CN216187533U

CN216187533U - Emulsion pump easy to assemble

Info

Publication number: CN216187533U
Application number: CN202122741262.1U
Authority: CN
Inventors: 丁祥
Original assignee: Taixing KK Plastic Co ltd
Current assignee: Taixing KK Plastic Co ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-04-05
Anticipated expiration: 2031-11-10

Abstract

The utility model provides an easy emulsion pump of assembly, this emulsion pump is convenient for assemble, wherein, this emulsion pump includes pressure head, facing, cylinder head, piston rod and cylinder, and the lower part at the pressure head is connected to the upper end of piston rod, and the cylinder head links together with the facing to install on the cylinder, be provided with the piston on the piston rod, and the part that is provided with the piston of piston rod stretches into in the inner space of cylinder, and the piston is in sealing contact with the inner wall of cylinder. Wherein, the upper portion of cylinder head is provided with the first flexible wall portion, and in the process of the press-fit of cylinder head on the facing, the first flexible wall portion atress can radially inwards be out of shape, is formed with guide structure at the top of cylinder head for guide the cylinder head in the facing when the press-fit of cylinder head. The construction of the emulsion pump allows for easy and efficient assembly of the emulsion pump.

Description

Emulsion pump easy to assemble

Technical Field

The present invention relates to mechanisms for pumping products such as household chemicals, and in particular to an easily assembled lotion pump.

Background

In the field of products such as household chemicals (e.g., body washes, hand washes, shampoos, etc.), a container containing the product is fitted with an emulsion pump so that a user can easily dispense the product from the container for use. Although referred to herein as an emulsion pump, it may be capable of pumping other fluid or semi-fluid products in addition to emulsions.

The emulsion pump comprises a pressure head, a tooth socket, a cylinder and a cylinder cover. Wherein, the pressure head links to each other with the upper end of piston rod, and the lower extreme of piston rod is provided with the piston to inside stretching into the cylinder. The cylinder cover is arranged on the upper part of the cylinder, the tooth socket is fixedly connected with the cylinder, the tooth socket is connected with the opening part of the container through a structure such as screw threads, and the cylinder extends into the container. The components of the emulsion pump are typically formed by injection molding or the like, and then assembled together in accordance with a predetermined assembly process.

The design of the parts of the emulsion pump is mainly designed according to the functions to be realized by the parts, but the design of the parts does not consider the assembly factors. Therefore, the parts of the lotion pump can not be pressed in place or the parts can crack in the pressing process. If the part is not pressed in place or cracks, the part needs to be disassembled and then reassembled with a new part. This situation may prolong the assembly time of the emulsion pump, reduce the assembly efficiency, and thus increase the manufacturing cost of the emulsion pump.

Therefore, in the field of emulsion pumps, further improvement in the structure of the emulsion pump is required to make the emulsion pump easier to assemble.

SUMMERY OF THE UTILITY MODEL

The present invention has been made to solve the above-mentioned problems occurring in the prior art. The utility model aims to provide a lotion pump with an improved structure, the structure of each part of the lotion pump is designed to be easier to assemble, the probability of part cracking is reduced, the assembly efficiency of the lotion pump is improved, and the manufacturing cost of the lotion pump is saved.

The utility model provides an emulsion pump which is convenient to assemble and comprises a pressure head, a tooth socket, a cylinder cover, a piston rod and a cylinder, wherein the upper end of the piston rod is connected to the lower part of the pressure head, the cylinder cover is connected with the tooth socket and is arranged on the cylinder, a piston is arranged on the piston rod, the part of the piston rod, provided with the piston, extends into the inner space of the cylinder, and the piston is in sealing contact with the inner wall of the cylinder. Wherein, the upper portion of cylinder head is provided with the first flexible wall portion, and in the process of the press-fit of cylinder head on the facing, the first flexible wall portion atress can radially inwards be out of shape, is formed with guide structure at the top of cylinder head for guide the cylinder head in the facing when the press-fit of cylinder head.

In the above structure of the emulsion pump, the provision of the first deformable wall portion can contribute to facilitating press-fitting of the cylinder head to the mouthpiece, and reducing the probability of damage to the cylinder head in the process of fitting the cylinder head to the mouthpiece.

Wherein the guide structure is a slope formed at the top of the cylinder head. The bevel can guide the cylinder head into the correct position in the socket when the cylinder head is assembled.

Preferably, an undercut is formed below the ramp. The undercut prevents the cylinder head from being removed from the socket after the cylinder head is installed in the socket.

Further, a second deformable wall portion is formed on the inner surface of the mouthpiece, the second deformable wall portion extending radially inward and being capable of being forced to deform upward upon contact with the inclined surface.

In a specific structure, at least one of the first deformable wall portion and the second deformable wall portion is a thin wall portion.

Preferably, at least one rib is provided on the second deformable wall portion. The reinforcing rib may reinforce the strength of the second deformable wall portion.

Preferably, the lower end of the cylinder head is formed with a stopping part, and when the piston rod is located at the top dead center of the stroke, the stopping part abuts against the piston to prevent the piston rod from moving upwards continuously.

Preferably, a sealing surface is formed at the lower end of the cylinder head, and the sealing surface is in sealing engagement with the piston when the piston rod is positioned at the top dead center of the stroke.

In another preferred embodiment, at least one locking cam and at least one notch portion are formed on the inner surface of the cylinder head, and at least one locking cam is formed on the outer surface of the piston rod, and the locking cam can be alternately aligned with the locking cam and the notch portion by rotating the ram. Therefore, the emulsion pump can be switched between a locking state and a standby state.

Preferably, an outer ratchet is formed on the outer surface of the cylinder head, an inner ratchet is formed on the inner surface of the cylinder, and the outer ratchet and the inner ratchet are matched with each other to prevent the cylinder head from rotating relative to the cylinder.

Drawings

There is shown in the drawings, which are incorporated herein by reference, non-limiting preferred embodiments of the present invention, the features and advantages of which will be apparent. Wherein:

FIG. 1 is a cross-sectional view of the emulsion pump of the present invention.

FIG. 2 is a cross-sectional view of a cylinder head of the emulsion pump of FIG. 1.

Fig. 3 is a front view of the cylinder head of fig. 2.

Fig. 4 is a top perspective view of the cylinder head of fig. 2.

Fig. 5 is a cross-sectional view of a mouthpiece of the lotion pump of fig. 1.

Figure 6 is a top view of the mouthpiece of figure 5.

Fig. 7 is a cross-sectional view of a cylinder of the emulsion pump of fig. 1.

Fig. 8 is a perspective view of the cylinder of fig. 7.

Fig. 9 is a cross-sectional view of a piston rod of the lotion pump of fig. 1.

Fig. 10 is a sectional view taken along line a-a in fig. 9.

(symbol description)

100 emulsion pump

110 indenter

120 tooth socket

121 second deformable wall part

122 reinforcing bar

130 cylinder head

131 first deformable wall part

132 inclined plane

133 is back-off

134 sealing face

135 stopping part

136 outer ratchet

137 lock head boss

138 notch part

140 piston rod

141 piston

142 tapered end lug

150 cylinder

151 inner ratchet

160 spring

Detailed Description

In order to facilitate understanding of the present invention, specific embodiments thereof will be described in detail below with reference to the accompanying drawings. It is to be understood that only the preferred embodiment of the present invention has been shown in the drawings and should not be considered as limiting the scope of the utility model. Obvious modifications, variations and equivalents will occur to those skilled in the art on the basis of the embodiments shown in the drawings, and the technical features of the different embodiments described below may be combined with each other arbitrarily without contradiction, all of which fall within the scope of the present invention.

In the following detailed description of the present invention, terms indicating directions and orientations such as "up" and "down" are used with reference to a general orientation of the emulsion pump in a use state as shown in the drawings, and it is understood that the orientation of the emulsion pump may be changed in situations such as transportation, storage, and the like.

Fig. 1 shows a cross-sectional view of a lotion pump 100 of the present invention. The lotion pump 100 has a head 110, a mouthpiece 120, a cylinder head 130, a piston rod 140, and a cylinder 150. The upper end of the piston rod 140 is coupled to the lower portion of the ram 110, and the cylinder head 130 is coupled to the mouthpiece 120 and mounted on the cylinder 150. The piston rod 140 is provided with a piston 141, for example, the piston 141 is provided at or near the lower end of the piston rod 140, and the portion of the piston rod 140 provided with the piston 141 protrudes into the inner space of the cylinder 150 through the mouthpiece 120 and the cylinder head 130, and the piston 141 is in sealing contact with the inner wall of the cylinder 150.

As shown in fig. 1, a spring 160 is also optionally provided in the lotion pump 100, the spring 160 being supported between a movable portion of the lotion pump 100, such as the head 110, and a fixed portion, such as the mouthpiece 120, for restoring the head 110 after the head 110 is pressed downward.

Fig. 2-4 show various views of the cylinder head 130 in the emulsion pump 100 of fig. 1, where fig. 2 is a cross-sectional view of the cylinder head 130, fig. 3 is a front view of the cylinder head 130, and fig. 4 is a top perspective view of the cylinder head 130.

The upper portion of the cylinder head 130 is formed with a first deformable wall portion 131, for example, an upwardly extending thin wall portion may be formed at the top of the cylinder head 130. When the cylinder head 130 is pressed into the socket 120, the thin wall portion can be deformed radially inward as it receives a radially inward force.

Correspondingly, as shown in fig. 5 and 6, a second deformable wall portion 121 is formed inside the mouthpiece 120, and the second deformable wall portion 121 is also formed as a thin wall portion, for example, which extends radially inward. In the process of pressing the mouthpiece 120 into the mouthpiece 120, the first deformable wall portion 131 on the cylinder head 130 comes into contact with the second deformable wall portion 121 of the mouthpiece 120 and applies a force thereto, so that the second deformable wall portion 121 is deformed upward. In this way, mounting of the cylinder head 130 to the mouthpiece 120 may be facilitated.

Preferably, a guide structure is further formed on the mouthpiece 120 to play a guiding role when the cylinder head 130 is installed, so as to reduce the situation that parts are not installed in place. For example, as shown in the drawing, a slope 132 is formed at the top of the cylinder head 130, and the slope 132 serves as a guide when the cylinder head 130 is press-fitted to the mouthpiece 120, and helps to force the second deformable wall portion 121 to deform it upward.

Preferably, an undercut 133 is formed below the inclined surface 132, and after the inclined surface 132 passes over the second deformable wall portion 121 upward, the undercut 133 will engage with the second deformable wall portion 121, preventing the cylinder head 130 from coming out downward.

It is further preferable that at least one, preferably a plurality of, reinforcing ribs 122 are provided on the second deformable wall portion 121 to increase the strength of the second deformable wall portion 121. Thus, when the second deformable wall portion 121 is deformed upward by a force, it is not deformed excessively.

In the preferred construction shown in fig. 2, a stopper 135 is formed at the lower end of the cylinder head 130, and when the ram 110 moves upward, the stopper 135 functions as a stopper piston 141, which stops the piston 141 from moving upward beyond its stroke top dead center. Further, a sealing surface 134 is formed at the lower end of the cylinder head 130, for example, the sealing surface 134 is formed as a sealing slope matched with the shape of the piston 141, so that when the ram 110 moves up to the stroke top dead center with the piston rod 140 and the piston 141, the sealing surface 134 forms an interference fit with the piston 141 to form a seal.

In a preferred construction, as shown in FIG. 3, external ratchet teeth 136 are formed on the outer surface of the cylinder head 130. Accordingly, as shown in fig. 7 and 8, an inner ratchet 151 is formed on the inner surface of the cylinder 150. The outer ratchet 136 and the inner ratchet 151 interact to prevent the cylinder head 130 from rotating relative to the cylinder 150.

Further, as shown in fig. 4, at least one lock boss 137 and at least one notch portion 138 are formed on the inner surface of the cylinder head 130. Preferably, a plurality of lock boss 137 and notch portions 138 are alternately formed on the inner surface of the cylinder head 130.

Correspondingly, as shown in fig. 9 and 10, a locking cam 142 is formed on the outer surface of the piston rod 140. When the lock projection 142 of the piston rod 140 is aligned with the lock boss 137 of the cylinder head 130, the interaction between the lock projection 142 and the lock boss 137 will prevent the pressure head 110 from being pressed downward, such that the lotion pump 100 is in a locked state, and when the pressure head 110 is rotated to align the lock projection 142 with the cutaway portion 138, the pressure head 110 will be allowed to be pressed downward, i.e., the lotion pump 100 is set to a standby state.

The installation process of the lotion pump 100 will be explained. First, a pre-assembled cylinder is placed on a mounting plate, such as a gasket, check valve (including valve ball, etc.) and piston, in cylinder 150. Next, the cylinder head 130 is press-fitted into the cylinder 150. Then, the spring 160 is fitted over the piston rod 140, the piston rod 140 is inserted through the cylinder head 130, and is extended into the cylinder 150, and the piston rod 140 is pressed down, so that the piston 141 is fitted over the piston rod 140. At this time, the pump core of the lotion pump 100 is completely assembled. The assembled pump core can be stored and transported independently.

The ram 110 and mouthpiece 120 may be installed on the pump core in the field. The pre-assembled pump core can be matched to different indenters 110 and braces 120.

Claims

1. An emulsion pump comprises a pressure head, a tooth socket, a cylinder cover, a piston rod and a cylinder, wherein the upper end of the piston rod is connected to the lower part of the pressure head, the cylinder cover is connected with the tooth socket and is installed on the cylinder, a piston is arranged on the piston rod, the part of the piston rod, provided with the piston, extends into the inner space of the cylinder, and the piston is in sealing contact with the inner wall of the cylinder;

the cylinder head is characterized in that a first deformable wall part is arranged at the upper part of the cylinder head, the first deformable wall part is stressed to be capable of deforming radially inwards in the process of press-fitting the cylinder head on the tooth socket, and a guide structure is formed at the top of the cylinder head and used for guiding the cylinder head into the tooth socket when the cylinder head is in press-fitting.

2. The emulsion pump of claim 1, wherein the guide structure is a ramp formed at a top of the cylinder head.

3. The emulsion pump of claim 2, wherein an undercut is formed below the ramp.

4. The emulsion pump of claim 2, wherein a second deformable wall portion is formed on the inner surface of the mouthpiece, the second deformable wall portion extending radially inward and being capable of being forced to deform upward when in contact with the ramp.

5. The emulsion pump of claim 4, wherein at least one of the first deformable wall portion and the second deformable wall portion is a thin wall portion.

6. An emulsion pump as claimed in claim 4, wherein at least one reinforcing bead is provided on said second deformable wall portion.

7. The lotion pump of claim 1 wherein said cylinder head defines a stop at a lower end thereof, said stop abutting said piston when said piston rod is at top dead center of travel to prevent further upward movement of said piston rod.

8. The emulsion pump of claim 1, wherein a sealing surface is formed at a lower end of the cylinder head, the sealing surface sealingly engaging the piston when the piston rod is at top dead center of travel.

9. An emulsion pump as recited in claim 1, wherein the cylinder head has at least one lock boss and at least one cutout formed on an inner surface thereof, and the piston rod has at least one lock boss formed on an outer surface thereof, the lock boss being alternately aligned with the lock boss and the cutout by rotating the pressing head.

10. The emulsion pump of claim 1, wherein an outer ratchet is formed on an outer surface of the cylinder head and an inner ratchet is formed on an inner surface of the cylinder head, the outer ratchet and the inner ratchet cooperating to prevent rotation of the cylinder head relative to the cylinder.