CN117222583A - Cleaning material quantitative distribution device for non-quantitative valve - Google Patents

Abstract

The application discloses a detergent quantitative distribution device for a non-quantitative valve, which comprises: the elastic injection valve is provided with a pressing end; the pressing component comprises a pressing wheel, a pressing block and a unidirectional transmission structure, wherein the pressing block is arranged on the machine shell in a reciprocating sliding manner through an elastic piece in a resetting manner, the unidirectional transmission structure is used for enabling the pressing block to drive unidirectional rotation of the pressing wheel during pressing motion and stop of the pressing wheel during resetting motion, a plurality of pressing parts are arranged at annular intervals on the periphery of the pressing wheel, and the plurality of pressing parts are arranged to sequentially abut against the pressing end to enable the elastic injection valve to inject. The elastic injection valve can realize one-time quantitative distribution in each reciprocating sliding working cycle of the pressing block, so that continuous pressing and continuous injection are avoided, waste of cleaning objects is reduced, and user experience is improved.

Description

Cleaning material quantitative distribution device for non-quantitative valve

Technical Field

The application relates to the field of cleaning object dispensers, in particular to a cleaning object quantitative dispensing device for a non-quantitative valve.

Background

The push type injection valve adopted by the aerosol can in the market at present is an unquantitative valve, when the injection valve is in a pre-pressed state, the content of the aerosol can is in a constant injection state, the manual distribution device of the aerosol can cannot realize a quantitative distribution function, and the content injection quantity can only be controlled by the time of pushing the injection valve, so that a large amount of content of the aerosol can is wasted, and although some distribution devices capable of realizing quantitative distribution appear in the market, the structure is complex, the distribution device cannot be matched with the existing push type unquantitative injection valve for use, and the spray quantity cannot be regulated.

Disclosure of Invention

The present application aims to provide a detergent dosing device for a non-dosing valve, which solves one or more technical problems of the prior art, and at least provides a beneficial choice or creation condition.

The technical scheme adopted for solving the technical problems is as follows:

the present application provides a detergent dosing device for a non-dosing valve, comprising: the elastic injection valve is provided with a pressing end; the pressing assembly comprises a pressing wheel, a pressing block which is arranged on the machine shell in a resetting manner through an elastic piece in a reciprocating sliding manner, and a unidirectional transmission structure which is connected between the pressing wheel and the pressing block in a transmission manner, wherein the reciprocating sliding of the pressing block comprises pressing movement and resetting movement which are opposite to each other, the unidirectional transmission structure is used for enabling the pressing block to be in unidirectional rotation of the pressing wheel which is driven during the pressing movement and to be in the pressing wheel stopping during the resetting movement, a plurality of pressing portions are arranged at annular intervals on the periphery of the pressing wheel, and the pressing portions are arranged to sequentially abut against the pressing ends to enable the elastic injection valve to inject.

The beneficial effects of the application are as follows: when the device is used, the elastic injection valve is arranged at the tank opening of the aerosol tank, when the cleaning objects of the aerosol tank are sprayed out in a quantitative distribution manner, the pressing block is pressed, in the pressing motion process of the pressing block from a free state, the pressing block is driven to rotate in one direction through the unidirectional transmission structure, the rotating pressing wheel sequentially abuts against the pressing end on the elastic injection valve through the plurality of pressing parts on the periphery, in the process, the elastic injection valve realizes one or more spraying opening motions, namely quantitative distribution, and after the pressing block is pressed, the elastic injection valve does return to perform reset motions under the action of reset elasticity of the elastic piece, in the process, the pressing end at the moment does not perform pressing operation, and the elastic injection valve does not perform spraying motions, namely, the pressing block does not reciprocate in each working period, the elastic injection valve can realize one-time quantitative distribution, continuous pressing is avoided, continuous spraying is realized, the waste of the cleaning objects is reduced, and the user experience is increased.

As a further improvement of the technical scheme, the unidirectional transmission structure comprises a driven shaft rotatably installed in the shell, a unidirectional bearing sleeved on the driven shaft and a driven wheel, wherein the pressing wheel is sleeved on the unidirectional bearing, and the driven wheel is in transmission connection with the pressing block.

The briquetting in this scheme is when being pushed by pressing, rotate the pressing wheel that drives on the driven shaft through driving from the driving wheel, wherein the pressing wheel passes through one-way bearing and installs on the driven shaft, the driven shaft is to the unidirectional rotation of one-way bearing drive pressing wheel when one direction rotates, and the driven shaft is to the other direction when rotating, the pressing wheel is at the conflict lower stop of pressing the end, that is to say the relative pressing wheel rotation of driven wheel this moment, the reset motion of messenger's briquetting reciprocating motion one cycle in-process, only can drive the pressing wheel rotation when the pressing motion of anterior segment, people are when the operation, press the motion to the briquetting and control the degree higher, be equivalent to after pressing the briquetting, just can realize quantitative distribution, with the duration irrelevant of pressing, even press the briquetting always, the elasticity injection valve also can not open the injection.

As a further improvement of the technical scheme, the driven wheel is a gear, and the pressing block is provided with a rack meshed with the driven wheel.

The briquetting in this scheme realizes the transmission through the tooth meshing of rack and driven wheel periphery, and wherein the phenomenon that skidding can not appear in the meshing transmission of rack and gear can be guaranteed.

As a further improvement of the technical scheme, the elastic piece is a spring, and at least one of the pressing block and the casing is provided with a convex column sleeved with the spring.

The elastic component in this scheme adopts the spring, and the both ends of spring are used in briquetting and casing respectively to in order to avoid the spring to break away from at the in-process slope of pressing, set up the projection and fix a position the spring.

As a further improvement of the technical scheme, the pressing block comprises a pressing head extending out of the machine shell and two sliding arms connected to the inner end of the pressing head at intervals side by side, the spring is vertically arranged between the two sliding arms, and the sliding arms slide into the machine shell.

The briquetting in this scheme is formed by pressure head and two sliding arms connection, and the pressure head stretches out the casing outward, and two sliding arms slip stretch into in the casing to two sliding arms still can carry out spacing installation to the spring that is located its centre.

As a further improvement of the technical scheme, a sliding groove is arranged on the side face of the sliding arm, and a guide block which is in sliding limit fit with the sliding groove is fixed in the casing.

Wherein in order to avoid the briquetting to slide out from the casing, this scheme has set up the spout slip spacing cooperation on guide block and the arm side in the casing.

As a further improvement of the technical scheme, the pressing part is of an arc-shaped protruding structure, and an arc-shaped abutting surface is arranged on the outer side face of the pressing part. The pressing part in this scheme adopts the protruding structure of arc, presses the part and contradicts with pressing the end through the arc conflict face, can guarantee like this that the pressing part can promote under the circumstances of pressing the end when rotating for pressing on the end can jump down smoothly pressing the part, the operation of being convenient for avoids appearing the phenomenon of jam.

As a further improvement of the technical scheme, the elastic injection valve is provided with an elastic reset valve core and a pressing swing arm rotatably arranged on the outer side of the elastic injection valve, one end of the pressing swing arm is connected with the elastic reset valve core, and the other end of the pressing swing arm is the pressing end.

According to the scheme, the elastic reset valve core is driven to move through the swinging of the pressing swing arm so as to realize the spraying action of the elastic spraying valve, wherein the two ends of the pressing swing arm are respectively acted on the end part of the elastic reset valve core and the pressing part of the pressing wheel, and the swinging center of the pressing swing arm is arranged between the two ends of the pressing swing arm, so that the pressing is lighter, the labor-saving effect is realized, the position of the pressing swing arm in a free state is determined according to the size of the pressing wheel, the pressing end is ensured to be positioned between two adjacent pressing parts under the free state, and the elastic spraying valve is in a closed state after each pressing is ensured.

As a further improvement of the technical scheme, the pressing assembly further comprises a spray amount adjusting structure for adjusting the reciprocating sliding stroke of the pressing block.

The adjustment of spraying amount is realized to the spraying amount adjustment structure has still been set up to this scheme, and the concrete mode just is correlated with the rotatory angle of push wheel through the reciprocal gliding stroke of regulation briquetting, because the reciprocal gliding stroke of briquetting, when needs big spraying amount, the reciprocal gliding stroke of extension briquetting, and when needs little spraying amount, shortens the reciprocal gliding stroke of briquetting.

As a further improvement of the technical scheme, the spray amount adjusting structure comprises an adjusting block which is slidably arranged in the shell, wherein the adjusting block is provided with a first gear arranged at the tail end part of the reciprocating sliding track of the pressing block and a second gear arranged outside the reciprocating sliding track of the pressing block.

According to the scheme, the reciprocating sliding stroke of the pressing block is adjusted through the adjusting block, when the reciprocating sliding stroke of the pressing block needs to be shortened, the adjusting block is pushed to the tail end of the reciprocating sliding track, when the pressing block is pressed and moved to the tail end, the end of the pressing block can be resisted by the adjusting block, the stroke of the pressing block pressed is shortened, and when the reciprocating sliding stroke of the pressing block needs to be prolonged, the adjusting block is pushed to the outer side of the reciprocating sliding track.

In other schemes, the adjusting block can be arranged into a multi-stage ladder structure, and the adjusting block is pushed to a set position according to different requirements, so that the corresponding ladder steps can resist the pressing block, and the adjustment of multiple gears is realized.

Drawings

The application is further described below with reference to the drawings and examples;

FIG. 1 is an exploded view of one embodiment of a cleaning substance dosing device provided by the present application;

FIG. 2 is a schematic view of a detergent dosage-dispensing device according to an embodiment of the present application when installed in an aerosol canister;

FIG. 3 is a schematic view of one side of the interior of a housing of a detergent dispensing device according to an embodiment of the present application;

FIG. 4 is a schematic view of another side of the interior of a housing of an embodiment of a detergent dispensing device according to the present application;

FIG. 5 is a schematic diagram of the cleaning material quantitative distribution device provided by the application after a pressing block is pressed when an adjusting block is pushed to the outer side of a reciprocating sliding track of the pressing block to realize large spraying amount;

FIG. 6 is a schematic diagram of the cleaning material quantitative distribution device provided by the application after a pressing block is pressed when an adjusting block is pushed to the inner end part of a reciprocating sliding track of the pressing block to realize small spraying amount;

fig. 7 is a schematic view of the cleaning material quantitative distribution device provided by the application, wherein the pressing block is in a free state when the adjusting block is pushed to the inner end part of the reciprocating sliding track of the pressing block.

Detailed Description

Reference will now be made in detail to the present embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present application, but not to limit the scope of the present application.

In the description of the present application, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

In the description of the present application, if there is a word description such as "a plurality" or the like, the meaning of a plurality is one or more, and the meaning of a plurality is two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number.

In the description of the present application, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present application can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1 to 7, the detergent dosage-dispensing device for a non-quantitative valve according to the present application is constructed as follows:

the cleaning material quantitative distribution device of the present embodiment includes: the injection valve comprises a housing 100, an elastic injection valve 200 and a pressing assembly, wherein the elastic injection valve 200 and the pressing assembly are installed in the housing 100.

The casing 100 includes a base, a front shell sleeved on the front side of the base, and a front shell sleeved on the rear side of the base, where the front shell and the front shell are connected to the base by screws, so that the front and rear sides of the casing 100 form mounting chambers.

The elastic injection valve 200 is installed at the rear side of the interior of the machine base, the elastic injection valve 200 has an inlet end and an outlet end, through holes for the inlet end and the outlet end to pass through are correspondingly formed in the wall body of the machine shell 100, and in use, as shown in fig. 2, the inlet end of the elastic injection valve 200 is connected with the tank opening of the aerosol tank.

As shown in fig. 4, while the elastic injection valve 200 is provided with a pressing end 210, injection of the elastic injection valve 200, specifically, can be achieved by pressing the pressing end 210. The elastic injection valve 200 of this embodiment includes a valve body, an elastic reset valve core installed in the valve body, and a pressing swing arm 220, wherein the specific structure of the valve body interior and the elastic reset valve core is the prior art, namely the injection of the elastic injection valve 200 can be realized by operating the elastic reset valve core, which is equivalent to the existing pressing pump structure, wherein a hinge part hinged with the outer side of the valve body is arranged between two ends of the pressing swing arm 220, one end of the pressing swing arm 220 is connected with the outer end of the elastic reset valve core, the other end of the pressing swing arm 220 is arranged as the pressing end 210, the elastic reset valve core is driven to move by the swing of the pressing swing arm 220, so as to realize the injection action of the elastic injection valve 200, and the swing center of the pressing swing arm 220 is arranged between two ends of the pressing swing arm 220, so that the pressing is lighter, and the labor-saving effect is realized.

The pressing assembly comprises a pressing wheel 300, a pressing block 400 and a one-way transmission structure, wherein the pressing wheel 300 and the elastic injection valve 200 are arranged on the same side, the pressing block 400 is slidably installed in the machine shell 100, an elastic piece is arranged between the pressing block 400 and the machine shell 100, so that the pressing block 400 can reciprocally slide in the machine shell 100, the reciprocal sliding of the pressing block 400 comprises pressing motions and resetting motions which are mutually reversely arranged, the pressing motions are that the pressing block 400 is subjected to external acting force and is pressed inwards, the elastic piece is elastically deformed to store energy, the resetting motions are that the pressing block 400 is loosened after being pressed, and the pressing motions automatically return to move under the action of the resetting elastic force of the elastic piece.

The pressing wheel 300 is driven to rotate unidirectionally by the pressing block 400 when the pressing block 400 performs pressing motion, and the pressing wheel 300 is stopped by the pressing block 400 when the pressing block 400 performs resetting motion, that is, the pressing block 400 can be driven to rotate only when the pressing motion is performed in a period when the pressing block 400 is pressed.

In this embodiment, a plurality of pressing portions 310 are provided on the outer circumferential side of the pressing wheel 300, the plurality of pressing portions 310 are provided at annular intervals, and the plurality of pressing portions 310 are provided so as to sequentially press the pressing end 210 against each other to spray the elastic spray valve 200.

The press block 400 of this embodiment includes an integrally formed press head 430 and two sliding arms 440, the two sliding arms 440 are connected to the inner end of the press head 430 side by side at intervals, the press head 430 extends out of the casing 100, the two sliding arms 440 slide and extend into the casing 100, the elastic member of this embodiment adopts a spring 800, two ends of the spring 800 respectively act on the press block 400 and the casing 100, and the spring 800 is vertically arranged between the two sliding arms 440, one end of the spring 800 acts on the inner end of the press head 430, and the spring 800 acts on an abutment table inside the casing 100, in this embodiment, a convex column 420 is arranged at the inner end of the press head 430, the convex column 420 is sleeved with the spring 800, so as to position the spring 800, and avoid the spring 800 from being separated obliquely in the pressing process, and the two sliding arms 440 can also limit the spring 800 located in the middle.

In other embodiments, the post 420 may be disposed on an abutment inside the housing 100, or both may be provided with the post 420.

In order to prevent the press block 400 from sliding out of the casing 100, a sliding groove 441 is provided on the side surface of the sliding arm 440, a guide block 110 is fixed in the casing 100, and the guide block 110 can be in sliding and limit fit with the sliding groove 441.

When the cleaning material of the aerosol can is sprayed quantitatively, the pressing block 400 is pressed, and when the pressing block 400 is pressed from a free state, the pressing block 300 is driven to rotate unidirectionally together through the unidirectional transmission structure, the rotating pressing block 300 sequentially presses the elastic pressing ends 210 on the elastic spraying valve 200 in a abutting manner through the plurality of pressing parts 310 on the periphery, in the process, the elastic spraying valve 200 realizes one or more spraying opening actions, namely the quantitative distribution, and when the pressing block 400 is pressed, the elastic pressing ends 210 are not pressed in the stop state, and the elastic spraying valve 200 does not perform the spraying action, namely the pressing block 400 slides reciprocally every working period, the elastic spraying valve 200 can realize one-time quantitative distribution, avoid continuous pressing and continuous spraying, reduce the waste of the cleaning material and increase the user experience.

The unidirectional transmission structure of the embodiment comprises a driven shaft 500, a unidirectional bearing 600 and a driven wheel 700, wherein the driven shaft 500 is rotatably installed in the machine shell 100, the unidirectional bearing 600 and the driven wheel 700 are respectively sleeved at two ends of the driven shaft 500, the pressing wheel 300 is sleeved on the unidirectional bearing 600, and the driven wheel 700 is in transmission connection with the pressing block 400.

When the pressing block 400 is pushed, the pressing wheel 300 on the driven shaft 500 is driven to rotate by driving the driven wheel 700 to rotate, wherein the pressing wheel 300 is mounted on the driven shaft 500 through the one-way bearing 600, the pressing wheel 300 can be driven to rotate in one direction through the one-way bearing 600 when the driven shaft 500 rotates in one direction, and the pressing wheel 300 stops under the collision of the elastic pressing end 210 when the driven shaft 500 rotates in the other direction, that is, the driven wheel 700 rotates relative to the pressing wheel 300 at the moment, the reset motion of the pressing block 400 is not influenced, the pressing wheel 300 can be driven to rotate only in the process of one period of the reciprocating motion of the pressing block 400, the pressing motion of the pressing block 400 is controlled to be higher when people operate, quantitative distribution can be realized after the pressing block 400 is pressed, the time is not related to the pressing time, and the elastic injection valve 200 can not open the injection even if the pressing block 400 is not pressed.

Specifically: in terms of the manner in which the driven wheel 700 is in driving connection with the press block 400, the driven wheel 700 of the present embodiment is provided as a gear, and the press block 400 is provided with a rack 410, and the rack 410 is in meshing connection with the driven wheel 700.

In other embodiments, driven wheel 700 and press block 400 may be configured by a friction wheel and friction surface transmission, and the linear motion of press block 400 may be converted into the rotation of driven wheel 700.

The press block 400 of the embodiment realizes transmission by meshing the rack 410 with teeth on the periphery of the driven wheel 700, wherein the meshing transmission of the rack 410 and the gear can ensure that no slipping phenomenon occurs.

The pressing part 310 of this embodiment adopts the protruding structure of arc pressing part 310 lateral surface is provided with the arc and contradicts the face, presses part 310 and presses the end 210 through the arc and contradicts, can guarantee like this that pressing part 310 can promote the elasticity when rotating and press under the condition of end 210 for the elasticity presses end 210 can jump smoothly on the next pressing part 310, and the operation of being convenient for avoids appearing the phenomenon of jam.

And for the position in the free state of the pressing swing arm 220, the pressing end 210 is ensured to be positioned between two adjacent pressing parts 310 in the free state according to the size of the pressing wheel 300, so that the elastic injection valve 200 is ensured to be in a closed state after each pressing.

Further, the pressing assembly further includes a spray amount adjusting structure for adjusting the reciprocating stroke of the pressing block 400, because the reciprocating stroke of the pressing block 400 is associated with the rotation angle of the pressing wheel 300, when a large spray amount is required, the reciprocating stroke of the pressing block 400 is prolonged, and when a small spray amount is required, the reciprocating stroke of the pressing block 400 is shortened.

Specifically: the spray amount adjusting structure comprises an adjusting block 900, wherein the adjusting block 900 is slidably mounted in the casing 100, an operation groove is formed in the wall of the casing 100 for convenience of operation, and a toggle member arranged in the operation groove is arranged on the adjusting block 900.

The two ends of the sliding track of the adjusting block 900 are respectively provided with a first gear and a second gear, the adjusting block 900 in the first gear is pushed to the end of the reciprocating sliding track of the pressing block 400, and the adjusting block 900 in the second gear is pushed to the outer side of the reciprocating sliding track of the pressing block 400.

As shown in fig. 5, 6 and 7, the present embodiment adjusts the reciprocating sliding stroke of the press block 400 by the adjusting block 900, when the reciprocating sliding stroke of the press block 400 needs to be shortened, pushes the adjusting block 900 to the end portion of the reciprocating sliding track, when the press block 400 is pressed and moved to the end, the end portion of the press block 400 is resisted by the adjusting block 900, shortens the stroke of the press block 400, and when the reciprocating sliding stroke of the press block 400 needs to be lengthened, pushes the adjusting block 900 to the outside of the reciprocating sliding track.

In other embodiments, the adjusting block 900 may be configured as a multi-stage ladder structure, and according to different requirements, the adjusting block 900 is pushed to a set position, so that the corresponding ladder steps can resist the pressing block 400, and multi-gear adjustment is achieved.

While the preferred embodiment of the present application has been described in detail, the application is not limited to the embodiments, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the application, and these modifications and substitutions are intended to be included in the scope of the present application as defined in the appended claims.

Claims (10)

1. A cleaning article metering device for a non-metering valve, characterized by: it comprises the following steps:

a housing (100);

an elastic injection valve (200) having a pressing end (210);

the pressing assembly comprises a pressing wheel (300), a pressing block (400) which is arranged on the machine shell (100) in a reciprocating sliding mode through an elastic piece in a resetting mode, and a unidirectional transmission structure which is connected between the pressing wheel (300) and the pressing block (400) in a transmission mode, wherein the reciprocating sliding of the pressing block (400) comprises pressing motion and resetting motion which are opposite to each other, the unidirectional transmission structure is used for enabling the pressing block (400) to be in unidirectional rotation which drives the pressing wheel (300) in the pressing motion and stop the pressing wheel (300) in the resetting motion, a plurality of pressing portions (310) are arranged on the periphery of the pressing wheel (300) at annular intervals, and the pressing portions (310) are arranged to sequentially abut against the pressing end (210) to enable the elastic injection valve (200) to inject.

2. A cleaning article metering device for a non-metering valve as set forth in claim 1 wherein:

the unidirectional transmission structure comprises a driven shaft (500) rotatably installed in the shell (100), a unidirectional bearing (600) sleeved on the driven shaft (500) and a driven wheel (700), wherein the pressing wheel (300) is sleeved on the unidirectional bearing (600), and the driven wheel (700) is in transmission connection with the pressing block (400).

3. A cleaning article metering device for a non-metering valve as set forth in claim 2 wherein:

the driven wheel (700) is a gear, and the pressing block (400) is provided with a rack (410) meshed with the driven wheel (700).

4. A cleaning article metering device for a non-metering valve as set forth in claim 1 wherein:

the elastic piece is a spring (800), and at least one of the pressing block (400) and the machine shell (100) is provided with a convex column (420) sleeved with the spring (800).

5. A cleaning article metering device for a non-metering valve as set forth in claim 4 wherein:

the pressing block (400) comprises a pressing head (430) extending out of the machine shell (100), and two sliding arms (440) connected to the inner ends of the pressing head (430) side by side at intervals, wherein the spring (800) is vertically arranged between the two sliding arms (440), and the sliding arms (440) slide into the machine shell (100).

6. A cleaning article metering device for a non-metering valve as set forth in claim 5 wherein:

the sliding arm (440) is provided with a sliding groove (441) on the side surface, and a guide block (110) which is in sliding limit fit with the sliding groove (441) is fixed in the machine shell (100).

7. A cleaning article metering device for a non-metering valve as set forth in claim 1 wherein:

the pressing part (310) is of an arc-shaped protruding structure, and an arc-shaped abutting surface is arranged on the outer side face of the pressing part (310).

8. A cleaning article metering device for a non-metering valve as set forth in claim 7 wherein:

the elastic injection valve (200) is provided with an elastic reset valve core and a pressing swing arm (220) rotatably arranged on the outer side of the elastic injection valve (200), one end of the pressing swing arm (220) is connected with the elastic reset valve core, and the other end of the pressing swing arm (220) is the pressing end (210).

9. A cleaning article dosing apparatus for a non-dosing valve according to any one of claims 1 to 8 wherein:

the pressing assembly further comprises a spray amount adjusting structure for adjusting the reciprocating sliding stroke of the pressing block (400).

10. A cleaning article metering device for a non-metering valve as set forth in claim 9 wherein:

the spray amount adjusting structure comprises an adjusting block (900) which is slidably arranged in the machine shell (100), wherein the adjusting block (900) is provided with a first gear arranged at the tail end part of a reciprocating sliding track of the pressing block (400) and a second gear arranged at the outer side of the reciprocating sliding track of the pressing block (400).