiment of the present invention;

fig. 7 is a structural view of the shock-absorbing fixing frame according to the embodiment of the present invention;

fig. 8 is a structural diagram of a mobile terminal fixing structure according to an embodiment of the present invention;

fig. 9 is a second block diagram of a microphone stand according to an embodiment of the present invention;

fig. 10 is a third structural diagram of a microphone stand according to an embodiment of the present invention.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 1, the microphone stand in the present embodiment includes: the telescopic rod 10, the mobile terminal fixing structure 20 and the microphone fixing structure 30; wherein,

the one end at telescopic link 10 is installed movably to mobile terminal fixed knot structure 20, the other end at telescopic link 10 is installed movably to microphone fixed knot structure 30, be provided with the audio circuit in the telescopic link 10, the first joint of audio circuit extends to mobile terminal fixed knot structure 20, and in detachably connects the mobile terminal's on mobile terminal fixed knot structure 20 socket, the second joint of audio circuit extends to microphone fixed knot structure 30, and detachably connects in the first socket of the microphone on microphone fixed knot structure 30, the second socket of microphone is used for connecting audio equipment.

In this embodiment, the microphone stand mainly includes three major parts:

the first part is a microphone fixing structure 30, the microphone fixing structure 30 is used for placing or supporting a microphone, the microphone fixing structure 30 is movably connected with the telescopic rod 10, and in the using process, a user can adjust the angle of the microphone fixing structure 30 according to actual needs so as to enable the microphone to be at a proper angle.

The second part is a mobile terminal fixing structure 20, the mobile terminal fixing structure 20 is used for placing or supporting a mobile terminal, the structure is arranged in a microphone bracket, the shooting function of the microphone bracket is increased, in addition, the mobile terminal fixing structure 20 and the telescopic rod 10 are also movably connected, and in the using process, a user can adjust the angle of the mobile terminal fixing structure 20 according to actual needs so as to determine a proper shooting angle.

The third part is a telescopic rod 10, the telescopic rod 10 can adjust the distance between the microphone fixing structure 30 and the mobile terminal fixing structure 20, that is, the distance between the microphone and the mobile terminal, and the telescopic rod 10 can also adjust the shooting focal length. Be provided with the audio circuit in the telescopic link 10, the both ends of audio circuit are first joint and second joint respectively, the first joint can be inserted in mobile terminal's the socket, the second connects in the first socket that can insert the microphone, thereby sound information accessible audio circuit in the video that mobile terminal shot transmits to the microphone, still be provided with the second socket on the microphone, behind the audio equipment is connected to the second socket, the second socket can be with the sound information transmission of first socket to audio equipment, thereby audio equipment broadcast received sound information, make the user can clearly hear the sound effect of shooting, thereby can change the sound effect according to actual demand.

Compared with the prior art, the microphone support has the advantages that the shooting function is added, the shot sound effect can be identified and adjusted on the basis of the shooting function, the functions of adjusting the mobile terminal and the angle of the microphone are added, and accordingly the problem of single function of the microphone support is solved, the functions of the microphone support are enriched, more requirements of users are met, and more experiences are brought to the users.

As a reference, the audio device may be preferably a headphone, which has less noise in playing effect and can clearly hear the shot sound effect.

Referring to fig. 2, in the embodiment of the present invention, in order to realize the feature that the microphone fixing structure 30 is movably installed at the end of the telescopic rod 10, the microphone fixing structure 30 may include an adjusting component 31 and a shock absorbing fixing frame 32, the adjusting component 31 is installed at the corresponding end of the telescopic rod 10, the shock absorbing fixing frame 32 is installed on the adjusting component 31, and the shock absorbing fixing frame 32 is used for placing the microphone 100.

The adjusting assembly 31 is a movable assembly to movably mount the microphone fixing structure 30 on the telescopic rod 10, and the damping fixing frame 32 is used for placing the microphone 100, so as to achieve a damping effect.

Preferably, the shockproof fixing frame 32 is made of plastic, wherein the plastic includes Acrylonitrile-Styrene-Butadiene copolymer (ABS) and Polycarbonate (PC).

As can be appreciated, the embodiments of the present invention provide the following examples to illustrate the structure of the adjustment assembly 31.

Example 1

With continued reference to fig. 2, the adjustment assembly 31 may include a first connecting rod 311, a rotating member 312, and a mounting handle 313; one end of the first connecting rod 311 is fixedly mounted at the end of the telescopic rod 10, a first through hole is radially formed in the other end of the first connecting rod 311, a first through groove 3121 is formed in one end of the rotating member 312, the opening direction of the first through groove 3121 faces away from the opposite end of the rotating member 312, a second through hole is respectively formed in two opposite groove walls of the first through groove 3121, the corresponding end of the first connecting rod 311 is located in the first through groove 3121, one end of the mounting handle 313 sequentially penetrates through the second through hole, the first through hole and the other second through hole, and the other end of the mounting handle 313 is adjustably mounted at the outer side of the rotating member 312, so that the rotating member 312 rotates around the mounting handle 313; the shock-absorbing mount 32 is installed at the other end of the rotary member 312.

Referring to fig. 3, in this example, assuming that the straight line of the mounting handle 313 is the X axis, the rotating member 312 can rotate around the X axis, and the arc arrow in the figure is the rotating direction, so that the rotating member 312 can drive the shock absorbing fixing frame 32 mounted at the end thereof to rotate around the X axis, and the angle of the microphone 100 placed on the shock absorbing fixing frame 32 changes.

According to the structure of the adjusting assembly 31, the first connecting rod 311 and the rotating member 312 are installed together by the installation handle 313, and a certain installation gap is left in the connection among the installation handle 313, the first connecting rod 311 and the rotating member 312, so as to realize the movable function of the adjusting assembly 31. Wherein, the mounting handle 313 plays the main adjusting role, and the user can adjust the size of the mounting gap by controlling the mounting handle 313. For example, the mounting handle 313 may be screwed on the outer side of the rotating member 312, so that the connection relationship between the three can be adjusted according to the tightness of the screwing. Such as: when the angle of the microphone 100 needs to be adjusted, the installation clearance reserved for the tightness degree of screwing the installation handle 313 needs to ensure that the rotating piece 312 can rotate around the installation handle 313; for another example: after the angle of the microphone 100 reaches the ideal position, the installation gap reserved by the tightness degree of the screwing device of the installation handle 313 needs to ensure that the connection between the first connecting rod 311 and the rotating member 312 is stable, and the corresponding installation gap at this time is smaller.

In particular, in the adjusting assembly 31 of the first example, the rotating member 312 can rotate around the mounting handle 313 within an angle range of 0 ° to 360 °, and this range can realize flexible adjustment of the angle of the microphone 100.

Example two

Referring to fig. 4, in the first example, the adjusting assembly 31 may further include a rotating shaft 314, the rotating shaft 314 being perpendicular to an end surface of the rotating member 312 where the shock-absorbing fixing frame 32 is installed, one end of the rotating shaft 314 being installed on the rotating member 312, and the shock-absorbing fixing frame 32 being rotatably installed at the other end of the rotating shaft 314, so that the shock-absorbing fixing frame 32 rotates around the rotating shaft 314.

In the second example, a rotating shaft 314 is added on the first example, and the shock absorbing fixing frame 32 is mounted on the rotating member 312 through the rotating shaft 314. Assuming that the straight line of the rotating shaft 314 is the Y-axis, the shock-absorbing mount 32 can rotate around the X-axis and also rotate around the Y-axis, so that two-dimensional rotation is realized, and the shock-absorbing mount 32 can reach more angles.

In particular, in this example, the angle range of the rotation of the shock-absorbing fixing frame 32 around the rotation shaft 314 is 0 ° to 360 °, and in combination with the angle range of the rotation in the first example, the shock-absorbing fixing frame 32 can be rotated from multiple directions, and the flexibility is better.

It should be noted that, the damping mount 32 only rotates around the Y axis is also one of the solutions in the present embodiment, and the description thereof is omitted.

It should be noted that, in the first and second examples, the first connecting rod 311 may be a straight rod (as shown in fig. 2 and 3) aligned with the telescopic rod 10, and the X-axis is perpendicular to the telescopic rod 10, and the shock-absorbing fixing frame 32 rotates in a plane parallel to the telescopic rod 10.

Referring to fig. 5, the first connecting rod 311 may also be an L-shaped rod, wherein the part of the L-shaped rod connected to the telescopic rod 10 is parallel to the telescopic rod 10, the part connected to the rotating member 312 is perpendicular to the telescopic rod 10, the X-axis is parallel to the telescopic rod 10, and the shock-absorbing fixing frame 32 rotates in a plane perpendicular to the telescopic rod 10.

Example three

Referring to fig. 6, the adjusting assembly 31 may include a second connecting rod 315, a rotating sphere 316, a third connecting rod 317 and a fixing rod 318, one end of the second connecting rod 315 is fixedly mounted at the end of the telescopic rod 10, the other end of the second connecting rod 315 is provided with a second through groove, an opening direction of the second through groove faces away from an opposite end of the second connecting rod 315, a groove wall inner side of the second through groove is hemispherical, a hemispherical spherical surface faces outward, the rotating sphere 316 is movably clamped in the second through groove, one end of the third connecting rod 317 is connected to the rotating sphere 316, the third connecting rod 317 moves in an opening range of the second through groove, and the other end of the third connecting rod 317 is connected to the fixing rod 318; the shock mount 32 is mounted on the fixing rod 318.

In the third example, the rotary sphere 316 can rotate in the second through groove 3151, so that the third connecting rod 317 connected to the rotary sphere 316 can indirectly drive the shock-absorbing fixing frame 32 to change the angle through the rotation of the rotary sphere 316, and according to this principle, the user can complete the angle adjustment of the shock-absorbing fixing frame 32 as long as the user has controlled the movable third connecting rod 317 to move within the opening range of the second through groove 3151. Here, since the third connecting rod 317 has a small rod diameter in order to achieve the effect that the third connecting rod 317 can move within the opening range of the second through groove 3151, in order to reinforce the connection relationship between the adjusting assembly 31 and the shock-absorbing fixing frame 32, a fixing rod 318 for stability is provided, wherein the material of the fixing rod 318 may be plastic.

In particular, the rotating ball 316 can rotate in the second through slot at any angle, so that the shock-absorbing fixing frame 32 can achieve an omnidirectional angle adjustment.

Through above three examples, can see, the utility model provides an in the embodiment of the utility model discloses microphone support can carry out the regulation of angle to the microphone in microphone fixed knot constructs 30 from a plurality of azimuths to satisfy the all-round angle modulation of microphone.

Referring to fig. 7, preferably, the shock-absorbing fixing frame 32 may include a sleeve 321, at least two sets of shock-absorbing clamping members 322 are disposed inside the sleeve 321, each set of shock-absorbing clamping members 322 includes a plurality of elastic cords, the elastic cords are wound in a predetermined manner to form a groined structure, and a hollow portion of the groined structure is used for clamping the microphone.

In the above-mentioned shock-absorbing fixing frame 32, the elasticity of the elastic cord is utilized to achieve the shock-absorbing effect, and the two sets of shock-absorbing clamping pieces 322 clamp the microphone to ensure the balance of the microphone and ensure the stable placement.

Preferably, the elastic cord may be a rubber ring, in particular a silicone rubber ring.

Further, the microphone bracket may further include a blowout prevention net, the blowout prevention net is disposed on the blowout prevention bracket, a connector is disposed outside the sleeve 321, and the blowout prevention bracket is connected to the sleeve 321 through the connector.

The position of the blowout prevention support can be adjusted according to the length of different microphones, and the blowout prevention net is required to be located at the upper end of the microphone to play a blowout prevention role.

Referring to fig. 8, in order to complete the microphone bracket according to the embodiment of the present invention, the mobile terminal fixing structure 20 may include a fourth connecting rod 21, a second rotating member 22 (to distinguish from the rotating member 312), a second mounting handle 23 (to distinguish from the mounting handle 313), and a mobile terminal fixing frame 24; one end of the fourth connecting rod 21 is fixedly mounted at the end of the telescopic rod 10, the other end of the fourth connecting rod 21 is provided with a third through hole in the radial direction, the second rotating member 22 comprises a plurality of connecting plates arranged side by side, a fourth through hole is respectively formed in the same end of the plurality of connecting plates, the corresponding end of the fourth connecting rod 21 also comprises a plurality of connecting plates, each connecting plate of the fourth connecting rod 21 is correspondingly positioned between two connecting plates of the second rotating member 22, one end of the second mounting handle 23 penetrates through the plurality of fourth through holes and the third through hole, the other end of the second mounting handle 23 is adjustably mounted on the outer side of the second rotating member 22, so that the second rotating member 22 rotates around the second mounting handle 23, the mobile terminal fixing frame 24 is mounted at the other end of the second rotating member 22, and the mobile terminal fixing frame 24 is used for placing.

Through the elasticity degree of adjusting second installation handle 23, the installation clearance between adjustable fourth connecting rod 21, second rotating member 22 and the second installation handle 23 to reach under the different circumstances, second rotating member 22 can be rotatory around second installation handle 23, perhaps the effect that second rotating member 22 is firm. This satisfies both the adjustability of the mobile terminal holder 24 and the stability of the mobile terminal holder 24.

Preferably, the mobile terminal holder 24 may include two clamping portions and an adjustment portion between the two clamping portions.

The adjustment portion may be adjusted according to the size of the mobile terminal, ensuring that the two clamping portions may clamp the mobile terminal 200.

Preferably, the telescopic rod 10 may include a plurality of short pipes inserted into each other, the diameters of the plurality of short pipes inserted into each other are sequentially increased from inside to outside, a first end of each short pipe is movably clamped in a second end of an adjacent short pipe, the mobile terminal fixing structure 20 is movably installed at the second end of the short pipe with the smallest diameter of the telescopic rod 10, and the microphone fixing structure 30 is movably installed at the first end of the short pipe with the largest diameter of the telescopic rod 10; the first end of each stub is the end near the microphone holding structure 30 and the second end of each stub is the end near the mobile terminal holding structure 20.

Referring to fig. 9, when the short pipes are in the inserted state, the telescopic rod 10 is correspondingly in the contracted state; referring to fig. 10, when the short pipes are pulled out from the adjacent short pipes, the telescopic rod 10 is correspondingly in a stretching state, so that the telescopic rod 10 is stretched.

Preferably, the material of the telescopic rod 10 is stainless steel.

Preferably, the material of the mounting handle 313, the second mounting handle 23, the clamping portion, the first connecting rod 311, the second connecting rod 315, the third connecting rod 317 and the fourth connecting rod 21 may be plastic (ABS or PC) or metal.

To sum up, the user is using the utility model discloses microphone support in the embodiment can carry out K sings or live, and user one hand is holding microphone support, and the other hand can be liberated, accomplishes gesture or dancing or does other actions, is particularly suitable for the live user of cell-phone of present removal, can remove live. Meanwhile, the telescopic rod 10 of the mobile phone microphone support can be stretched, the angle between the mobile terminal and the microphone can be adjusted at any time, and the requirement of a user on the view finding focal length and the requirement of comfort are met.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the invention.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.

The microphone bracket provided by the present invention is described in detail above, and the principle and the implementation of the present invention are explained by applying specific examples, and the description of the above examples is only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims (10)

1. A microphone stand, comprising: the mobile terminal comprises a telescopic rod, a mobile terminal fixing structure and a microphone fixing structure;

mobile terminal fixed knot constructs movably to be installed the one end of telescopic link, microphone fixed knot constructs movably to be installed the other end of telescopic link, be provided with the audio circuit in the telescopic link, the first joint of audio circuit extends to mobile terminal fixed knot constructs, and detachably connects and is in the last mobile terminal's of mobile terminal fixed knot structure socket, the second joint of audio circuit extends to microphone fixed knot constructs, and detachably connects in the first socket of the last microphone of microphone fixed knot constructs, the second socket of microphone is used for connecting audio equipment.

2. The microphone bracket as claimed in claim 1, wherein the microphone fixing structure comprises an adjusting component and a shock-absorbing fixing frame, the adjusting component is mounted at the corresponding end of the telescopic rod, the shock-absorbing fixing frame is mounted on the adjusting component, and the shock-absorbing fixing frame is used for placing a microphone.

3. The microphone stand of claim 2, wherein the adjustment assembly includes a first connecting rod, a swivel, and a mounting handle; wherein,

one end of the first connecting rod is fixedly arranged at the end part of the telescopic rod, a first through hole is arranged at the other end of the first connecting rod in the radial direction, a first through groove is arranged at one end of the rotating part, the opening direction of the first through groove is opposite to the opposite end of the rotating part, a second through hole is respectively arranged on two opposite groove walls of the first through groove, the corresponding end of the first connecting rod is positioned in the first through groove, one end of the mounting handle sequentially penetrates through one second through hole, the first through hole and the other second through hole, and the other end of the mounting handle is adjustably arranged at the outer side of the rotating part so that the rotating part rotates around the mounting handle;

the shock absorption fixing frame is arranged at the other end of the rotating part.

4. A microphone stand according to claim 3, wherein the rotation of the rotation member about the mounting handle is in the range of 0 ° to 360 °.

5. The microphone bracket as defined by claim 3, wherein the adjusting assembly further comprises a rotating shaft perpendicular to an end surface of the rotating member on which the shock-absorbing fixing frame is mounted, one end of the rotating shaft being mounted on the rotating member, the shock-absorbing fixing frame being rotatably mounted on the other end of the rotating shaft so that the shock-absorbing fixing frame rotates around the rotating shaft.

6. The microphone stand according to claim 5, wherein the shock-absorbing fixing mount is rotated around the rotation axis in an angular range of 0 ° to 360 °.

7. The microphone stand according to claim 3, wherein the first connecting rod is a straight rod; or,

the first connecting rod is an L-shaped rod.

8. The microphone bracket as claimed in claim 2, wherein the adjusting assembly comprises a second connecting rod, a rotary sphere, a third connecting rod and a fixing rod, one end of the second connecting rod is fixedly mounted at the end of the telescopic rod, the other end of the second connecting rod is provided with a second through groove, the opening direction of the second through groove faces away from the opposite end of the second connecting rod, the inner side of the groove wall of the second through groove is hemispherical, the spherical surface of the hemispherical is outward, the rotary sphere is movably clamped in the second through groove, one end of the third connecting rod is connected to the rotary sphere, the third connecting rod moves in the opening range of the second through groove, and the other end of the third connecting rod is connected to the fixing rod;

the shock absorption fixing frame is installed on the fixing rod.

9. The microphone stand of claim 8, wherein the rotary sphere rotates within the second channel at any angle.

10. The microphone bracket as claimed in claim 2, wherein the shock-absorbing fixing frame comprises a sleeve, at least two sets of shock-absorbing clamping members are arranged inside the sleeve, each set of shock-absorbing clamping members comprises a plurality of elastic ropes, the elastic ropes are wound in a predetermined manner to form a groined structure, and the hollow part of the groined structure is used for clamping the microphone;

the microphone support further comprises a blowout prevention net, the blowout prevention net is arranged on the blowout prevention support, a second connecting piece is arranged on the outer side of the sleeve, and the blowout prevention support is connected with the sleeve through the second connecting piece.