CN112290988A

CN112290988A - WIFI communication equipment capable of increasing signal through-wall effect

Info

Publication number: CN112290988A
Application number: CN202011255343.4A
Authority: CN
Inventors: 孙玉处
Original assignee: Haining Jinpu Electronic Technology Co ltd
Current assignee: Haining Jinpu Electronic Technology Co ltd
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2021-01-29

Abstract

The invention discloses WIFI communication equipment capable of improving a signal through-wall effect, which comprises a base and a control body, the control body is fixedly arranged on the top surface of the base, the top surface of the base can be provided with a signal output device, the inner and the left side of the control body are provided with signal mechanisms which can amplify the electronic signals of the signal antenna, the signal mechanism comprises two fixed blocks which are vertically symmetrical and are fixedly arranged on the left side surface of the control body, a rotating shaft is rotatably arranged between the two fixed blocks, the invention can drive by the rotation of the spring and the power shaft, and uses the manual rotating trigger, so that the clockwork spring is contracted and pressurized, when hands are released, the power shaft can slowly rotate through the abutting effect of the clamping blocks, the power conversion effect is achieved under the effect of low cost, and the effect of reciprocating rotation is achieved by utilizing the turntable structure.

Description

WIFI communication equipment capable of increasing signal through-wall effect

Technical Field

The invention relates to the field of electronic communication equipment, in particular to WIFI communication equipment capable of improving a signal through-wall effect.

Background

The WIFI communication equipment is a wireless signal output device, signals can be continuously weakened when the wireless signals are long-distance, the wall penetrating effect is difficult to achieve, and the electronic equipment signals of a user are very difficult to obtain.

Disclosure of Invention

In order to solve the above problems, the embodiment designs a WIFI communication device capable of increasing the signal through-wall effect, which comprises a base and a control body, wherein the control body is fixedly arranged on the top surface of the base, a signal output device can be placed on the top surface of the base, signal mechanisms capable of amplifying electronic signals of a signal antenna are arranged in and on the left side of the control body, each signal mechanism comprises two fixed blocks which are vertically symmetrical and fixedly arranged on the left side surface of the control body, a rotating shaft is rotatably arranged between the two fixed blocks, a U-shaped block is fixedly arranged on the periphery of the rotating shaft, an elastic arc-shaped plate is fixedly arranged between the mutually close side surfaces of the U-shaped blocks, an aluminum sheet is fixedly arranged on the left side surface of the elastic arc-shaped plate, the signal antenna is positioned in the aluminum sheet, a control cavity with an opening facing left and two transmission cavities which are front and back symmetrical and have an, an adjusting shaft is rotatably arranged on the bottom wall of the control cavity, a power rotating disc is fixedly arranged on the top surface of the adjusting shaft, a connecting block is fixedly arranged on the right side surface of the U-shaped block, a telescopic connecting rod is hinged to the right side of the connecting block, a hinged cavity is formed in the telescopic connecting rod, the telescopic connecting rod is hinged to the top surface of the power rotating disc in the hinged cavity, two fixed columns which are symmetrical front and back are fixedly arranged on the left side surface of the control body, a pushing connecting rod is hinged to the bottom surfaces of the fixed columns, a pulley is rotatably arranged at the left end of the pushing connecting rod and abutted to the right side surface of the elastic arc-shaped plate, a connecting cavity is formed in the pushing connecting rod, a transmission screw rod is rotatably arranged between the front wall and the rear wall of the transmission cavity, a moving block is connected to the outer periphery of the transmission screw rod in a threaded manner, a power mechanism capable of providing power for the adjusting shaft is arranged in the base, the power mechanism comprises a power shaft, two limiting cavities which are symmetrical up and down are arranged in the base and communicated with each other, a spring cavity and an annular cavity are arranged in the base and communicated with each other, a gear cavity is arranged on the left side of the spring cavity, the power shaft penetrates through the limiting cavities, the annular cavity and the spring cavity and extends into the gear cavity, the right side surface of the power shaft is located outside, a trigger is fixedly arranged on the periphery of the power shaft located outside, a limiting screw rod is rotatably arranged between the left wall and the right wall of the limiting cavity, a sliding block is connected with the outer periphery of the limiting screw rod in a threaded manner and connected with the inner wall of the limiting cavity in a left-right sliding manner, and a clamping block is arranged on the inner wall of the limiting cavity in an up-down sliding manner, the clamp splice with it is equipped with the pull rod to articulate between the slider, clamp splice ability butt the power shaft, the periphery of restriction screw rod has set firmly the threading die, threading die extension is located the annular chamber, it is equipped with the annular wheel to rotate between the wall about the annular chamber, set firmly oblique tooth piece on the inner circle wall of annular wheel, oblique tooth piece can with the threading die meshing is located the clockwork spring intracavity the power shaft periphery has set firmly fixed disk and clockwork spring, the fixed disk with annular wheel fixed connection, the clockwork spring with the inner wall fixed connection in clockwork spring chamber.

Preferably, a reset spring is fixedly mounted between the right side face of the sliding block and the right wall of the limiting cavity, a gear shaft and a cross shaft are arranged on the left wall of the gear cavity in a rotating mode, a ratchet wheel group is arranged between the cross shaft and the power shaft in a power connection mode, a transmission gear is fixedly arranged on the periphery of the cross shaft, a driven gear is fixedly arranged on the periphery of the gear shaft, and the driven gear is meshed with the transmission gear.

Preferably, the regulation chamber has been seted up to the downside in control chamber, regulating spindle downside extension stretches into adjust the intracavity, and its bottom surface has set firmly the regulation carousel, adjust the chamber with it is equipped with the vertical axis to rotate between the gear chamber, the vertical axis with the transmission is connected between the gear shaft and is equipped with driven bevel gear group, the top surface of vertical axis has set firmly the transmission carousel, the diameter of transmission carousel is less than adjust the carousel, the articulated rack that is equipped with of top surface of adjusting the carousel, the diapire rotation of adjusting the chamber is equipped with the gyro wheel, the rack with adjust the carousel meshing, just the rack with gyro wheel sliding connection.

But preferably, the rectangle chamber has been seted up to the upside in control chamber, all rotate on the wall around the rectangle chamber and be equipped with adjusting screw, two adjusting screw thread is opposite, and mutual fixed connection, the roof in rectangle chamber rotates and is equipped with the minor axis, is located the rear side adjusting screw with the transmission is connected between the minor axis and is equipped with transmission bevel gear group, minor axis upside extension is located the external world, and its top surface has set firmly the knob, adjusting screw keeps away from rectangle chamber side extension is located the transmission intracavity, and with transmission intracavity wall rotates and is connected, is located the transmission intracavity adjusting screw periphery with the transmission screw periphery all has set firmly reverse gear, is located same two in the transmission intracavity reverse gear intermeshing.

The invention has the beneficial effects that: the invention can carry out power drive by the rotation of the clockwork spring and the power shaft, the clockwork spring is contracted and pressurized by manually rotating the trigger, when hands are released, the power shaft can slowly rotate by the abutting effect of the clamping block, the effect of power conversion is achieved under the effect of low cost, and the effect of back-and-forth rotation is realized by utilizing the turntable structure, wherein, the signal mechanism can control the left openings of the elastic arc-shaped plate and the aluminum sheet to rotate back and forth, and can contract the left opening channel, thereby effectively strengthening the signal intensity of the signal antenna and strengthening the wall penetrating effect of signals.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the structure a-a in fig. 1.

FIG. 3 is a schematic diagram of B-B in FIG. 1.

Fig. 4 is an enlarged schematic view of C in fig. 1.

Fig. 5 is a schematic diagram of the structure of D-D in fig. 4.

Detailed Description

The invention will now be described in detail with reference to fig. 1-5, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The WIFI communication equipment capable of increasing the signal through-wall effect comprises a base 15 and a control body 30, wherein the control body 30 is fixedly arranged on the top surface of the base 15, a signal output device 14 can be placed on the top surface of the base 15, signal mechanisms 101 capable of amplifying electronic signals of a signal antenna 11 are arranged in the control body 30 and on the left side of the control body, each signal mechanism 101 comprises two fixing blocks 36 which are vertically symmetrical and fixedly arranged on the left side surface of the control body 30, a rotating shaft 38 is rotatably arranged between the two fixing blocks 36, a U-shaped block 37 is fixedly arranged on the periphery of the rotating shaft 38, an elastic arc-shaped plate 12 is fixedly arranged between the mutually close side surfaces of the U-shaped blocks 37, an aluminum sheet 13 is fixedly arranged on the left side surface of the elastic arc-shaped plate 12, the signal antenna 11 is positioned in the aluminum sheet 13, a control cavity 40 with an opening facing the left and two transmission cavities 45 which are front-back symmetrical and have openings facing the left are arranged in the control, an adjusting shaft 27 is rotatably arranged on the bottom wall of the control cavity 40, a power turntable 28 is fixedly arranged on the top surface of the adjusting shaft 27, a connecting block 39 is fixedly arranged on the right side of the U-shaped block 37, a telescopic connecting rod 29 is hinged to the right side of the connecting block 39, a hinged cavity 49 is formed in the telescopic connecting rod 29, the telescopic connecting rod 29 is hinged to the top surface of the power turntable 28 in the hinged cavity 49, two fixing columns 42 which are symmetrical front and back are fixedly arranged on the left side surface of the control body 30, a pushing connecting rod 41 is hinged to the bottom surface of the fixing column 42, a pulley 48 is rotatably arranged at the left end of the pushing connecting rod 41, the pulley 48 is abutted to the right side surface of the elastic arc-shaped plate 12, a connecting cavity 50 is formed in the pushing connecting rod 41, a transmission screw 46 is rotatably arranged between the front wall and the rear wall of the transmission cavity 45, the moving block 47 is slidably connected with the inner wall of the transmission cavity 45, the moving block 47 is hinged with the pushing connecting rod 41 in the connecting cavity 50, a power mechanism 102 capable of providing power for the adjusting shaft 27 is arranged in the base 15, the power mechanism 102 comprises a power shaft 57, two limiting cavities 66 which are symmetrical up and down are arranged in the base 15, the two limiting cavities 66 are communicated, a spring cavity 56 and a ring cavity 60 are arranged in the base 15, the ring cavity 60 is communicated with the limiting cavities 66, the ring cavity 60 is communicated with the spring cavity 56, a gear cavity 16 is arranged at the left side of the spring cavity 56, the power shaft 57 penetrates through the limiting cavity 66, the ring cavity 60 and the spring cavity 56 and extends into the gear cavity 16, the right side surface of the power shaft is located outside, and a trigger 63 is fixedly arranged on the periphery of the power shaft 57 located outside, a limiting screw 67 is rotatably arranged between the left wall and the right wall of the limiting cavity 66, a slide block 61 is connected and arranged on the outer periphery of the limiting screw 67 in a threaded manner, the slide block 61 is connected with the inner wall of the limiting cavity 66 in a left-right sliding manner, the inner wall of the limiting cavity 66 is provided with a clamping block 65 in a vertical sliding manner, a pull rod 64 is hinged between the clamping block 65 and the sliding block 61, the clamping block 65 can be abutted against the power shaft 57, a screw die 68 is fixedly arranged on the periphery of the limiting screw 67, the extension part of the screw die 68 is positioned in the annular cavity 60, an annular wheel 59 is rotatably arranged between the left wall and the right wall of the annular cavity 60, an inclined tooth block 69 is fixedly arranged on the inner ring wall of the annular wheel 59, the helical tooth block 69 can be meshed with the screw die 68, a fixed disc 58 and a clockwork spring 55 are fixedly arranged on the periphery of the power shaft 57 positioned in the clockwork spring cavity 56, the fixed disc 58 is fixedly connected with the annular wheel 59, and the spring 55 is fixedly connected with the inner wall of the spring cavity 56.

Advantageously, a return spring 62 is fixedly installed between the right side surface of the sliding block 61 and the right wall of the limiting cavity 66, the left wall of the gear cavity 16 is rotatably provided with a gear shaft 17 and a transverse shaft 19, a ratchet wheel set 21 is dynamically connected between the transverse shaft 19 and the power shaft 57, a transmission gear 20 is fixedly installed on the outer periphery of the transverse shaft 19, a driven gear 24 is fixedly installed on the outer periphery of the gear shaft 17, the driven gear 24 is meshed with the transmission gear 20, the power shaft 57 can drive the fixed disc 58 and the clockwork spring 55 to rotate forward by manually rotating the trigger 63 in a forward direction, at the moment, the transverse shaft 19 is not moved, so that the clockwork spring 55 can be contracted and pressurized, meanwhile, the fixed disc 58 drives the annular wheel 59 to rotate forward, so that the annular wheel 59 can drive the dies 68 to rotate forward, and then the limiting screw 67 can drive the sliding block 61 to move leftward, the pull rod 64 is made to pull the clamp block 65 away from the power shaft 57, so that the power shaft 57 can rotate forward smoothly, when the power shaft 57 rotates and the spring 55 contracts to a certain amount, the trigger 63 is released, the spring 55 can drive the power shaft 57 to rotate backward, the power shaft 57 can drive the ring wheel 59 to rotate backward, the ring wheel 59 can not drive the dies 68 to rotate, the slide block 61 can be reset through the reset spring 62, the clamp block 65 can be made to abut against the power shaft 57, so that the power shaft 57 can rotate slowly, meanwhile, the power shaft 57 can rotate backward, the transmission gear 20 can drive the driven gear 24 to rotate in an accelerated manner, and the gear shaft 17 can be made to rotate in an accelerated manner.

Beneficially, an adjusting cavity 26 is opened at the lower side of the control cavity 40, an extending portion at the lower side of the adjusting shaft 27 extends into the adjusting cavity 26, an adjusting turntable 51 is fixedly arranged at the bottom surface of the adjusting cavity 26, a vertical shaft 25 is rotatably arranged between the adjusting cavity 26 and the gear cavity 16, a driven bevel gear set 18 is arranged between the vertical shaft 25 and the gear shaft 17 in a transmission connection manner, a transmission turntable 54 is fixedly arranged at the top surface of the vertical shaft 25, the diameter of the transmission turntable 54 is smaller than that of the adjusting turntable 51, a rack 52 is hinged to the top surface of the adjusting turntable 51, a roller 53 is rotatably arranged at the bottom wall of the adjusting cavity 26, the rack 52 is meshed with the adjusting turntable 51, and the rack 52 is slidably connected with the roller 53, by the rotation of the gear shaft 17, the vertical shaft 25 can drive the transmission turntable 54 to rotate, so that the rack 52 can drive the adjusting turntable 51 to rotate back and forth, then the adjusting shaft 27 can drive the power turntable 28 to rotate back and forth, and further the telescopic connecting rod 29 and the connecting block 39 can drive the U-shaped block 37 to rotate back and forth, so that the elastic arc-shaped plate 12 and the aluminum sheet 13 can rotate back and forth, and at this time, the released signal of the signal antenna 11 can be directionally diffused and spread, and the signal strength is increased.

Beneficially, a rectangular cavity 31 is opened on the upper side of the control cavity 40, adjusting screws 32 are rotatably provided on the front and rear walls of the rectangular cavity 31, two of the adjusting screws 32 are oppositely threaded and fixedly connected with each other, a short shaft 34 is rotatably provided on the top wall of the rectangular cavity 31, a transmission bevel gear set 33 is provided on the transmission connection between the adjusting screws 32 and the short shaft 34 on the rear side, an upper extension portion of the short shaft 34 is located outside and a knob 35 is fixedly provided on the top surface thereof, an extension portion of the adjusting screw 32 away from the rectangular cavity 31 side is located in the transmission cavity 45 and is rotatably connected with the inner wall of the transmission cavity 45, reverse gears 43 are fixedly provided on the outer peripheries of the adjusting screws 32 and the outer periphery of the transmission screw 46 located in the transmission cavity 45, two of the reverse gears 43 located in the same transmission cavity 45 are engaged with each other, when the signal puncture strength needs to be enhanced, by manually rotating the knob 35, the short shaft 34 can drive the adjusting screw 32 to rotate, so that the reverse gear 43 can drive the transmission screw 46 to rotate, the moving block 47 can move to the side away from the control cavity 40, at this time, the pushing link 41 can drive the pulley 48 to approach the elastic arc-shaped plate 12, and then the elastic arc-shaped plate 12 can contract to the signal antenna 11 side, so that the left channel of the aluminum sheet 13 can be reduced, and the signal puncture strength can be enhanced.

The following describes in detail, with reference to fig. 1 to 5, the use steps of a WIFI communication device capable of enhancing a signal through-wall effect in this document:

in the initial state, the elastic arc plate 12 and the aluminum sheet 13 are in a semicircular state, the spring 55 is in a relaxed state, and the clamp block 65 abuts against the outer periphery of the power shaft 57.

When in use, the trigger 63 is rotated forward by hand, the power shaft 57 can be made to drive the fixed disk 58 and the clockwork spring 55 to rotate forward, the transverse shaft 19 is not moved, the clockwork spring 55 can be contracted and pressurized, meanwhile, the fixed disk 58 can be made to drive the annular wheel 59 to rotate forward, the annular wheel 59 can be made to drive the dies 68 to rotate forward, the limiting screw 67 can be made to drive the sliding block 61 to move leftward, the pull rod 64 can be made to pull the clamping block 65 away from the power shaft 57, so that the power shaft 57 can be smoothly rotated forward, when the power shaft 57 rotates and the clockwork spring 55 contracts to a certain amount, the trigger 63 is released, the power shaft 57 can be driven to rotate backward by the clockwork spring 55, at this time, the power shaft 57 can be made to drive the annular wheel 59 to rotate backward, the annular wheel 59 does not drive the dies 68 to rotate, so that the sliding block 61 can be reset by the reset spring 62, the clamping block, the reverse rotation of the power shaft 57 can make the transverse shaft 19 reverse, so that the transmission gear 20 can drive the driven gear 24 to rotate at an accelerated speed, then the gear shaft 17 can make the gear shaft 17 rotate at an accelerated speed, the vertical shaft 25 can drive the transmission turntable 54 to rotate through the rotation of the gear shaft 17, so that the rack 52 can drive the adjusting turntable 51 to rotate back and forth, then the adjusting shaft 27 can drive the power turntable 28 to rotate back and forth, further the telescopic connecting rod 29 and the connecting block 39 can drive the U-shaped block 37 to rotate back and forth, so that the elastic arc-shaped plate 12 and the aluminum sheet 13 can rotate back and forth, at the moment, the signal released by the signal antenna 11 can be directionally diffused and spread, and the signal intensity is increased, when the signal puncture intensity needs to be enhanced, the short shaft 34 can drive the adjusting screw rod 32 to rotate through the manual rotation of the knob 35, so that the reverse gear 43 can drive the transmission screw rod, at this time, the pushing link 41 can drive the pulley 48 to approach the elastic arc-shaped plate 12, and then the elastic arc-shaped plate 12 can be contracted toward the signal antenna 11, so that the left channel of the aluminum sheet 13 can be reduced, and the signal puncture strength can be enhanced.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a can increase WIFI communications facilities of signal through-wall effect, includes the base and the control body, its characterized in that: the control body is fixedly arranged on the top surface of the base, a signal output device can be placed on the top surface of the base, signal mechanisms capable of amplifying signals of electronic signals of a signal antenna are arranged in the control body and on the left side of the control body, each signal mechanism comprises two fixed blocks which are vertically symmetrical and fixedly arranged on the left side surface of the control body, a rotating shaft is rotatably arranged between the two fixed blocks, a U-shaped block is fixedly arranged on the periphery of the rotating shaft, an elastic arc-shaped plate is fixedly arranged between the side surfaces, close to each other, of the U-shaped blocks, an aluminum sheet is fixedly arranged on the left side surface of the elastic arc-shaped plate, the signal antenna is positioned in the aluminum sheet, a control cavity with a leftward opening and two transmission cavities which are symmetrical front and back and have leftward openings are formed in the control body, an adjusting shaft is rotatably arranged on the bottom wall of the control cavity, a power turntable is fixedly arranged on, a telescopic connecting rod is hinged to the right side of the connecting block, a hinged cavity is formed in the telescopic connecting rod, the telescopic connecting rod is hinged to the top surface of the power rotating disc in the hinged cavity, two fixed columns which are symmetrical front and back are fixedly arranged on the left side surface of the control body, a pushing connecting rod is hinged to the bottom surfaces of the fixed columns, a pulley is rotatably arranged at the left end of the pushing connecting rod and abutted against the right side surface of the elastic arc plate, a connecting cavity is formed in the pushing connecting rod, a transmission screw rod is rotatably arranged between the front wall and the rear wall of the transmission cavity, a moving block is connected to the outer periphery of the transmission screw rod in a threaded manner, the moving block is connected with the inner wall of the transmission cavity in a sliding manner, and the; a power mechanism capable of providing power for the adjusting shaft is arranged in the base, the power mechanism comprises a power shaft, two limiting cavities which are symmetrical up and down are arranged in the base and communicated with each other, a spring cavity and an annular cavity are arranged in the base and communicated with each other, a gear cavity is arranged on the left side of the spring cavity, the power shaft penetrates through the limiting cavities, the annular cavity and the spring cavity and extends into the gear cavity, the right side surface of the power shaft is located outside, a trigger is fixedly arranged on the periphery of the power shaft located outside, a limiting screw rod is rotatably arranged between the left wall and the right wall of the limiting cavity, a sliding block is connected with the outer periphery of the limiting screw rod in a threaded manner and connected with the inner wall of the limiting cavity in a left-right sliding manner, and a clamping block is arranged on the inner wall of the limiting cavity in an up-down sliding manner, the clamp splice with it is equipped with the pull rod to articulate between the slider, clamp splice ability butt the power shaft, the periphery of restriction screw rod has set firmly the threading die, threading die extension is located the annular chamber, it is equipped with the annular wheel to rotate between the wall about the annular chamber, set firmly oblique tooth piece on the inner circle wall of annular wheel, oblique tooth piece can with the threading die meshing is located the clockwork spring intracavity the power shaft periphery has set firmly fixed disk and clockwork spring, the fixed disk with annular wheel fixed connection, the clockwork spring with the inner wall fixed connection in clockwork spring chamber.

2. The WIFI communication device of claim 1, wherein said WIFI communication device is capable of increasing signal through-wall effect, wherein: the right flank of slider with fixed mounting has reset spring between the right wall in restriction chamber, the left wall in gear chamber rotates and is equipped with gear shaft and cross axle, the cross axle with power connection is equipped with the ratchet group between the power shaft, the periphery of cross axle has set firmly drive gear, the periphery of gear shaft has set firmly driven gear, driven gear with drive gear meshes.

3. The WIFI communication device of claim 2, wherein said WIFI communication device is capable of increasing signal through-wall effect, wherein: the downside in control chamber has been seted up and has been adjusted the chamber, regulating spindle downside extension stretches into adjust the intracavity, and its bottom surface has set firmly the regulation carousel, adjust the chamber with it is equipped with the vertical axis to rotate between the gear chamber, the vertical axis with the transmission is connected between the gear shaft and is equipped with driven bevel gear group, the top surface of vertical axis has set firmly the transmission carousel, the diameter of transmission carousel is less than adjust the carousel, the articulated rack that is equipped with of top surface of adjusting the carousel, the diapire in regulation chamber rotates and is equipped with the gyro wheel, the rack with adjust the carousel meshing, just the rack with gyro wheel sliding connection.

4. A WIFI communication device capable of increasing the signal through-wall effect as claimed in claim 3, wherein: the rectangle chamber has been seted up to the upside in control chamber, all rotate on the wall around the rectangle chamber and be equipped with adjusting screw, two adjusting screw thread is opposite, and mutual fixed connection, the roof in rectangle chamber rotates and is equipped with the minor axis, is located the rear side adjusting screw with the transmission is connected between the minor axis and is equipped with transmission bevel gear group, minor axis upside extension is located the external world, and its top surface has set firmly the knob, adjusting screw keeps away from rectangle chamber side extension is located the transmission intracavity, and with transmission intracavity wall rotates to be connected, is located the transmission intracavity adjusting screw periphery with the transmission screw periphery all has set firmly reverse gear, is located same two in the transmission intracavity reverse gear intermeshing.