WO2021208684A1 - 一种喷头改进结构 - Google Patents

一种喷头改进结构 Download PDF

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Publication number
WO2021208684A1
WO2021208684A1 PCT/CN2021/082509 CN2021082509W WO2021208684A1 WO 2021208684 A1 WO2021208684 A1 WO 2021208684A1 CN 2021082509 W CN2021082509 W CN 2021082509W WO 2021208684 A1 WO2021208684 A1 WO 2021208684A1
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Prior art keywords
piston
valve
pump body
ring
wall
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PCT/CN2021/082509
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English (en)
French (fr)
Inventor
桂仁东
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浙江晟祺实业有限公司
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Priority claimed from CN202020538268.1U external-priority patent/CN212291103U/zh
Priority claimed from CN202021868492.3U external-priority patent/CN212951941U/zh
Application filed by 浙江晟祺实业有限公司 filed Critical 浙江晟祺实业有限公司
Publication of WO2021208684A1 publication Critical patent/WO2021208684A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1073—Springs
    • B05B11/1077—Springs characterised by a particular shape or material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B05B11/1023—Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1043—Sealing or attachment arrangements between pump and container
    • B05B11/1046—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container
    • B05B11/1047—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container the pump being preassembled as an independent unit before being mounted on the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1066—Pump inlet valves
    • B05B11/1067—Pump inlet valves actuated by pressure
    • B05B11/1069—Pump inlet valves actuated by pressure the valve being made of a resiliently deformable material or being urged in a closed position by a spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1073—Springs
    • B05B11/1074—Springs located outside pump chambers

Definitions

  • the utility model relates to an emulsion pump, in particular to an improved structure of a spray head.
  • the lotion pump is widely used in people's daily life. It is used to pump lotion out of daily cleaning and skin care products such as hand soap, shampoo, shower gel, facial cleanser, etc.
  • lotion pumps generally include head caps, piston rods, springs, switches, screw caps, pistons, piston seats, pump bodies, glass beads and other components. Among them, head caps, pistons, etc.
  • head caps, pistons, etc. There is a static fit between the rod and the valve body, which can be regarded as an integral piece, and the piston is located between the piston seat and the piston rod.
  • the technical problem to be solved by the present utility model is to provide an improved structure of the spray head which can prevent the external water from flowing into the bottle body through the gap between the head cap and the pump body in view of the above-mentioned current technical situation.
  • an upper limit step and a lower limit step are formed at the bottom of the switch, and a radial limit boss is formed on the outer wall of the lower end of the piston rod.
  • a radial limit boss is formed on the outer wall of the lower end of the piston rod.
  • the piston includes an outer valve and an inner valve
  • the outer valve is in a concave arc-shaped cylinder and contacts and seals with the inner wall of the pump body, and the inner and outer sides of the inner valve respectively form an inner vertical surface and an outer vertical surface.
  • the inner vertical surface is used to contact and seal with the lower end of the piston rod and the outer wall surface of the radial limit boss
  • the outer vertical surface is used to contact the inner wall surface at the bottom of the switch and located below the lower limit step Contact seal. In this way, good airtightness can be maintained between the piston and the piston rod and between the piston and the switch.
  • the utility model has the advantage that: the improved structure of the spray head installs a plastic spring between the head cap and the spiral ring, so that the head cap has a tendency to reset downward in the pressed state, and, due to the plastic
  • the lower end of the spring is sealed and connected to the spiral ring and the pump body, so when the spray head is used in the shower room, outside water will not flow into the bottle body through the gap between the head cap and the pump body.
  • Figure 8 is a schematic diagram of the structure when the seal adopts marbles.
  • Embodiment 1 As shown in Figures 1 to 4, the improved structure of the spray head of this embodiment includes a head cap 1, a piston rod 2, a switch 3, a coil 4, a piston 5, a piston seat 6, a pump body 7, and a plastic spring 8. , Suction tube 9 and valve plate 10a.
  • the head cap 1 is installed on the piston rod 2, the upper end of the piston seat 6 is inserted into the bottom of the piston rod 2 and forms a static fit with the piston rod 2.
  • the piston 5 is sleeved on the piston rod 2, and the inner wall of the piston 5 is connected to the piston rod.
  • the outer wall of the piston 5 is in contact with the inner wall of the pump body 7, the switch 3 is arranged in the pump body 7, the upper end of the switch 3 abuts against the head cap 1, and the lower end of the switch 3 abuts against the piston 5.
  • the suction pipe 9 is installed at the lower part of the pump body 7. The inside of the pump body 7 and above the suction pipe 9 is reduced in diameter to form a valve port 11 for liquid to pass through.
  • the valve port 11 is installed with a seal for opening or closing the valve port 11.
  • the sealing member is a disc-shaped valve disc 10a.
  • the plastic spring 8 of this embodiment is an external spring, which uses a flat spring without helical shape and a closed structure on the outer peripheral wall.
  • the plastic spring 8 is cylindrical.
  • the plastic spring 8 is installed between the head cap 1 and the spiral ring 4.
  • the headgear 1 maintains a trend of upward reset in the downward pressing state.
  • the specific installation structure of the plastic spring 8 is as follows: the upper end of the plastic spring 8 is installed on the head cap 1, the lower end of the plastic spring 8 is hermetically connected to the spiral ring 4 and the pump body 7, and the lower end of the plastic spring 8 has a radial boss 81, The lower part of the radial boss 81 extends into the pump body 7 and is sealed with the pump body.
  • the top of the coil 4 is formed with a sunken step 42 for accommodating the radial boss 81.
  • the upper end of the piston seat 6 is provided with a vertical through hole 61, and the lower end of the piston seat 6 is provided with a boss 62 for abutting against the piston 5.
  • the horizontal through hole 63 and the vertical through hole 61 constitute a channel for pumping out the lotion.
  • An upper limit step 31 and a lower limit step 32 are formed at the bottom of the switch 3.
  • a radial limit boss 21 is formed on the outer wall of the lower end of the piston rod 2.
  • the radial limit boss 21 and the upper limit The position step 31 abuts, the top of the piston 6 abuts the lower limit step 32, and a movable gap is left between the radial limit boss 21 and the top of the piston 5.
  • the radial limiting boss 21 of the piston rod 2 moves downward to abut against the top of the piston 5, and the piston 5 is disengaged from the switch 3 under the drive of the piston rod 2.
  • the piston 5 includes an outer valve 51 and an inner valve 52.
  • the outer valve 51 is a concave arc-shaped cylinder and contacts and seals with the inner wall surface of the pump body 7.
  • the inner and outer sides of the inner valve 52 respectively form an inner vertical surface and an outer surface. Upright surface, the inner upright surface is used to contact and seal with the lower end of the piston rod 2 and the outer wall surface of the radial limit boss 21, and the outer upright surface is used to contact and seal the inner wall surface at the bottom of the switch 3 and below the lower limit step 32 .
  • the working principle of the nozzle is as follows:
  • valve body 11b With such a structure, it is convenient to use the relatively narrow and long space in the axial direction formed by the straight cylinder section 74 and the second tapered sleeve section 75 to install the valve body 11b, and during use, the valve ring 101 and the spool 103 are respectively connected to The outside and inside of the piston seat 6 are mutually offset, which is beneficial to improve the stability of the fit and the sealing performance.
  • the elastic member 102 includes three second elastic strips extending in a spiral shape, and the second elastic strips are integrally formed with the valve ring 101 and the spool 103.
  • the above-mentioned structure can make the valve body 11b itself have good elasticity, improve the sealing performance, and the integrally formed structure is convenient for production and manufacture.
  • the inner wall of the straight section 74 of the pump body 7 is provided with a step 741.
  • the outer edge of the valve ring 101 abuts on the step 741.
  • the upper edge of the ring 101 abuts against the limiting ribs 742, and the lower end of the valve ring 101 has an inserting portion 1011 that can go down over the step 741 and mate with the inner wall of the straight cylinder section 74.
  • the outer peripheral wall of the lower part of the spool 103 forms a circular arc surface 1031 that can be elastically compressed with the inner wall near the lower port of the second tapered sleeve section 75.
  • the step 741 and the limiting rib 742 are convenient for constraining the valve body 11b in the pump body 7, and the arrangement of the insertion portion 1011 and the arc surface 1031 is beneficial to further improve the sealing performance.
  • the central part of the bottom of the piston seat 6 is provided with a pressure column 64 extending downward so as to pass through the valve ring 101 and abut against the top wall of the spool 103.
  • a pressure supply column 64 is opened on the top of the spool 103.
  • Positioning hole 1032 that extends into.
  • the head cap 1 and the piston rod 2 and the piston seat 6 move downward together; due to the friction between the piston 5 and the pump body 7, the piston 5 and the piston seat 6 move relative to each other, and the piston 5 is separated from the boss 62 of the piston seat 6, and a gap is formed between the two; when the piston 5 relatively moves to the radial limit boss 21 of the piston rod 2, the head cap 1, the piston rod 2, the piston seat 6 and the piston 5 moves downward together, the plastic spring 8 is compressed, the pressure column 64 of the piston seat 6 presses the valve column 103 downward to seal, separates the pump cavity from the bottle body, and discharges the air in the pump cavity.
  • the head cap 1 When the head cap 1 is released by hand, the head cap 1 is not under the action of downward force. Under the elastic force of the plastic spring 8, the piston seat 6, the piston rod 2 and the head cap 1 move upwards, because the piston 5 and the pump There is friction between the body 7 and the piston 5 and the piston seat 6 move relative to each other. The piston 5 returns to the boss 62 of the piston seat 6 to form a seal with the piston seat 6. After that, the piston seat 6, the piston rod 2, the piston 5 and the head cap 1 continue to move upwards, the pressure of the piston seat 6 on the valve body 11b is cancelled, and under the action of atmospheric pressure, a gap is formed between the spool 103 and the valve port 11, and the liquid in the bottle is sucked into the pump body 7. The gas outside the pump enters the bottle body along the gap between the switch 3 and the piston rod 2 and enters the bottle body through the air inlet 72 in the middle of the pump body 7;
  • the liquid in the bottle is continuously discharged from the pump; when not in use, the head cap 1 is rotated in the opposite direction. At this time, the head cap 1 is restricted and cannot be pressed down.
  • the sealing element of the present invention can also use marbles as shown in FIG. 8 as the sealing element.
  • the marbles in FIG. Open or close the valve port.

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  • Reciprocating Pumps (AREA)
  • Closures For Containers (AREA)

Abstract

一种喷头改进结构，其活塞座的上端部插入活塞杆的底部并与活塞杆形成静态配合，活塞套设在所述活塞杆上，活塞的内壁与活塞杆形成动态密封配合，活塞的外壁与泵体内壁相接触，开关设于泵体内，开关的上端与头帽相抵，开关的下端与活塞相抵，头帽与螺圈之间安装有使头帽在下按状态下保持有向上复位的塑料弹簧，塑料弹簧的外周壁为封闭结构，塑料弹簧的上端安装在头帽上，塑料弹簧的下端密封连接在所述螺圈和泵体上。该喷头改进结构通过在头帽与螺圈之间安装塑料弹簧，由于塑料弹簧的下端密封连接在螺圈和泵体上，因此喷头在淋浴房使用时，外界的水不会通过头帽与泵体之间的间隙流到瓶体内。

Description

一种喷头改进结构 技术领域
本实用新型涉及一种乳液泵，尤其是涉及一种喷头改进结构。
背景技术
乳液泵在人们的日常生活中得到了广泛使用，其用于洗手液、洗发露、沐浴露、洗面奶等日常清洁及护肤产品中将乳液泵出。现有的乳液泵结构形式有很多，各种乳液泵一般都包括有头帽、活塞杆、弹簧、开关、螺纹盖、活塞、活塞座、泵体及玻璃珠等组件，其中，头帽、活塞杆及阀体之间是静态配合，可以看作是一体件，活塞则位于活塞座和活塞杆之间。需要泵出乳液时，往下按压头帽，活塞杆和阀体随之往下移动，弹簧被压缩，并同时带动活塞向下移动，将预先存放在泵体内的乳液泵出。乳液被泵出后，松开手，在弹簧的弹力下，活塞、阀体、活塞杆及头帽往上移动，乳液再次被密封在泵体内部。现有的乳液泵的头帽与泵体之间一般都存在有间隙，乳液泵在淋浴房使用时，外界的水会通过头帽与泵体之间的间隙流入瓶体内，容易导致瓶体内的乳液混入水，影响到乳液的质量。
发明内容
本实用新型所要解决的技术问题是针对上述现有技术现状，提供一种能够避免外界水通过头帽与泵体间的间隙流入瓶体内的喷头改进结构。
本实用新型解决上述技术问题所采用的技术方案为：该喷头改进结构包括头帽、活塞杆、开关、螺圈、活塞、活塞座和泵体，所述头帽安装在活塞杆上，所述活塞座的上端部插入活塞杆的底部并与活塞杆形成静态配合，所述活塞套设在所述活塞杆上，活塞的内壁与活塞杆形成动态密封配合，活塞的外壁与泵体内壁相接触，所述开关设于泵体内，开关的上端与头帽相抵，开关的下端与活塞相抵，其特征在于：所述头帽与螺圈之间安装有使头帽在下按状态下保持有向上复位的塑料弹簧，所述塑料弹簧的外周壁为封闭结构，所述塑料弹簧的上端安装在头帽上，塑料弹簧的下端密封连接在所述螺圈和泵体上。
为了使塑料弹簧与螺圈、泵体具有良好的密封性，所述塑料弹簧的下端具有径向凸台，径向凸台的下部伸入所述泵体内并与泵体相密封，所述径向凸台与泵体上沿之间留有环形间隙，所述螺圈上部具有径向卡入所述环形间隙内的卡环；所述螺圈的顶部可以成型有用来容置所述径向凸台的下沉台阶。
优选地，所述塑料弹簧采用无螺旋状的扁平弹簧。采用扁平弹簧，可以提高密封性。
优选地，在所述泵体下部连接有吸管，所述泵体内部并位于吸管上方内径减小形成有供液体通过的阀口，阀口处安装有用于将阀口打开或封闭的密封件，该密封件可以采用不同的阀件来实现，如该密封件采用阀片，所述阀片具有外圈及通过第一弹性条连接在该外圈中的内片，所述阀片约束在阀口上方，所述内片在自然状态下将阀口封闭、在受到向上的挤压力状态下将阀口打开；或者，所述的密封件为阀体，它包括阀圈、弹性件及阀柱，所述阀圈约束在泵体中且位于阀口上方，所述弹性件的上端与阀圈相连接，所述弹性件的下端与阀柱相连接，所述弹性件使阀柱始终保持向下移动从而将阀口封闭的趋势，采用该结构，能降低泵体下部的斜度从而方便注塑且能进一步提高密封性；或者，所述的密封件为弹珠，所述弹珠能上下移动地置于阀口上。
当然，除了采用上述阀片、阀体或弹珠的方式外，还可以采用其它阀结构型式来实现。当密封件采用上述的阀体时，所述泵体下部的内径逐渐收缩形成有自上而下依次衔接的第一锥形套段、直筒段及第二锥形套段，所述第二锥形套段的下端口形成所述的阀口，所述的阀体安装在所述直筒段内并向下延伸至第二锥形套段，且所述的阀圈约束在泵体的直筒段内。采用这样的结构，能降低泵体下部的斜度从而方便注塑，且便于利用直筒段及第二锥形套段形成的在轴向上较为狭长的空间对阀进行安装，且在使用过程中，阀圈与阀柱分别与活塞座的外部、内部相抵，有利于提高配合稳定性及密封性。所述阀体的弹性件包括呈至少两条呈螺旋状延伸的弹性条，该弹性条与所述阀圈、阀柱一体成型。上述结构可使阀本身具有很好的弹性，提高密封性，一体成型的结构便于生产制造。
为了便于装配，所述泵体直筒段的内壁上设置有台阶，所述阀圈的外边缘抵靠在该台阶上，所述泵体直筒段的内壁上设置有位于台阶上方且与阀圈上边缘相抵的限位凸筋，所述阀圈下端具有能向下越过台阶与直筒段的内壁相插配的插接部。所述阀柱至少下部的外周壁形成能与第二锥形套段下端口附近的内壁弹性压紧的圆弧面。上述台阶与限位凸筋便于将阀约束在泵体中，而插接部与圆弧面的设置有利于进一步提高密封性。
优选地，所述活塞座底部的中央部位设置有向下延伸从而能穿过阀圈与阀柱的顶壁相抵的压柱，相应的，所述阀柱的顶部开有供压柱伸入的定位孔。在活塞座对阀进行抵压时，活塞座的底部边缘抵靠在阀圈上，压柱向下抵压阀柱，有利于提高密封性。
为了使喷头工作时，乳液能通过活塞座顺利流入活塞杆的内部，所述活塞座的上端部开有竖向通孔，在活塞座的下端部设有用来与活塞相抵的凸台，在所述凸台的上方开有与所述竖向通孔相贯通的横向通孔。
进一步优选地，在所述开关的底部形成有上限位台阶和下限位台阶，所述活塞杆下端部的外壁上形成有径向限位凸台，在开关关闭状态下，所述径向限位凸台与上限位台阶相抵，所述的活塞顶部与下限位台阶相抵，且径向限位凸台与所述活塞顶部之间留有 活动间隙，在开关打开状态下，所述活塞杆的径向限位凸台向下移动至与活塞顶部相抵，所述活塞在活塞杆的带动下与所述的开关相脱离。
进一步优选地，所述的活塞包括有外瓣膜和内瓣膜，所述外瓣膜呈内凹弧形筒体并与泵体内壁面接触密封，所述内瓣膜的内外侧面分别形成内直立面和外直立面，所述内直立面用来与活塞杆下端部并位于径向限位凸台的外壁面接触密封，所述的外直立面用来与所述开关底部并位于下限位台阶下方的内壁面接触密封。这样，活塞与活塞杆以及活塞与开关之间均能保持良好的密封性。
进一步优选地，所述活塞上下两端最大边的唇沿与所述泵体过盈滑动配合，活塞内孔与活塞杆形成过盈密封滑动配合，并且，所述活塞与泵体之间的摩擦力大于活塞与活塞杆之间的摩擦力。这样，活塞沿泵体内壁运动过程中能与活塞座之间产生相对运动，从而顺利实现乳液的泵出。
与现有技术相比，本实用新型的优点在于：该喷头改进结构通过在头帽与螺圈之间安装塑料弹簧，使头帽在下按状态下保持有向下复位的趋势，并且，由于塑料弹簧的下端密封连接在螺圈和泵体上，因此喷头在淋浴房使用时，外界的水不会通过头帽与泵体之间的间隙流到瓶体内。
附图说明
图1为本实用新型实施例一的结构示意图。
图2为本实用新型实施例一的立体分解示意图。
图3为本实用新型实施例一的结构剖视图。
图4为本实用新型实施例一的阀片示意图。
图5为本实用新型实施例二的结构剖视图。
图6为图5的局部结构放大图。
图7为本实用新型实施例二中的阀体示意图。
图8为密封件采用弹珠时的结构示意图。
具体实施方式
以下结合附图实施例对本实用新型作进一步详细描述。
实施例一：如图1至图4所示，本实施例的喷头改进结构包括头帽1、活塞杆2、开关3、螺圈4、活塞5、活塞座6、泵体7、塑料弹簧8、吸管9和阀片10a。其中，头帽1安装在活塞杆2上，活塞座6的上端部插入活塞杆2的底部并与活塞杆2形成静态配合，活塞5套设在活塞杆2上，活塞5的内壁与活塞杆2形成动态密封配合，活塞5的外壁与泵体7内壁相接触，开关3设于泵体7内，开关3的上端与头帽1相抵，开关 3的下端与活塞5相抵。吸管9安装在泵体7的下部，泵体7内部并位于吸管9上方内径减小形成有供液体通过的阀口11，阀口11处安装有用于将阀口11打开或封闭的密封件，该密封件为一圆盘状阀片10a。
具体如图4所示，阀片10a为通过注塑一体成型的塑料件，它具有外圈104及通过第一弹性条105连接在该外圈104中的内片106，阀片10a通过紧配方式安装在阀口11上方，内片106在自然状态下将阀口11封闭、在受到向上的挤压力状态下将阀口11打开。
本实施例的塑料弹簧8为外置弹簧，采用无螺旋状的扁平弹簧且外周壁为封闭结构，塑料弹簧8呈筒状，塑料弹簧8安装在头帽1与螺圈4之间安装有使头帽1在下按状态下保持有向上复位的趋势。塑料弹簧8的具体安装结构如下：塑料弹簧8的上端安装在头帽1上，塑料弹簧8的下端密封连接在螺圈4和泵体7上，塑料弹簧8的下端具有径向凸台81，径向凸台81的下部伸入泵体7内并与泵体相密封，径向凸台81与泵体上沿71之间留有环形间隙，螺圈4上部具有径向卡入环形间隙内的卡环41，塑料弹簧8与螺帽4、泵体7均实现过盈配合，密封型好。此外，螺圈4的顶部成型有用来容置径向凸台81的下沉台阶42。
该喷头的塑料弹簧采用上述安装结构后，可以确保塑料弹簧8与泵体7、螺圈4之间的密封性，在淋浴房使用时，外界的水不会通过头帽1与泵体7之间的间隙流到瓶体(图中未示)内。
本实施例中，活塞座6的上端部开有竖向通孔61，在活塞座6的下端部设有用来与活塞5相抵的凸台62，在凸台62的上方开有与竖向通孔61相贯通的横向通孔63。横向通孔63和竖向通孔61构成供乳液泵出的通道。
在开关3的底部形成有上限位台阶31和下限位台阶32，活塞杆2下端部的外壁上形成有径向限位凸台21，在开关关闭状态下，径向限位凸台21与上限位台阶31相抵，活塞6顶部与下限位台阶32相抵，且径向限位凸台21与活塞5顶部之间留有活动间隙。在开关打开状态下，活塞杆2的径向限位凸台21向下移动至与活塞5顶部相抵，活塞5在活塞杆2的带动下与开关3相脱离。为了使活塞5沿泵体7内壁运动过程中，活塞5能与活塞座6之间产生相对运动，活塞5上下两端最大边的唇沿与泵体7过盈滑动配合，活塞5内孔与活塞杆2形成过盈密封滑动配合，并且，活塞5与泵体7之间的摩擦力大于活塞5与活塞杆2之间的摩擦力。
为了使活塞5与活塞杆2以及活塞5与开关3之间均能保持良好的密封性。本实施例中，活塞5包括有外瓣膜51和内瓣膜52，外瓣膜51呈内凹弧形筒体并与泵体7内壁面接触密封，内瓣膜52的内外侧面分别形成内直立面和外直立面，内直立面用来与活塞杆2下端部并位于径向限位凸台21的外壁面接触密封，外直立面用来与开关3底部并位于下限位台阶32下方的内壁面接触密封。
该喷头的工作原理如下：
先将螺圈4与瓶体(图中未示)配合旋紧，使用时，先将头帽1旋转打开，用手按压头帽1，头帽1受力向下运动。由于头帽1和活塞杆2、活塞座6组装在一起，头帽1和活塞杆2、活塞座6一起向下运动。由于活塞5与泵体7之间有摩擦力，活塞5与活塞座6发生相对运动，活塞5与活塞座6的凸台62分离，两者之间形成间隙。当活塞5相对移动至活塞杆2的径向限位凸台21时，头帽1、活塞杆2、活塞座6和活塞5才一起向下运动，塑料弹簧8被压缩。当手松开头帽1，此时头帽1没有受到向下力的作用，在塑料弹簧8弹力的作用下，活塞座6、活塞杆2和头帽1作向上运动，由于活塞5与泵体7之间有摩擦力，活塞5与活塞座6发生相对运动，活塞5又重新回到活塞座6的凸台62而与活塞座6形成密封，此后，活塞座6、活塞杆2、活塞5和头帽1继续向上运动，受大气压作用，瓶内的液体被吸入泵体7内，此时泵外面的气体沿着开关3与活塞杆2之间的间隙并通过泵体7中间的进气孔72进入瓶体内填充。如此往复，瓶内的液体不断地从泵内排出。不用时，沿相反方向旋转头帽1，此时头帽1被限位而不能下压。
实施例二：本实施例采用了不同于实施例一的密封件结构，且对泵体下部的内部结构也作了适应性改变。
具体如图5-图7所示，上述泵体7下部的内径逐渐收缩形成自上而下依次衔接的第一锥形套段73、直筒段74及第二锥形套段75，第二锥形套段75的下端口形成供液体通过的阀口11，阀体10b约束在直筒段74内且向下延伸至第二锥形套段75的下端，该阀体10b的下端为能将阀口11打开或关闭的阀柱103。
具体的，阀体11b包括阀圈101、弹性件102及阀柱103，阀圈101约束在泵体7的直筒段74内，弹性件102的上端与阀圈101相连接，弹性件102的下端与阀柱103相连接，弹性件102使阀柱103始终保持与阀圈101相背离的趋势。采用这样的结构，便于利用直筒段74及第二锥形套段75形成的在轴向上较为狭长的空间对阀体11b进行安装，且在使用过程中，阀圈101与阀柱103分别与活塞座6的外部、内部相抵，有利于提高配合稳定性及密封性。
上述弹性件102包括三条呈螺旋状延伸的第二弹性条，该第二弹性条与阀圈101、阀柱103一体成型。上述结构可使阀体11b本身具有很好的弹性，提高密封性，一体成型的结构便于生产制造。
为了便于装配，泵体7直筒段74的内壁上设置有台阶741，阀圈101的外边缘抵靠在该台阶741上，泵体7直筒段74的内壁上设置有位于台阶741上方且与阀圈101上边缘相抵的限位凸筋742，阀圈101下端具有能向下越过台阶741与直筒段74的内壁相插配的插接部1011。阀柱103下部的外周壁形成能与第二锥形套段75下端口附近的 内壁弹性压紧的圆弧面1031。上述台阶741与限位凸筋742便于将阀体11b约束在泵体7中，而插接部1011与圆弧面1031的设置有利于进一步提高密封性。
本实施例中活塞座6底部的中央部位设置有向下延伸从而能穿过阀圈101与阀柱103的顶壁相抵的压柱64，相应的，阀柱103的顶部开有供压柱64伸入的定位孔1032。在活塞座6对阀体11b进行抵压时，活塞座6的底部边缘抵靠在阀圈101上，压柱64向下抵压阀柱103，有利于提高密封性。
本实施例喷头的工作原理如下：
将螺圈4与瓶体(图中未示)配合旋紧，使用时，先将头帽1旋转打开，用手按压头帽1，头帽1受力向下运动；由于头帽1和活塞杆2、活塞座6组装在一起，头帽1和活塞杆2、活塞座6一起向下运动；由于活塞5与泵体7之间有摩擦力，活塞5与活塞座6发生相对运动，活塞5与活塞座6的凸台62分离，两者之间形成间隙；当活塞5相对移动至活塞杆2的径向限位凸台21时，头帽1、活塞杆2、活塞座6和活塞5才一起向下运动，塑料弹簧8被压缩，活塞座6的压柱64向下抵压阀柱103密封，将泵腔与瓶体分隔开，排出泵腔中的空气。
当手松开头帽1，此时头帽1没有受到向下力的作用，在塑料弹簧8弹力的作用下，活塞座6、活塞杆2和头帽1作向上运动，由于活塞5与泵体7之间有摩擦力，活塞5与活塞座6发生相对运动，活塞5又重新回到活塞座6的凸台62而与活塞座6形成密封，此后，活塞座6、活塞杆2、活塞5和头帽1继续向上运动，活塞座6对阀体11b的抵压力取消，受大气压作用，阀柱103与阀口11之间产生间隙，瓶内的液体被吸入泵体7内，此时泵外面的气体沿着开关3与活塞杆2之间的间隙并通过泵体7中间的进气孔72进入瓶体内填充；
如此往复，瓶内的液体不断地从泵内排出；不用时，沿相反方向旋转头帽1，此时头帽1被限位而不能下压。
采用本阀体11b结构，能降低泵体下部的斜度，便于注塑生产，且由于阀在泵体轴向上的高度增大、跨越直筒段与第二锥形套段，有利于增大压缩量，提高密封性。
当然，本实用新型的密封件除了采用上述阀片、阀体外，也可以采用如图8所示的弹珠等作为密封件，如图8中的弹珠能上下活动地置于阀口上，以打开或封闭阀口。

Claims (11)

  1. 一种喷头改进结构，包括头帽(1)、活塞杆(2)、开关(3)、螺圈(4)、活塞(5)、活塞座(6)和泵体(7)，所述头帽(1)安装在活塞杆(2)上，所述活塞座(6)的上端部插入活塞杆(2)的底部并与活塞杆(2)形成静态配合，所述活塞(5)套设在所述活塞杆(2)上，活塞(5)的内壁与活塞杆(2)形成动态密封配合，活塞(5)的外壁与泵体(7)内壁相接触，所述开关(3)设于泵体(7)内，开关(3)的上端与头帽(1)相抵，开关(3)的下端与活塞(5)相抵，其特征在于：所述头帽(1)与螺圈(4)之间安装有使头帽在下按状态下保持有向上复位的塑料弹簧(8)，所述塑料弹簧(8)的外周壁为封闭结构，所述塑料弹簧(8)的上端安装在头帽(1)上，塑料弹簧(8)的下端密封连接在所述螺圈(4)和泵体(7)上。
  2. 根据权利要求1所述的喷头改进结构，其特征在于：所述塑料弹簧(8)的下端具有径向凸台(81)，径向凸台(81)的下部伸入所述泵体(7)内并与泵体相密封，所述径向凸台(81)与泵体上沿(71)之间留有环形间隙，所述螺圈(4)上部具有径向卡入所述环形间隙内的卡环(41)；所述螺圈(4)的顶部成型有用来容置所述径向凸台(81)的下沉台阶(42)。
  3. 根据权利要求1所述的喷头改进结构，其特征在于：所述塑料弹簧(8)采用无螺旋状的扁平弹簧。
  4. 根据权利要求1所述的喷头改进结构，其特征在于：在所述泵体(7)下部连接有吸管(9)，所述泵体(7)内部并位于吸管上方内径减小形成供液体通过的阀口(11)，阀口(11)处安装有用于将阀口(11)打开或封闭的密封件；
    所述的密封件为阀片(10a)，所述阀片(10a)具有外圈(104)及通过第一弹性条(105)连接在该外圈(104)中的内片(106)，所述阀片(10a)约束在阀口(11)上方，所述内片(106)在自然状态下将阀口(11)封闭、在受到向上的挤压力状态下将阀口(11)打开；或者，
    所述的密封件为阀体(10b)，它包括阀圈(101)、弹性件(102)及阀柱(103)，所述阀圈(101)约束在泵体中且位于阀口(11)上方，所述弹性件(102)的上端与阀圈(101)相连接，所述弹性件(102)的下端与阀柱(103)相连接，所述弹性件(102)使阀柱(103)始终保持向下移动从而将阀口(11)封闭的趋势；或者，
    所述的密封件为弹珠(10c)，所述弹珠(10c)能上下移动地置于阀口(11)上。
  5. 根据权利要求4所述的喷头改进结构，其特征在于：所述的密封件为阀体(10b)；相应的，所述泵体(7)其下部的内径逐渐收缩形成有自上而下依次衔接的第一锥形套段(73)、直筒段(74)及第二锥形套段(75)，所述第二锥形套段(75)的下端口形成所述的阀口(11)，所述的阀体(10b)安装在所述直筒段(74)内并向下延伸至第二锥形套段(75)，且所述的阀圈(101)约束在泵体的直筒段(74)内；所述阀体的弹性件(102)包括呈至少两条呈螺旋状延伸的第二弹性条，该第二弹性条与所述阀圈(101)、阀柱(103)一体成型。
  6. 根据权利要求5所述的喷头改进结构，其特征在于：所述泵体直筒段(74)的内壁上设置有台阶(741)，所述阀圈(101)的外边缘抵靠在该台阶(741)上，所述泵体直筒段(74)的内壁上设置有位于台阶(741)上方且与阀圈(101)上边缘相抵的限位凸筋(742)，所述阀圈(101)下端具有能向下越过台阶(741)与直筒段(74)的内壁相插配的插接部(1011)；所述阀柱(103)至少下部的外周壁形成能与第二锥形套段(75)下端口附近的内壁弹性压紧的圆弧面(1031)。
  7. 根据权利要求5所述的喷头改进结构，其特征在于：所述活塞座(6)底部的中央部位设置有向下延伸从而能穿过阀圈(101)与阀柱(103)的顶壁相抵的压柱(64)，相应的，所述阀柱(103)的顶部开有供压柱(64)伸入的定位孔(1032)。
  8. 根据权利要求1至7中任一权利要求所述的喷头改进结构，其特征在于：所述活塞座(6)的上端部开有竖向通孔(61)，在活塞座(6)的下端部设有用来与活塞(5)相抵的凸台(62)，在所述凸台(62)的上方开有与所述竖向通孔(61)相贯通的横向通孔(63)。
  9. 根据权利要求8所述的喷头改进结构，其特征在于：在所述开关(3)的底部形成有上限位台阶(31)和下限位台阶(32)，所述活塞杆(2)下端部的外壁上形成有径向限位凸台(21)，在开关关闭状态下，所述径向限位凸台(21)与上限位台阶(31)相抵，所述的活塞(5)顶部与下限位台阶(32)相抵，且径向限位凸台(21)与所述活塞(5)顶部之间留有活动间隙，在开关打开状态下，所述活塞杆(2)的径向限位凸台(21)向下移动至与活塞(5)顶部相抵，所述活塞(5)在活塞杆(2)的带动下与所述的开关(3)相脱离。
  10. 根据权利要求9所述的喷头改进结构，其特征在于：所述的活塞(5)包括有外瓣膜(51)和内瓣膜(52)，所述外瓣膜(51)呈内凹弧形筒体并与泵体(7)内壁面接触密封，所述内瓣膜(52)的内外侧面分别形成内直立面和外直立面，所述内直立面用来与活塞杆(2)下端部并位于径向限位凸台(21)的外壁面接触密封，所述的外直立面用来与所述开关(3)底部并位于下限位台阶(32)下方的内壁面接触密封。
  11. 根据权利要求8所述的喷头改进结构，其特征在于：所述活塞(5)上下两端最大边的唇沿与所述泵体(7)过盈滑动配合，活塞(5)内孔与活塞杆(2)形成过盈密封滑动配合，并且，所述活塞(5)与泵体(7)之间的摩擦力大于活塞(5)与活塞杆(2)之间的摩擦力。
PCT/CN2021/082509 2020-04-13 2021-03-24 一种喷头改进结构 WO2021208684A1 (zh)

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