Pressurized spray head with leak prevention mechanism

Abstract

We provide a pressurized spray head equipped with a water leakage prevention mechanism. [Solution] The pressurized spray head has a spray head body 10 having an insertion part 11, and an upper groove 21 and a lower groove 22 that are in communication with it. The insertion part has a connecting rod 20 inserted into the upper groove and having an inner wall, and an inner ring part 31 and an outer ring part 32 that are connected to it. The inner ring part has a through hole 311. The connecting rod has a sleeve 30 inserted into the through hole, an upper spring 40 covering the connecting rod, a piston rod 50 inserted into the lower groove of the connecting rod, an inner upper end extension 61, an outer upper end extension 62, an inner lower end extension 63, and an outer lower end extension 64. The inner upper end extension is partially inserted into the lower groove of the connecting rod. The piston 60 further has a piston through hole 66, and the piston rod is inserted through the piston through hole.

Description

Technical Field

[0001] The present invention relates to a spray head, and more particularly to a pressure accumulator type spray head provided with a liquid leakage prevention mechanism.

Background Art

[0002] Many of the commonly available spray head designs in the market employ simple mechanical principles. A piston and a spring are mounted inside a sleeve. When the piston is pressed, the internal space of the sleeve is compressed to generate a pressure difference, forming a siphon action to absorb the liquid.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the above-mentioned conventional designs have two major drawbacks. The first point is the lack of a liquid leakage prevention function. <! Most spray heads are designed to only handle the situation of being normally used vertically, and the need for preventing liquid leakage when the container is tilted or overturned has not been fully considered. When the container is overturned or the liquid is affected by gravity, the liquid leaks from the minute gaps between the members inside the spray head, resulting in waste of the liquid and contamination of the product. The second point is that the effect of the pressure accumulation function is insufficient. Therefore, when operating the spray product, it is necessary to output a stable pressure from inside the spray head to ensure that the liquid is ejected in a mist form and maintain the atomization effect. However, conventional designs have a structural design that prevents effective pressure accumulation, resulting in the compressed liquid either becoming large mist particles or simply dripping out, which affects the user experience and degrades the product's intended performance.

[0005] In order to increase the pressure output during the process of the spray head being pressed, some conventional designs use a spring structure as the piston return mechanism, and the elastic force supplied by the spring matches the piston's pushing and returning pressures, thereby stabilizing the pressure accumulation and output effect.

[0006] However, while this design enhances the pressure accumulation effect, it also introduces a risk of leakage. If liquid seeps into the gap in the structure between the piston and the connecting rod, there is a very high probability that it will flow into the spring area, potentially immersing the spring in the liquid for an extended period. This can not only alter or contaminate the liquid, but also affect the spring's return elasticity and overall lifespan, and even cause the entire spray head to malfunction.

[0007] In conventional patent documents, for example, Patent Document 1 discloses a leak prevention structure in which a connecting rod is directly pressed by the piston end, forming a leak prevention point that prevents the passage of liquid. However, while the aforementioned design initially provides a basic sealing effect, in the case of liquids containing oil, a phenomenon tends to occur where a part of the piston expands outward during the reciprocating motion, creating a tiny gap between the piston and the connecting rod. This gap becomes a potential pathway for liquid leakage, which is particularly pronounced during continuous use or in high-pressure environments, negatively impacting the stability of the seal over long periods of use.

[0008] Therefore, conventional spray heads required a new design in their structural design that combined stable pressure accumulation and leak prevention performance, and in particular, it was necessary to prevent situations where oily liquids would break the seal and cause leakage into the structure.

[0009] This invention was made in view of the circumstances described above, and one of its objectives is to solve the problems described above. In other words, the present invention aims to provide a pressurized spray head equipped with a leak prevention mechanism that offers excellent leak prevention effectiveness and high stability. [Means for solving the problem]

[0010] To achieve the above objective, a pressurized spray head equipped with a leak prevention mechanism, which is one aspect of the present invention, A spray head body having an insertion part, A connecting rod having an upper groove and a lower groove that are in communication with each other, The connecting rod has an upper end and a lower end that are on opposite sides of each other. The upper groove extends to the upper end, The lower groove extends to the lower end, The aforementioned insertion portion is inserted into the upper groove, The upper end portion has a contact portion, The connecting rod comprises a connecting rod having an inner wall and a sleeve having an inner ring portion and an outer ring portion that are connected to it. The inner ring portion has a through hole, and the connecting rod is inserted into the through hole of the sleeve. One end of the aforementioned sleeve comprises a sleeve having an upper surface and an upper spring covering the connecting rod, An upper spring having one end in contact with the contact portion of the connecting rod and the other end in contact with the upper surface of the sleeve; a piston rod inserted into the lower groove of the connecting rod; and a piston having an inner upper extension, an outer upper extension, an inner lower extension, and an outer lower extension. The inner upper end extension is connected to the inner lower end extension, and the outer upper end extension is connected to the outer lower end extension. Between the inner upper end extension and the outer upper end extension, there is an elastic receiving groove. The inner upper end extension is partially inserted into the lower groove of the connecting rod, and the piston further has a piston through hole. The piston rod is provided through the piston through hole. The inner upper end extension is inserted between the piston rod and the connecting rod. The inner upper end extension has a portion protruding outward at the other end connected to the inner lower end extension. The portion protruding outward abuts against the inner wall of the connecting rod. The portion protruding outward and the outer surface of the connecting rod have a piston with a gap, and a lower spring covering the lower end portion of the connecting rod and the inner upper end extension of the piston. The lower spring is inserted into the elastic accommodation groove. One end of the lower spring abuts against the connecting rod. The other end of the lower spring abuts against the piston, and is provided with a lower spring.

Advantages of the Invention

[0011] As described above, the present invention mainly effectively prevents the situation where liquid leaks from between the portion protruding outward and the inner wall by the portion protruding outward abutting against the inner wall of the connecting rod, provides a spray head with excellent leakage prevention effect and high stability, and achieves the purpose.

[0012] From the descriptions of the specification and drawings described later, at least the following matters will become clear.

Brief Description of the Drawings

[0013] [Figure 1A] It is a cross-sectional view showing a pressure accumulator type spray head provided with a liquid leakage prevention mechanism according to an embodiment of the present invention in an ascending state. [Figure 1B] It is a partial cross-sectional view showing a pressure accumulator type spray head provided with a liquid leakage prevention mechanism according to an embodiment of the present invention in an ascending state. [Figure 2A]A cross-sectional view of a pressure accumulator type spray head provided with a liquid leakage prevention mechanism according to an embodiment of the present invention in a depressed state. [Figure 2B] A partial cross-sectional view of a pressure accumulator type spray head provided with a liquid leakage prevention mechanism according to an embodiment of the present invention in a depressed state. **Modes for Carrying Out the Invention**

[0014] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the present invention is not limited to the following examples, and it is needless to say that it can be arbitrarily changed without departing from the gist of the present invention.

[0015] First, a pressure accumulator type spray head provided with a liquid leakage prevention mechanism according to the present invention will be described with reference to FIGS. 1A to 2B.

[0016] One embodiment of a pressure accumulator type spray head provided with a liquid leakage prevention mechanism according to the present invention includes the following configuration.

[0017] The spray head body 10 has an insertion portion 11.

[0018] The connecting rod 20 has upper and lower grooves 21 and 22 that are communicated, and the upper and lower grooves 21 and 22 are directed in opposite directions to each other. The connecting rod 20 has upper and lower end portions 20A and 20B on opposite sides of each other, the upper groove 21 extends to the upper end portion 20A, and the lower groove 22 extends to the lower end portion 20B. The insertion portion 11 is inserted into the upper groove 21, and the upper end portion 20A has a contact portion 23.

[0019] The sleeve 30 has an inner ring portion 31 and an outer ring portion 32 that are connected, and there is a slot 33 between the inner ring portion 31 and the outer ring portion 32. The inner ring portion 31 surrounds a through hole 311, and the connecting rod 20 is inserted into the through hole 311 of the sleeve 30. One end of the sleeve 30 has an upper surface 312, and the upper surface 312 is located at one end of the inner ring portion 31.

[0020] The upper spring 40 covers the connecting rod 20, one end of the upper spring 40 is in contact with the contact portion 23 of the connecting rod 20, and the other end of the upper spring 40 is in contact with the upper surface 312 of the sleeve 30.

[0021] The piston rod 50 is inserted into the lower groove 22 of the connecting rod 20, and the piston rod 50 has a first end 50A and a second end 50B that are on opposite sides of each other. The first end 50A is located within the lower groove 22, and the second end 50B has a stopper portion 51. The stopper portion 51 has a connected inclined portion 511 and a horizontal portion 512, the inclined portion 511 having an inclined surface 511A and the horizontal portion 512 having a horizontal surface 512A.

[0022] The piston 60 has an inner upper end extension 61, an outer upper end extension 62, an inner lower end extension 63, and an outer lower end extension 64. The inner upper end extension 61 is connected to the inner lower end extension 63, and the outer upper end extension 62 is connected to the outer lower end extension 64. An elastic receiving groove 65 is formed by maintaining a certain distance between the inner upper end extension 61 and the outer upper end extension 62. The inner upper end extension 61 is partially inserted into the lower groove 22 of the connecting rod 20, and the piston 60 further has a piston through hole 66. The inner upper end extension 61 and the inner lower end extension 63 are located outside the piston through hole 66, the piston rod 50 is inserted through the piston through hole 66 and is inserted into the lower groove 22 of the connecting rod 20, and the inner upper end extension 61 is inserted between the piston rod 50 and the connecting rod 20. In this embodiment, the inner upper end extension 61 has an outwardly protruding portion 611 at the other end connected to the inner lower end extension 63. Under normal conditions, the outwardly protruding portion 611 abuts against the inner wall 24 of the connecting rod 20, forming frictional contact and effectively preventing the liquid flowing into the lower groove 22 from leaking out toward the elastic receiving groove 65, thereby forming a first liquid leakage prevention structure (see Figure 2B). The inner upper end extension 61 has a stepped surface 613 on its outer side. When the pressurized spray head equipped with the leak prevention mechanism according to the present invention exhibits a depressed state S2, the lower end portion 20B of the connecting rod 20 comes into contact with the stepped surface 613, and a second leak prevention structure is formed. If some leakage occurs in the first leak-prevention structure, the second leak-prevention structure provides a second-stage leak-prevention effect, preventing liquid from flowing into the elastic containment groove 65.

[0023] In one embodiment, the inner upper end extension 61 includes an outwardly protruding portion 611 and an inwardly recessed portion 612. The outwardly protruding portion 611 is connected to the inwardly recessed portion 612, and the inwardly recessed portion 612 is closer to the inner lower end extension 63 than the outwardly protruding portion 611. The diameter of the hole in the outwardly protruding portion 611 is larger than the diameter of the hole in the inwardly recessed portion 612 (see Figure 1B).

[0024] Furthermore, if the outwardly protruding portion 611 does not come into contact with the outer surface 200 of the connecting rod 20, a gap is created between the outwardly protruding portion 611 and the outer surface 200 of the connecting rod 20. Furthermore, a lower receiving groove 67 is formed by leaving a certain distance between the inner lower end extension 63 and the outer lower end extension 64. The horizontal portion 512 is located outside the lower housing groove 67 and is not inserted into the lower housing groove 67, thereby preventing interference with the inner lower end extension 63 and the outer lower end extension 64 so as not to cause wear on the structure.

[0025] The lower spring 70 covers the lower end portion 20B of the connecting rod 20 and the inner upper end extension portion 61 of the piston 60. One end of the lower spring 70 is in contact with the connecting rod 20, and the other end of the lower spring 70 is in contact with the piston 60.

[0026] One end of the main body 80 is inserted into the slot 33 of the sleeve 30, and the main body 80 has a housing space 81. The inner ring portion 31 of the sleeve 30, the lower end portion 20B of the connecting rod 20, the piston 60, and the second end 50B of the piston rod 50 are all located in the housing space 81 of the main body 80. The main body 80 has an inner ring surface 82, and the other end opposite to the connection point of the outer lower end extension 64 and the outer upper end extension 62 of the piston 60 is in contact with an arc-shaped recess formed by the inner ring surface 82 of the main body 80. When in the raised state S1, the frictional contact relationship is maintained, preventing liquid from flowing into the elastic receiving groove 65, and forming third and fourth leak prevention points.

[0027] The gear cover 90, the sleeve 30, a portion of the connecting rod 20, the piston rod 50, and the main body 80 are inserted into the gear cover 90.

[0028] The elastic valve V is located within the main body 80, and there is a certain distance between the elastic valve V and the piston rod 50.

[0029] Furthermore, as shown in Figure 1B, when the pressurized spray head equipped with the leak prevention mechanism according to the present invention is in the raised state S1, the other end of the inner lower end extension 63, which is connected to the inner upper end extension 61, is normally pressed tightly against the inclined surface 511A of the piston rod 50 by the elastic pushing provided by the lower spring 70, forming a fifth leak prevention point. When this point is closed, liquid is sucked in to prevent air leakage, achieving a double effect of preventing unsplashed liquid from leaking out prematurely before the liquid is discharged.

[0030] When the user begins to press, the pressure of the liquid in the containment space 81 gradually increases. When this pressure value exceeds the critical value of the elasticity provided by the lower spring 70, the inner lower end extension 63 is forcibly slightly detached from the inclined surface 511A. This action immediately opens the leak-proof point, allowing the high-pressure liquid to pass at high speed through the channel between the inner lower end extension 63 and the inclined surface 511A, causing the liquid to be released and ejected at high speed. When the user releases the biasing force on the spray head body 10, and the pressure of the liquid in the containment space 81 falls below the elasticity of the lower spring 70, the inner lower end extension 63 quickly contacts and rubs against the inclined surface 511A of the piston rod 50 again, completing the sealing process, accumulating energy, and achieving a pressure accumulation effect. The design of the lower spring's position is a crucial factor, enabling the direct provision of stable leak-prevention preload and achieving good pressure accumulation efficiency by rapidly switching states in response to changes in liquid pressure. Not only does it effectively prevent leakage problems under normal conditions, but it can also improve the injection reaction speed, achieving the effect of quickly opening the channel after the liquid pressure rises and immediately ejecting the liquid.

[0031] The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means devised for each of the different embodiments are also included within the technical scope of the present invention. [Explanation of symbols]

[0032] 10 Spray head body 11 Insertion part 20 connecting rods 200 Exterior 20A upper end 20B Bottom end 21 Kamimizo 22 Lower groove 23 Contact part 24 Inner wall 30 sleeves 31 Inner ring 311 Through hole 312 Top surface 32 Outer ring section 33 slots 40 Upper spring 50 Piston Rod 50A First End 50B 2nd end 51 Stopper part 511 Sloped section 511A Slope 512 horizontal part 512A Horizontal surface 60 pistons 61 Inner top extension 611 Outward protruding part 612 The part that is recessed inward 613 Stepped surface 62 Outer top extension 63 Inner lower end extension 64 Lower outer end extension 65 Elastic receiving groove 66 Piston through holes 67 Lower storage groove 70 Lower spring 80 Main Unit 81 Containment space 82 Inner surface 90 Gear Cover V-shaped elastic valve S1 Ascending state S2 pressed state

Claims

1. A spray head body having an insertion part, A connecting rod having an upper groove and a lower groove that are in communication with each other, The connecting rod has an upper end and a lower end that are on opposite sides of each other. The upper groove extends to the upper end, The lower groove extends to the lower end, The aforementioned insertion portion is inserted into the upper groove, The upper end portion has a contact portion, The connecting rod comprises a connecting rod having an inner wall and a sleeve having an inner ring portion and an outer ring portion that are connected to it. The inner ring portion has a through hole, and the connecting rod is inserted into the through hole of the sleeve. One end of the aforementioned sleeve comprises a sleeve having an upper surface and an upper spring covering the connecting rod, An upper spring having one end in contact with the contact portion of the connecting rod and the other end in contact with the upper surface of the sleeve; a piston rod inserted into the lower groove of the connecting rod; and a piston having an inner upper extension, an outer upper extension, an inner lower extension, and an outer lower extension. The inner upper end extension is connected to the inner lower end extension, and the outer upper end extension is connected to the outer lower end extension. Between the inner upper end extension and the outer upper end extension, there is an elastic receiving groove. The inner upper end extension is partially inserted into the lower groove of the connecting rod, and the piston further has a piston through hole. The piston rod is inserted through the piston through hole, The inner upper end extension is inserted between the piston rod and the connecting rod. The inner upper end extension has a portion that protrudes outward at the other end connected to the inner lower end extension. The portion that protrudes outward is in contact with the inner wall of the connecting rod. The outwardly protruding portion and the outer surface of the connecting rod are provided with a spaced piston and a lower spring covering the lower end of the connecting rod and the inner upper end extension of the piston, The lower spring is inserted into the elastic housing groove, One end of the lower spring is in contact with the connecting rod, The other end of the lower spring is characterized by comprising a lower spring that is in contact with the piston, A pressurized spray head equipped with a leak prevention mechanism.

2. The piston rod has a first end and a second end that are opposite to each other. The first end is located within the lower groove, and the second end has a stopper portion. The stopper portion has a connected inclined portion and a horizontal portion, The inclined portion has an inclined surface, and the horizontal portion has a horizontal surface. When the pressurized spray head equipped with the water leakage prevention mechanism is in an upward position, the other end of the inner lower end extension, which is connected to the inner upper end extension, is in contact with the inclined surface of the piston rod. A pressurized spray head equipped with the water leakage prevention mechanism described in claim 1.

3. Between the inner lower end extension and the outer lower end extension, there is a lower receiving groove. The horizontal portion is characterized in that it is located outside the lower storage groove. A pressurized spray head equipped with the water leakage prevention mechanism described in claim 2.

4. Between the inner ring portion and the outer ring portion, there is a slot, and further comprises a main body. One end of the main body is inserted into the slot of the sleeve, The aforementioned body has a housing space, The inner ring portion of the sleeve, the lower end of the connecting rod, the piston, and the piston rod are located in the housing space of the main body. The main body has an inner ring surface, The outer lower end extension of the piston is characterized in that the other end, which is connected to the outer upper end extension, abuts against the inner ring surface of the main body. A pressurized spray head equipped with the water leakage prevention mechanism described in claim 1.

5. The aforementioned inner upper end extension includes an inwardly recessed portion connected to the outwardly protruding portion, The portion that is recessed inward is closer to the inner lower end extension than the portion that is protruding outward. The diameter of the hole in the outwardly protruding portion is larger than the diameter of the hole in the inwardly recessed portion. A pressurized spray head equipped with the water leakage prevention mechanism described in claim 1.

6. The body further comprises an elastic valve located within the main body, The elastic valve and the piston rod are characterized by being separated by a certain distance. A pressurized spray head equipped with the water leakage prevention mechanism described in claim 4.

7. The gear cover is further comprising the sleeve, the connecting rod, and the piston rod, which are inserted into the gear cover. A pressurized spray head equipped with the water leakage prevention mechanism described in claim 1.

8. The inner upper end extension has a stepped surface, When the pressurized spray head equipped with the water leakage prevention mechanism is in the pressed position, the lower end of the connecting rod is in contact with the stepped surface, characterized in that A pressurized spray head equipped with the water leakage prevention mechanism described in claim 1.

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