WO2016202211A1

WO2016202211A1 - Labor-saving spray gun

Info

Publication number: WO2016202211A1
Application number: PCT/CN2016/085284
Authority: WO
Inventors: 林逢德; 张明富; 陈文兴
Original assignee: 厦门松霖科技有限公司; 周华松
Priority date: 2015-06-15
Filing date: 2016-06-08
Publication date: 2016-12-22

Abstract

A labor-saving spray gun comprises a body (1), a starting means (2), and a switching means (3). The starting means (2) and the switching means (3) are interconnected, to cause the starting means (2) to control the switching means (3) to be switched between a first position and a second position. When the switching means (3) is at the first position, an outflow channel (11) and an inflow channel (12) in the body (1) are separated, and when the switching means (3) is at the second position, the outflow channel (11) and the inflow channel (12) in the body (1) are in communication. A cavity (13) separately in communication with the outflow channel and the inflow channel is provided in the body (1), and the switching means (3) is installed within the cavity (13). An allowance space (131) is provided in the cavity (13), so that the switching means (3) is switched between the first position and the second position. The switching means (3) is provided with a through hole. When the switching means (3) is at the second position, the through hole (31) drains a part of water in the cavity into the allowance space (131).

Description

Labor saving spray gun

Technical field

The invention relates to a labor saving spray gun.

Background technique

The spray gun has a wide range of applications in many fields, such as kitchen cleaning. The spray gun has a switching member. When the switching member is in the first position, the water outlet of the spray gun is blocked, and the spray gun cannot discharge water; when the switch is in the second position. The water outlet of the spray gun is opened and the spray gun is normally discharged. When the outlet passage is blocked, the flow of water creates a pressure on the switching member, and as the flow rate of the water increases, the pressure increases. Therefore, the user needs to overcome this pressure to switch the position of the switching member from the first position to the second position, which is very laborious. In extreme cases, excessive water pressure can even cause the switching member to rupture. Further, when the switching member is switched to the second position, in order to maintain the water discharge state, it is necessary to bring the switching member to the second position for a long time. However, as the water flow in the water outlet channel increases, the pressure of the water flow on the switching member also increases, and the force required to maintain the switching member in the second position is also increased, and the user is very inconvenient to operate.

Summary of the invention

The main technical problem to be solved by the present invention is to provide a labor-saving spray gun, wherein the force of the spray gun to keep the water out state is small, and the user feels better.

In order to solve the above technical problem, the present invention provides a labor-saving spray gun, comprising: a body, a starting member and a switching member; the starting member and the switching member are connected in series, and the operating member is operated to control the switching member at the first Switching between the position and the second position; when the switching member is in the first position, the water outlet passage and the water inlet passage in the body are partitioned; when the switching member is in the second position, the water outlet passage in the body and The inlet channel is connected;

The body is provided with a cavity respectively connecting the water outlet passage and the water inlet passage, and the switching member is installed in the cavity; the cavity has a letting space, so that the switching member is in the first position and Switching between the second positions;

The switching member has a through hole, and the through hole drains a water portion in the cavity into the yield space when the switching member is in the second position.

In a preferred embodiment, the switching member is provided with a first sealing ring and a second sealing ring; when the switching member is in the first position, the first sealing ring and the second sealing ring are respectively received The thrust and pressure of the water flow in the inlet channel.

In a preferred embodiment, when the switching member is in the first position, the first sealing ring position is lower than the water outlet end of the water inlet channel; the second sealing ring position is higher than the water inlet channel The end of the water.

In a preferred embodiment, when the switching member is in the first position, the first sealing ring seals the communication between the cavity and the water inlet channel and the water outlet channel; the second sealing ring will make the space and the space The inlet and outlet channels are isolated.

In a preferred embodiment, the switching member is a valve core, one end of which is a connecting rod that is connected with the starting member, and the other end is a mounting seat that cooperates with the cavity, the first The sealing ring and the second sealing ring are disposed in parallel with the outer circumference of the mounting seat; the mounting seat has an upper opening receiving cavity; the through hole is disposed at an outer circumference of the mounting seat and communicates with the receiving cavity .

In a preferred embodiment, an elastic member is disposed in the accommodating cavity, and the mounting seat is elastically mounted in the cavity.

In a preferred embodiment: the resilient member is a spring.

In a preferred embodiment, the starting member is a button, and the bottom portion thereof is coupled to the connecting rod.

In a preferred embodiment, the body includes a water outlet portion and a grip portion, and the portion of the grip portion corresponding to the thumb is provided with a button mounting groove that communicates with the cavity.

In a preferred embodiment, the first sealing ring and the second sealing ring have the same force receiving area when the switching member is in the first position.

Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

1. A labor-saving spray gun provided by the present invention, when the actuating member is closed, the switching member is simultaneously subjected to the pressure and thrust of the water flow, and the pressure and the thrust are respectively applied to the first sealing ring and the second sealing ring, and the working area is also the same. Therefore, the pressure and thrust are approximately equal to each other. The user only needs to overcome the elastic force of the elastic member to start the starting member, and the required force is small, and the pressing feel is also better.

2. The invention provides a labor-saving spray gun, wherein after the actuating member is opened, since the switching member has a through hole, when the switching member is in the second position, the through hole drains the water portion in the cavity to the Let the space inside. According to the force analysis, the switching member is only subjected to water pressure at the connecting rod portion, and the other portions are simultaneously subjected to water pressure and water thrust, and cancel each other. That is, the switching member is only subjected to the sum of the water pressure of the connecting rod portion and the restoring force of the elastic member. Since the water pressure received by the connecting rod portion is the same as the returning force of the spring, the elastic return of the spring required for the switching member to return to the first position is required. The force can be relatively small, because the spring force is reduced, the switching force required to switch the switching member from the first position to the second position on the actuating member is reduced; and since the cross-sectional area of the connecting rod is small, The water pressure applied to this portion is also small, so that the operating force required to maintain the switching member in the second position is also small, further increasing the hand feeling.

DRAWINGS

1 is a schematic cross-sectional view of a labor-saving spray gun in a preferred embodiment of the present invention;

2 is a cross-sectional view showing a labor-saving spray gun when the switching member is in the first position in a preferred embodiment of the present invention;

3 is a cross-sectional view showing a labor-saving spray gun when the switching member is in the second position in a preferred embodiment of the present invention;

4 is a diagram showing the relationship between the switching force of the labor-saving spray gun and the flow rate and the measured data of the water pressure in the preferred embodiment of the present invention.

detailed description

The invention is further described below in conjunction with the drawings and specific embodiments.

Referring to FIG. 1-3, a labor-saving spray gun includes: a body 1, a starting member 2 and a switching member 3; the starting member 2 and the switching member 3 are connected in linkage, and the operating member 2 is operated to control the switching member 3 to be Switching between the first position and the second position; when the switching member 3 is in the first position, the water outlet channel 11 and the water inlet channel 12 in the body 1 are blocked; when the switching member 3 is in the second position, The water outlet passage 11 and the water inlet passage 12 in the body 1 are connected to each other;

The body 1 is provided with a cavity 13 respectively communicating with the water passage 11 and the water inlet passage 12, and the switching member 3 is installed in the cavity 13; the cavity 13 has a seating space 131, so that The switching member 3 switches between the first position and the second position;

The switching member 3 has a through hole 31. During the movement of the switching member from the first position to the second position, the air in the yield space 131 is discharged by the through hole 31, and the switching member receives the resistance. It is relatively small, making the switching force light. When the switching member 3 is in the second position, the through hole 31 drains the water portion in the cavity 13 into the yield space 131, as shown in FIG. After this arrangement, the switching member is subjected to the thrust of the water in the cavity 13, and the pressure of the water in the space 131. After the thrust and the pressure are partially offset, the switching member is only subjected to the pressure, and the direction of the spring and the elastic force of the spring are restored. The same, so the elastic returning force of the spring required for the switching member 3 to return to the first position can be relatively small, and the spring elastic force is reduced, and the spring member is required to be switched on the actuating member 2 to switch the switching member 3 from the first position to the second position. The switching force is reduced.

The switching member 3 is provided with a first sealing ring 32 and a second sealing ring 33; when the switching member 3 is in the first position, the first sealing ring 32 is lower than the water outlet end 121 of the water inlet channel 12; The second sealing ring 33 is higher than the water outlet end 121 of the water inlet passage 12. The first sealing ring 32 seals the communication between the cavity 13 and the water inlet passage 12 and the water outlet passage 11; the second sealing ring 33 isolates the space 131 from the water inlet passage 12 and the water outlet passage 11. Therefore, the first seal ring 32 and the second seal ring 33 are respectively subjected to the thrust and pressure of the water flow in the water inlet passage 12. And the force receiving areas of the first sealing ring 32 and the second sealing ring 33 are the same. Thus the thrust and pressure can be considered approximately equal, so that when the switching member 3 is in the first position, the switching member 3 is substantially unaffected by the pressure or thrust from the water flow.

The force-saving spray gun is subjected to force analysis. When the switching member 3 is in the first position, the first sealing ring 32 is positioned lower than the water outlet end 121 of the water inlet passage 12; the second sealing ring 33 The position is higher than the water outlet end 121 of the water inlet passage 12. The first sealing ring 32 seals the communication between the cavity 13 and the water inlet passage 12 and the water outlet passage 11; the second sealing ring 33 isolates the space 131 from the water inlet passage 12 and the water outlet passage 11. Therefore, the first seal ring 32 and the second seal ring 33 are respectively subjected to the thrust and pressure of the water flow in the water inlet passage 12. And the force receiving areas of the first sealing ring 32 and the second sealing ring 33 are the same. Thus the thrust and pressure can be considered approximately equal, so that when the switching member 3 is in the first position, the switching member 3 is substantially unaffected by the pressure or thrust from the water flow. Therefore, the user only needs to overcome the elastic restoring force of the elastic member 36 to operate the actuating member 2, so that the actuating member 2 drives the switching member 3 to move to the second position.

When the switching member 3 is in the second position, the cavity 13 communicates with the water inlet passage 12 and the water outlet passage 11, and the water flowing through the cavity 13 is partially drained into the letting space 131 by the through hole 31. At this time, the force analysis of the switching member 3 shows that only the portion corresponding to the receiving chamber 351 and the connecting rod 34 is only subjected to the pressure from the water flow, and the remaining portions are subjected to the pressure and thrust from the water flow, and the thrust and the pressure are partially offset. The switching member is only subjected to pressure, that is, the switching member is only subjected to the pressure received by the corresponding cross-sectional area of the connecting rod 34 and the restoring force of the elastic member 36, due to the pressure of the connecting portion 34 corresponding to the cross-sectional area and the restoring force of the spring. The direction is the same, so the elastic returning force of the spring required for the switching member 3 to return to the first position can be relatively small, and the spring member is reduced on the spring member to actuate the switching member 3 from the first position to the second position. The required switching force is reduced; at the same time, since the cross-sectional area of the connecting rod 34 is small, the water pressure applied to the portion is also small, so that the operating force required to maintain the switching member 3 in the second position is also small.

Referring further to FIG. 4, the measured values of the switching force of the above-mentioned labor-saving spray gun under different pressure states are given. It can be seen that as the pressure increases, the flow rate also increases linearly, but the switching force increases with the pressure. It is not a linear increase, but the increase is very slow. Therefore, in a case where the labor-saving spray gun provided by the embodiment has different flow rates, the switching force can be kept substantially constant, and the labor-saving effect is achieved.

The specific structure of the embodiment is as follows: the switching member 3 is a valve core, one end of which is a connecting rod 34 connected in series with the starting member, and the other end is a mounting seat 35 that cooperates with the cavity 13 . The first sealing ring 32 and the second sealing ring 33 are disposed in parallel on the outer circumference of the mounting seat 35. The mounting seat 35 has a bottom opening receiving cavity 351 therein. The through hole 31 is disposed in the mounting. The outer circumference of the seat 35 is connected to the accommodating cavity 351.

The inner body 1 is provided with an inner sleeve 4, and the inner sleeve 4 is provided with a water outlet chamber 41, a water inlet chamber 42 and a mounting cavity 43; the axial center line of the installation chamber 43 is perpendicular to the axial center line of the water inlet chamber 42, and the water inlet chamber The water outlet 421 of the 42 is located above the mounting cavity 43; the water inlet end 411 of the water outlet chamber 41 is located at the middle of the mounting cavity 43; the switching member 3 (spool) is mounted in the mounting cavity 43 of the inner sleeve 4, and the upper end of the mounting seat 35 The guiding hole 44 is disposed in the guiding hole 44. The guiding member 44 is disposed in the guiding hole 44. The elastic member 36 (spring) is connected to the guiding post 441, and the other end abuts against the receiving cavity 35 of the mounting seat 35 to form an elastic connection.

The embodiment further includes the following preferred design: the starting member 2 is a button, and the bottom thereof is connected with the connecting rod 34.

The body 1 includes a water outlet portion and a grip portion, and a portion of the grip portion corresponding to the thumb is provided with a button mounting groove that communicates with the cavity 13.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Industrial applicability

The utility model relates to a labor-saving spray gun. When the actuating member is closed, the switching member is simultaneously subjected to the pressure and thrust of the water flow, so that the user only needs to overcome the elastic force of the elastic member to start the starting member, the required force is small, and the pressing feel is better. After the starting member is opened, since the switching member has a through hole, the user only needs to overcome the water pressure received by the connecting rod portion and the restoring force of the elastic member to maintain the starting member in the starting state, and the required force is small, further Increased the use of the feel.

Claims

A labor-saving spray gun, comprising: a body, a starting member and a switching member; the starting member and the switching member are connected in series, and the operating member is operated to control the switching member to switch between the first position and the second position When the switching member is in the first position, the water outlet passage and the water inlet passage in the body are separated; when the switching member is in the second position, the water outlet passage in the body is in communication with the water inlet passage;

The body is provided with a cavity respectively connecting the water outlet passage and the water inlet passage, and the switching member is installed in the cavity; the cavity has a letting space, so that the switching member is in the first position and Switching between the second positions;

The switching member has a through hole, and the through hole drains a water portion in the cavity into the yield space when the switching member is in the second position.
A labor-saving spray gun according to claim 1, wherein said switching member is provided with a first sealing ring and a second sealing ring; and when said switching member is in the first position, said first sealing ring and The second seal ring receives the thrust and pressure from the water flow in the inlet passage, respectively.
A labor-saving spray gun according to claim 2, wherein when the switching member is in the first position, the first sealing ring is positioned lower than the water outlet end of the water inlet passage; the second sealing ring The position is higher than the water outlet end of the water inlet channel.
A labor-saving spray gun according to claim 3, wherein said first sealing ring seals the communication between said cavity and the water inlet passage and the water outlet passage when said switching member is in the first position; The second seal will isolate the space from the inlet and outlet channels.
A labor-saving spray gun according to claim 4, wherein the switching member is a valve core, one end of which is a connecting rod connected in series with the starting member, and the other end is matched with the cavity. a mounting seat, the first sealing ring and the second sealing ring are disposed in parallel with the outer circumference of the mounting seat; the mounting seat has an upper opening receiving cavity; the through hole is disposed at the mounting seat The outer circumference is connected to the accommodating cavity.
A labor-saving spray gun according to claim 5, wherein the accommodating chamber is provided with an elastic member, and the mounting seat is elastically mounted in the cavity.
A labor saving spray gun according to claim 6, wherein said elastic member is a spring.
A labor-saving spray gun according to claim 6, wherein the actuating member is a button, and the bottom portion thereof is coupled to the connecting rod.
A labor-saving spray gun according to claim 8, wherein the body comprises a water outlet portion and a grip portion, and a portion of the grip portion corresponding to the thumb is provided with a button mounting groove connected to the cavity. .
A labor-saving spray gun according to any one of claims 2-9, wherein the first sealing ring and the second sealing ring have the same force receiving area when the switching member is in the first position.
A labor-saving spray gun according to claim 1 or 4, wherein the body 1 is provided with an inner sleeve, the inner sleeve is provided with a water outlet chamber, a water inlet chamber and a mounting cavity; The axis of the water chamber is perpendicular, and the water outlet of the inlet chamber is located above the installation chamber; the inlet end of the outlet chamber is located in the middle of the installation chamber.
A labor-saving spray gun according to claim 11, wherein the switching member is installed in the mounting cavity of the inner sleeve, and the upper end of the mounting seat extends to the guiding hole; the guiding hole is provided with a guiding column, and the elastic member is provided at one end. It is connected to the guide post, and the other end abuts against the mounting cavity of the mount to form an elastic connection.