CN111392231A

CN111392231A - Emulsion pump

Info

Publication number: CN111392231A
Application number: CN201910004766.XA
Authority: CN
Inventors: 丁要武
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-01-03
Filing date: 2019-01-03
Publication date: 2020-07-10
Also published as: WO2020140514A1; KR20210134897A

Abstract

An emulsion pump comprises an elastic reset mechanism. The elastic return mechanism comprises at least one elastic strip shaped such that, when seen in the axial direction of the lotion pump, the elastic strip extends around at least a portion of the periphery of the cylinder of the lotion pump. Therefore, the structure of the emulsion pump is compact, and the transportation and the storage of products are convenient.

Description

Emulsion pump

Technical Field

The invention relates to a lotion pump, in particular to an all-plastic lotion pump.

Background

Emulsion pumps are widely used in household products such as hand lotions, body washes and the like to pump the product out of a container such as a bottle for use. Most of the currently marketed lotion pumps are provided with a metal spring which enables the lotion pump to be reset for the next use after the user has pressed the lotion pump to pump a certain amount of product from the container for use.

In recent years, with the increasing demand for environmental protection, recycling of emulsion pumps to realize recycling of resources has been demanded. In order to facilitate the recycling of the emulsion pump, a plastic spring is proposed to replace a metal spring in the field of emulsion pump manufacturing, namely an all-plastic emulsion pump. Common forms of plastic springs include plastic threaded springs, plastic bow springs, bellows springs, and the like. However, the plastic spring has problems in that, when the plastic spring is compressed for a long time, it is deformed to yield, so that the elastic force of the plastic spring is attenuated until the spring action is not achieved. In order to avoid the failure of the plastic spring due to long-time compression, one solution is to set the all-plastic lotion pump into an upper lock head form, and to enable the plastic spring to be in a free relaxed state without being pressed when the lotion pump is in a non-use state.

An exemplary lotion pump with a plastic spring is shown in fig. 29. The emulsion pump 1 comprises a pressure head 10, a tooth socket 20, a cylinder 30 and a piston rod 40, wherein one end of a spring 50 is connected to the piston 40, and the other end of the spring is connected to the cylinder 30. When the ram 10 is pressed, the piston rod 40 moves downward, thereby compressing the spring 50, and when the pressing force applied to the ram 10 is removed, the ram 10 is restored by the elastic force of the spring 50. The lotion pump 1 shown in fig. 29 is in the form of an upper locking head, and in a non-use state, for example during transport and display sale of products, the head 10 is at the highest point of its stroke, so that the spring 50 is in a state of low compression force, and thus the spring 50 is not subject to failure due to yielding deformation caused by compression in the non-use state.

It can be seen that the above emulsion pump is an upper lock head type emulsion pump. For the emulsion pump of the upper lock head, the requirement of the e-commerce transportation on the package is sometimes difficult to meet, and the emulsion pump of the upper lock head has higher height in the initial unused state, so that the requirements on the height of a carton, the height of a goods shelf and the like are also higher.

Therefore, in the field of emulsion pumps, there is still a need for an emulsion pump with a plastic spring having a further improved structure, which can satisfy the demand of electric commercial transportation, and further, can solve the problem of the damping of the elastic force of the plastic spring.

Disclosure of Invention

The present invention is made to solve the above-mentioned problems of the prior art emulsion pumps. The invention aims to provide an emulsion pump with an improved structure, which has a compact structure. Furthermore, the emulsion pump can realize a lower lock head. Therefore, the requirement of electric commercial transportation is met.

The emulsion pump comprises a movable part and a fixed part, wherein the movable part comprises a pressure head, a piston rod and a piston, the piston rod is connected to the lower part of the pressure head, the piston is arranged on the piston rod, the fixed part comprises a tooth socket and a cylinder, the cylinder is connected with the tooth socket, and the part, at least provided with the piston, of the piston rod extends into the cylinder, wherein the emulsion pump further comprises: and one end of the elastic resetting mechanism is in contact with or connected with the movable part, and the other end of the elastic resetting mechanism is fixed on the fixed part, wherein the elastic resetting mechanism comprises at least one elastic strip, and the shape of the elastic strip is set to extend around at least one part of the periphery of the cylinder when the elastic strip is seen along the axial direction of the emulsion pump.

With the above structure, the structure of the emulsion pump of the present invention, especially the structure of the portion including the spring below the mouthpiece, is more compact, thereby further facilitating the transportation, storage, etc. of the product.

Preferably, the elastic return mechanism further comprises: the upper end of the elastic strip is connected to the upper spring seat, and/or the lower annular spring seat, and the lower end of the elastic strip is connected to the lower spring seat.

Preferably, the elastic strip is connected to the sprung and/or unsprung seats by a pivot, wherein the pivot pivots and folds when the elastic return means is compressed.

Preferably, a first guide groove is formed on one of the inner side of the upper spring seat and the cylinder, a first guide strip is formed on the other of the inner side of the upper spring seat and the cylinder, and the first guide groove is matched with the first guide strip; and/or a second guide groove is formed on one of the inner side of the lower spring seat and the air cylinder, and a second guide strip is formed on the other of the inner side of the lower spring seat and the air cylinder, and the second guide groove is matched with the second guide strip.

In a further preferred structure, the lower part of the cylinder is provided with a reverse buckling part, and the reverse buckling part is used for fixing a lower spring seat of the elastic resetting mechanism.

Further, the lotion pump of the present invention may further comprise a switching mechanism configured to cooperate with the elastic return mechanism such that when the pressing head is rotated in a first direction and/or moved upward, one end of the elastic return mechanism moves to a first position in a direction toward the other end of the elastic return mechanism, thereby compressing the elastic return mechanism and bringing the elastic return mechanism into a standby state, and when the pressing head is rotated in a second direction opposite to the first direction and/or moved downward, one end of the elastic return mechanism moves to a second position in a direction away from the other end of the elastic return mechanism and bringing the elastic return mechanism into a non-standby state.

Through the arrangement of the switching mechanism, the elastic reset mechanism can be switched between an applicable state and a non-applicable state, and in the non-using state, the elastic reset mechanism can be slightly or not pressed. This configuration is particularly advantageous for plastic springs, which can extend their useful life.

Drawings

In the drawings:

fig. 1 is a side view of a lotion pump according to a first embodiment of the present invention.

FIG. 2 is a partial cutaway view of the lotion pump of FIG. 1 illustrating the internal structure of the lotion pump.

Fig. 3 is a partial perspective view of the lotion pump of fig. 1, including the piston rod, spring and bearing block of the lotion pump.

Fig. 4 shows a cross-sectional view of the lotion pump of fig. 1, in which the lotion pump is in a locked state.

Fig. 5 shows another cross-sectional view of the lotion pump of fig. 1, in which the lotion pump is in a ready-to-use state.

Figures 6a to 6d show the bearing block of the emulsion pump of figure 1, in which figure 6a is a cross-sectional view of the bearing block, figure 6b is another cross-sectional view of the bearing block, figure 6c is a top view of the bearing block and figure 6d is a perspective view of the bearing block.

Fig. 7a and 7b show the piston rod of the lotion pump of fig. 1, wherein fig. 7a is a side view of the piston rod 150 and fig. 7b is a front view of the piston rod.

Figures 8 a-8 c show perspective views of the interaction of the bearing and the piston rod, wherein in figure 8a the bearing is in a first position relative to the piston rod, in figure 8b the bearing is moved towards a second position relative to the piston rod, and in figure 8c the bearing has reached the second position.

Fig. 9a to 9f show springs of the lotion pump of fig. 1, in which fig. 9a is a front view of the springs, fig. 9b is a perspective view of the springs, fig. 9c is a top view of the springs, fig. 9d is a bottom view of the springs, fig. 9e is a schematic view showing a state in which the springs surround the cylinders, and fig. 9f is a sectional view taken along line a-a of fig. 9 e.

Fig. 10 is a front view of the cylinder of the lotion pump of fig. 1.

Figures 11a and 11b illustrate a mouthpiece of the lotion pump of figure 1, wherein figure 11a is a front view of the mouthpiece and figure 11b is a top view of the mouthpiece.

Fig. 12a and 12b show sectional views of a lotion pump according to a second embodiment of the present invention, in which fig. 12a shows a locked state of the lotion pump, and fig. 12b shows a standby state of the lotion pump.

Figures 13a to 13d show the bearing block of the emulsion pump of figures 12a and 12b, in which figure 13a is a top view of the bearing block, figure 13b is a cross-sectional view of the bearing block, figure 13c is another cross-sectional view of the bearing block, and figure 13d is a perspective view of the bearing block.

Fig. 14a and 14b show the piston rod of the lotion pump of fig. 12a and 12b, wherein fig. 14a is a front view of the piston rod and fig. 14b is a perspective view of the piston rod.

Fig. 15a and 15b show perspective views of the interaction of the bearing seat and the piston rod, wherein in fig. 15a the bearing seat is in a first position relative to the piston rod, and in fig. 15b the bearing seat is in a second position.

Fig. 16a and 16b show sectional views of a lotion pump according to a third embodiment of the present invention, in which fig. 16a shows a locked state of the lotion pump, and fig. 16b shows a standby state of the lotion pump.

Fig. 17 is a partially enlarged view of a portion a in fig. 16 b.

Fig. 18a shows a cross-sectional view of a lotion pump according to a fourth embodiment of the present invention.

Fig. 18b shows a perspective view of the lotion pump of fig. 18 a.

Fig. 19a and 19b show sectional views of a lotion pump according to a fifth embodiment of the present invention, in which fig. 19a shows a locked state of the lotion pump and fig. 19b shows a standby state of the lotion pump.

Fig. 20 shows a side view of the head of the emulsion pump of fig. 19a and 19 b.

Fig. 21 shows a cross-sectional view of the piston rod of the lotion pump of fig. 19a and 19 b.

Fig. 22 shows a cross-sectional view of the piston of the lotion pump of fig. 19a and 19 b.

Fig. 23 shows a cross-sectional view of the piston rod of fig. 21 assembled with the piston of fig. 22.

Fig. 24 is a sectional view showing a piston rod in the lotion pump of a deformed configuration.

Fig. 25a shows a top view of the sleeve in the lotion pump of this deformed structure.

Fig. 25b shows a cross-sectional view of the cannula of fig. 25 a.

Fig. 26 shows a sectional view of a piston in the lotion pump of this deformed structure.

FIG. 27 shows a cross-sectional view of the piston rod, sleeve and piston assembly of FIGS. 24-26.

Fig. 28a and 28b show sectional views of a lotion pump according to a sixth embodiment of the present invention, in which fig. 28a shows a locked state of the lotion pump, and fig. 28b shows a standby state of the lotion pump.

FIG. 29 shows a cross-sectional view of a prior art lotion pump.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It is to be understood that the preferred embodiments of the present invention are shown in the drawings only, and are not to be considered limiting of the scope of the invention. Obvious modifications, variations and equivalents will occur to those skilled in the art based on the embodiments illustrated in the drawings, and features described in the following description of the various embodiments may be combined in any combination, unless otherwise indicated or clearly contradicted by context. All falling within the scope of protection of the present invention.

< first embodiment >

Fig. 1 to 11b show a lotion pump 100 according to a first embodiment of the present invention, wherein a release mechanism is provided in the lotion pump 100. Wherein fig. 1 shows a side view of the lotion pump 100, and fig. 2 shows a partially cut-away perspective view of the lotion pump 100, from which the internal structure of the lotion pump 100 can be seen.

Emulsion pump 100 includes a ram 110, a mouthpiece 120, and a cylinder 130. The cylinder 130 is connected to the mouthpiece 120, and an elastic return mechanism such as a spring 140 is provided outside the cylinder 130 around the outer circumference of the cylinder 130. Further, as shown in fig. 2, the lotion pump 100 further includes a piston rod 150, one end of the piston rod 150 is connected to the pressing head 110, and the other end thereof is connected to a piston and extends into the cylinder 130. The lotion pump 100 of the present invention further includes a bearing 160, and the bearing 160 is disposed around the piston rod 150 in the cylinder 130, so that the upper end of the spring 140 is supported by the bearing 160, and the lower end is supported by the cylinder 130, specifically, the lower portion of the cylinder 130.

It can be seen that in the lotion pump 100 of the first embodiment, the pressing head 110 can drive the piston rod 150 to move together with the piston on the piston rod 150 relative to the cylinder 130, the mouthpiece 120, etc., while the cylinder 130, the mouthpiece 120, etc., when mounted on a container, always remain fixed or stationary relative to the container. Therefore, in the lotion pump 100, the ram 110, the piston rod 150 and the piston on the piston rod 150 can be considered to form at least a part of the movable portion of the lotion pump 100, and correspondingly, the cylinder 130 and the mouthpiece 120 form at least a part of the fixed portion of the lotion pump 100.

The connection relationship between the related components playing a relaxing role in the lotion pump 100 of the present invention is shown in fig. 3. Fig. 4 and 5 show cross-sectional views of the lotion pump 100 in an unused state and an open state, respectively.

The detailed structure of each component of the lotion pump 100 of the first embodiment will be described separately, and on the basis of the detailed structure, the mutual connection and action relationship between the components will be described with reference to fig. 3 to 5, so as to clearly describe the structure and action principle of the lotion pump 100 of the first embodiment.

Bearing seat and piston rod：

In the present invention, the function of the release mechanism is achieved by the interaction between the piston rod 150 and the bearing seat 160. The details are as follows.

Fig. 6a to 6d show various views of the bearing housing 160 of the lotion pump 100 of the first embodiment, wherein fig. 6a and 6b are sectional views of the bearing housing 160 taken from different directions, fig. 6c is a plan view of the bearing housing 160, and fig. 6d is a perspective view of the bearing housing 160.

As can be seen, the bearing block 160 is generally annular in shape and is disposed around the piston rod 150 outside the piston rod 150, or around the piston rod 150 (see fig. 2). At least one, and preferably a pair of oppositely disposed guide blocks 161 are provided on the outside of the bearing block 160, which guide blocks 161 cooperate with notches 131 in the cylinder 130 to limit the movement of the bearing block 160, as will be described in more detail below.

At least one helical groove 162 is provided inside the annular body of the bearing block 160. In the preferred embodiment shown in fig. 6 a-6 d, the support base 160 includes two oppositely disposed helical grooves 162. Correspondingly, as shown in fig. 7a and 7b, at least one helical rib 151 capable of matching with the helical groove 162, for example, a pair of helical ribs 151 shown in fig. 7a and 7b, is provided on the outer circumferential surface of the piston rod 150. Preferably, an annular flange 153 is further disposed above the spiral rib 151, and when the supporting seat 160 is at the position of the highest point of the travel, the annular flange 153 acts as a stop for the supporting seat 160, so as to prevent the supporting seat 160 from moving upwards to disengage the spiral groove 162 from the spiral rib 151.

The piston rod 150 is also provided with a lock block 152 that cooperates with a notch 121 formed on the mouthpiece 120, specifically on the top of the mouthpiece 120, to allow the ram 110 to be switched between a locked state and a standby state, as described in more detail below.

Fig. 8 a-8 c show schematic perspective views of the cooperation between the piston rod 150 and the bearing seat 160. Specifically, when the ram 110 is rotated to rotate the piston rod 150 connected thereto, the bearing seat 160 can move downward relative to the piston rod 150 under the interaction between the spiral groove 162 and the spiral protrusion 151, as shown in fig. 8 b. Further rotation of the piston rod 150 causes the spiral protrusion 151 of the piston rod 150 to come out of the spiral groove 162 of the holder 160, and the lower end surface of the spiral protrusion 151 to abut against the upper surface of the holder 160, as shown in fig. 8 c. In this manner, the spring 140 may be moved from a non-standby state to a compressed standby state.

Spring：

Fig. 9a to 9d show various views of the spring 140, wherein fig. 9a shows a front view of the spring 140, fig. 9b shows a perspective view of the spring 140, fig. 9c shows a top view of the spring 140, and fig. 9d shows a bottom view of the spring 140.

As shown in fig. 9a to 9c, the spring 140 has an upper spring seat 141 having a ring shape and a lower spring seat 142 having a ring shape, and both ends of at least one elastic strip 143 are respectively connected to the upper spring seat 141 and the lower spring seat 142. The spring 140 shown in the figures includes two elastic strips 143, but it will be appreciated by those skilled in the art that any suitable number of elastic strips 143 may be provided as desired, such as one elastic strip 143 or three or more elastic strips 143.

At the end of the elastic strip 143 connected to the upper spring seat 141 and/or the lower spring seat 142, a pivot 146 may be preferably provided. The pivot portion 146 has a sheet shape, and when the spring 140 is compressed, the sheet-shaped pivot portion 146 can pivot to be folded onto the upper spring seat 141/the lower spring seat 142.

Preferably, as shown in fig. 9c, at least one guide groove 144 is formed at the inner side of the upper spring seat 141 of the spring 140, which cooperates with a spring guide bar 132 (see fig. 10) formed on the outer circumferential surface of the cylinder 130 to guide the movement of the spring 140, as will be described in detail hereinafter.

As shown in fig. 9d, a guide groove 145 may also be formed at the inner side of the lower spring seat 142 of the spring 140 to facilitate the engagement of the corresponding spring guide bar 132 of the cylinder 130.

It is also preferable that the shape of the elastic strip 143 is such that a projection of the elastic strip in the axial direction of the lotion pump 100 is substantially arc-shaped. In other words, the elastic strip 143 extends around at least a portion of the outer circumference of the cylinder when viewed in the axial direction of the lotion pump 100, as shown in fig. 9e and 9 f. In this way, the structure of the lotion pump 100, particularly the portion below the mouthpiece 120 including the spring 140, can be made more compact.

Of course, fig. 9 a-9 f illustrate a preferred configuration of the spring 140. The structure may be modified or some of the structural parts may be omitted. For example, the

guide grooves

144 and 145 provided in the upper and

lower spring seats

141 and 142, respectively, may be omitted. Further, the spring 140 may not include the upper spring seat 141 and the lower spring seat 142, and the elastic bars 143 are fixed to the supporting seat 160 and the lower portion of the cylinder 130, respectively.

Cylinder：

Fig. 10 shows a front view of the cylinder 130. As shown in fig. 10, a slot 131 is formed on an outer wall of the cylinder 130, and the guide block 161 of the bearing block 160 is slidably received in the slot 131, so that the bearing block 160 can only move longitudinally with respect to the cylinder 130, but cannot rotate.

Preferably, a spring guide bar 132 is further provided on the outer circumference of the cylinder 130, which cooperates with a guide groove 144 in the upper spring seat 141 and/or a guide groove 145 in the lower spring seat 142 of the spring 140 to function as a guide for the spring 140.

The arrangement of the guide groove and the guide bar may be interchanged, that is, the guide bar is formed on the upper spring seat 141/the lower spring seat 142, and the guide groove is formed on the cylinder 130.

Also, preferably, a reverse-buckling portion 133 is formed at the bottom of the outer wall of the cylinder 130, and cooperates with the lower spring seat 142 of the spring 140 to fix the lower spring seat 142 against upward movement of the lower spring seat 142 relative to the cylinder 130.

Tooth socket：

Figures 11a and 11b show front and top views, respectively, of mouthpiece 120. As shown, a notch 121 is formed in the mouthpiece 120, particularly at the top of the mouthpiece 120. When the piston rod 150 is rotated to align the locking block 152 with the gap 121, the locking block 152 can pass through the gap 121, so that the piston rod 150 and the pressure head 110 connected thereto are sprung upward, and the lotion pump 100 is put into a standby state.

Operation of emulsion pump：

The operation of the lotion pump 100 of the first embodiment will now be described with reference to fig. 4 and 5.

As shown in fig. 4, the lotion pump 100 is in a locked state, which may be used for shipping, marketing, etc. of the lotion pump 100. At this time, the supporting seat 160 in the lotion pump 100 is located at the highest point of the stroke, and the spiral groove 162 of the supporting seat 160 is engaged with the spiral protrusion 151 in the piston rod 150. When the lotion pump 100 is to be operated to use a product after the product is purchased, a user rotates the head 110 in an opening direction to rotate the piston rod 150 connected to the head 110.

During rotation of the piston rod 150, the helical rib 151 on the outer surface of the piston rod 150 interacts with the helical groove 162 on the bearing seat 160, causing the bearing seat 160 to move downward relative to the piston rod 150, i.e., in a direction toward the spring 140, until the helical rib 151 disengages the helical groove 162. In this process, the bearing block 160 applies a compressive force to the spring 140, and the compressive force gradually increases. After the helical ribs 151 disengage from the helical grooves 162, the piston rod 150 continues to rotate, biasing the helical grooves 162 and the helical ribs 151 apart, such that the lower ends of the helical ribs 151 abut against the upper surfaces of the helical grooves 162. At this time, the spring 140 enters the standby state from the free non-standby state.

The lock cylinder block 152 may also be moved into alignment with the notch 121 at the top of the mouthpiece 120 as the piston rod 150 is rotated. At this time, the lock block 152 may pass through the notch 121, thereby allowing the ram 110 to be sprung up to a standby state.

After use, if it is desired to return the lotion pump 100 to the locked condition, the ram 110 is depressed to the lowest point of its travel, and the ram 110 is then rotated in a closing direction opposite the opening direction. In the process, the spiral rib 151 of the piston rod 150 is re-engaged in the spiral groove 162 of the supporting seat 160, and as the piston rod 150 rotates, the spiral rib 151 and the spiral groove 162 interact with each other, so that the supporting seat 160 moves upward, i.e. in a direction away from the spring 140, the compression force applied to the spring 140 is reduced, and the spring 140 returns to the non-standby state. Even further, the abutment 160 can be disengaged from contact with the spring 140. Here, it can be seen that the spiral protrusion 151 can switch the spring 140 between the non-standby state and the standby state, i.e., function as a switching mechanism. The spiral protrusion 151 may also function to engage and disengage the spring 140 with and from the movable portion of the lotion pump 100 via the support base 160.

Preferably, the relative positions and dimensions of the helical rib 151 and the locking block 152 in the piston rod 150 are such that the helical rib 151 disengages from the helical groove 162 before the locking block 152 is aligned with the notch 121 of the mouthpiece 120. In this way, the helical ribs 151 are prevented from entering the helical grooves 162 again during the process of pressing the ram 110 to pump the product.

In addition, the longitudinal length of the lock block 152 is preferably configured such that the lock block 152 always moves in the notch 121 during the process of pressing the ram 110 to pump the product and the ram 110 rebounds, thereby preventing the spiral protrusion 151 from entering the spiral groove 162 again due to the rotation of the ram 110 during use.

It is specifically noted that although in the above-described configuration, the helical rib 151 functioning as the switching mechanism is formed on the piston rod, the switching mechanism may be formed on any other part of the movable portion of the lotion pump 100 and in other locations, which is also within the scope of the present disclosure.

Further, the switching mechanism may be formed on a fixed portion of the lotion pump 100, for example, a spiral protrusion may be formed on an inner wall of the cylinder 130, and correspondingly, a spiral groove may be formed on an outer circumference of the supporting base 160. Alternatively, in some constructions of the lotion pump, the piston rod formed with the spiral ribs is a fixed portion of the lotion pump, and the cylinder is a movable portion (this case will be explained in detail in the following embodiments). Nor do they depart from the scope of the present disclosure.

< second embodiment >

Fig. 12 a-15 b show a lotion pump 200 according to a second embodiment of the present invention. The same or similar features as those of the emulsion pump 100 of the first embodiment will not be described in detail, and only the features of the emulsion pump 200 of the second embodiment that are not disclosed in the first embodiment will be described. Features disclosed in the first embodiment are equally applicable to the second embodiment, unless expressly stated to the contrary or otherwise structurally contradicted by context.

Fig. 12a and 12b show the lotion pump 200 in a locked state and the lotion pump 200 in a ready-to-use state, respectively. The emulsion pump 200 includes a ram 210, a mouthpiece 220, a cylinder 230, a spring 240, and a piston rod 250. A bearing block 260 is provided in the cylinder 230. As in the first embodiment, a notch 231 is formed in an outer wall of the cylinder 230, and a guide block 261 of the bearing block 260 is slidably received in the notch 231 so that the bearing block 260 can move only in the longitudinal direction with respect to the piston rod 250.

Fig. 13a to 13d show various views of the bearing block 260 in the emulsion pump 200 of the second embodiment, wherein fig. 13a shows a top view of the bearing block 260, fig. 13b shows a cross-sectional view of the bearing block 260, fig. 13c shows another cross-sectional view of the bearing block 260, and fig. 13d shows a perspective view of the bearing block 260.

The supporting base 260 of the emulsion pump 200 of the second embodiment is also substantially annular, and has at least one guide block 261 (two guide blocks 261 are shown as being oppositely disposed). At least one, and preferably a pair of opposed bearing notches 262 are formed in the inner side of the bearing 260. At least one support seat stopper 263 is also preferably formed at the inner side of the support seat 260, and the support seat stopper 263 is preferably formed at the upper and lower portions of the inner side of the support seat 260, respectively.

Fig. 14a and 14b show a front view and a perspective view, respectively, of the piston rod 250. The guide bar 251 is formed on the outer circumference of the piston rod 250 corresponding to the bearing notch 262 provided in the bearing 260. Further, an upper locking block 252 and a lower locking block 253 are preferably formed on the outer circumference of the piston rod 250 at the upper and lower sides of the guide bar 251, respectively. The upper and lower locking blocks 252 and 253 cooperate with the bearing block 263 such that the piston rod 250 can only rotate in a predetermined direction.

The piston rod 250 and the bearing block 260 cooperate as shown in fig. 15a and 15 b.

The operation of the lotion pump 200 of the second embodiment will now be described with reference to fig. 12a, 12b, 15a and 15 b.

As shown in fig. 12a and 15a, when the lotion pump 200 is in the locked state, the bearing block 260 is positioned above the guide bar 251 of the piston rod 250, and the bearing block notch 262 is offset from the guide bar 251, thereby fixing the position of the bearing block 260 relative to the piston rod 250.

When the lotion pump 200 is to be used, the ram 210 is rotated in the opening direction to align the bearing notches 262 with the guide strips 251, whereupon the ram 210 can be manually pulled up to the highest point of its stroke and the bearing 260 moved relative to the piston rod 250 below the guide strips 251. The ram 210 is then rotated further to again misalign the bearing notches 262 with the guide bars 251 so that the guide bars 251 restrain the bearing 260 in position therebelow. At this point, the spring 240 is loaded so that a pumping action can be performed by depressing the ram 210.

After use, to return the emulsion pump 200 to the locked position, the ram 210 may be rotated in the opposite direction to realign the bearing notches 262 with the guide bars 251, the ram 210 may then be manually depressed to the lowest point of its travel, and the ram 210 may then be rotated further to misalign the bearing notches 262 with the guide bars 251 to retain the bearing 260 in its upper position by the guide bars 251.

Preferably, in the case where the upper and lower locking blocks 252 and 253 are provided on the piston rod 250 and the bearing block 263 is provided in the bearing 260, the interaction between the upper and lower locking blocks 252 and 253 and the bearing block 263 allows the user to rotate the ram 210 only in a predetermined direction.

< third embodiment >

Fig. 16a to 17 show a lotion pump 300 according to a third embodiment of the present invention. The same or similar features as those of the first and second embodiments will not be described in detail, and only those features of the emulsion pump 300 of the third embodiment that are not disclosed in the first and second embodiments will be described. Features disclosed in the first and second embodiments are equally applicable to the third embodiment, unless expressly stated to the contrary or otherwise structurally contradicted.

The lotion pump 300 comprises a pressure head 310, a tooth socket 320, a cylinder 330, a spring 340 and a piston rod 350, and the lotion pump 300 also comprises a supporting seat 360. In the lotion pump 300 of the third embodiment, a reverse ring 351 is formed on a piston rod 350, the reverse ring 351 is formed with a first inclined surface 352 facing upward, and correspondingly, a second inclined surface 361 facing downward is formed on a bearing seat 360.

In the locked position shown in fig. 16a, the ram 310 is at its lowest point of travel and the bearing block 360 is above the inverted ring 351. After rotating the ram 310 to the open position, the ram 310 is pulled up to the highest point of its travel, during which the reversing ring 351 passes up over the bearing block 360 to above the bearing block 360. At this time, the structure of the reverse ring 351 prevents the support base 360 from returning to above the reverse ring 351 again. Thus, the lotion pump 300 is maintained in the stand-by state shown in fig. 16 b.

< fourth embodiment >

Fig. 18a and 18b show a lotion pump 400 according to a fourth embodiment of the present invention. The same or similar features as those of the first to third embodiments will not be described in detail, and only those features of the emulsion pump 400 of the fourth embodiment that are not disclosed in the first to third embodiments will be described. Features disclosed in the first to third embodiments are equally applicable to the fourth embodiment unless expressly stated to the contrary or otherwise structurally contradicted.

The lotion pump 400 of the fourth embodiment is substantially the same as the lotion pump 100 of the first embodiment except that the upper and

lower spring seats

141 and 142 of the spring 140 are omitted. In other words, in the lotion pump 400, the upper end of the elastic strip of the spring 440 is directly connected to the supporting seat 460, and the lower end of the elastic strip is directly connected to the lower portion of the cylinder 430.

< fifth embodiment >

Fig. 19a to 22 show a lotion pump 500 of a fifth embodiment of the present application. The same or similar features as those of the first to fourth embodiments will not be described in detail, and only those features of the emulsion pump 500 of the fifth embodiment that are not disclosed in the first to fourth embodiments will be described. The technical features disclosed in the first to fourth embodiments are also applicable to the fifth embodiment unless there is a contrary expression or a structural conflict.

Fig. 19a shows a sectional view of the lotion pump 500 in a lower locked state, and fig. 19b shows a sectional view of the lotion pump 500 in a standby state. As can be seen from fig. 19a and 19b, in the fifth embodiment, the lower portion of the ram 510 of the lotion pump 500 is provided with external threads and is fixed in a locked position by a threaded connection with the socket 520. The external threads 511 on the ram 510 are more clearly shown in figure 20. Accordingly, an internal thread matching the external thread 511 is formed in the opening of the mouthpiece 520.

Further, as shown in fig. 21 to 23, the piston rod 550 of the lotion pump 500 of the fifth embodiment is formed separately from the piston 580 and is connected thereto. A spiral rib as a switching member may be formed on an outer surface of either one of the piston rod 550 and the piston 580, or a part thereof may be formed on an outer surface of the piston rod 550 and another part thereof may be formed on an outer surface of the piston 580. In the structure shown in the drawing, a spiral protrusion 581 is formed on an outer surface of the piston 580.

Of course, the structure of the reverse snap ring and the inclined surface in the third embodiment can also be applied to the case where the piston rod and the piston are formed separately as shown in fig. 21 to 23.

Fig. 24 to 27 show a modification of a part of the structure in the fifth embodiment. Wherein the piston rod 650 and the piston 680 are also separately formed and then coupled together. Unlike the structures shown in fig. 21 to 23, the structure shown in fig. 24 to 27 is provided with a sleeve 670, and a spiral protrusion 671 or other type of switching member is formed on the outer surface of the sleeve 670. And, the sleeve 670 is fitted over the outer surfaces of the piston rod 650 and the piston 680 which are coupled together, as shown in fig. 27. Structures such as protrusions 672 may also preferably be formed on the inner surface of sleeve 670 to facilitate a tight fit between piston rod 650 and/or the outer surface of piston 680.

< sixth embodiment >

Fig. 28a and 28b show a lotion pump 700 according to a sixth embodiment of the present application. The same or similar technical features as those of the first to fifth embodiments and their modifications will not be described in detail, but only the technical features specific to the emulsion pump 700 of the sixth embodiment will be described. Moreover, the technical features disclosed in the first to fifth embodiments and variations thereof are equally applicable to the fifth embodiment, unless otherwise indicated to the contrary or otherwise structurally contradicted.

Fig. 28a shows a sectional view of the lotion pump 700 in a lower cylinder state, and fig. 28b shows a sectional view of the lotion pump 700 in a standby state. It can be seen that the lotion pump 700 includes a head 710, and a cylinder 730 is connected to a lower portion of the head 710. Thus, in the sixth embodiment, the movement (e.g., rotation or up-and-down movement) of the ram 710 moves the cylinder 730 together, so that the ram 710 and the cylinder 730 constitute at least a part of a movable portion of the lotion pump.

In addition, in the lotion pump 700 of the sixth embodiment, a spring bracket 770 is connected to the mouthpiece 720, one end (specifically, the lower end in fig. 28a and 28 b) of the spring 750 is supported by the spring bracket 770, and the other end (the upper end in the drawings) of the spring 750 is supported by the spring bearing 760.

A piston rod 740 is also fixedly connected to the spring support 770, and a piston at one end of the piston rod 740 extends into the cylinder 730.

As shown in fig. 28a and 28b, a first protrusion 731 and a second protrusion 732 are formed on an outer wall of the cylinder 730, and a groove 761 is formed on an inner surface of the spring support 760. As the ram 710 and the cylinder 730 move up and down, the grooves 761 may be respectively engaged with one of the first and

second protrusions

731 and 732. For example, when groove 761 is mated with upper projection 731 (as in the state of fig. 28 a), spring 750 is in an unloaded state, and when groove 761 is mated with lower second projection 732, or even under second projection 732, spring 750 enters a loaded state.

Therefore, in the sixth embodiment, what functions as a switching mechanism is the first and

second protrusions

731 and 732 formed on the outer wall of the cylinder 730. Of course, the spiral ribs, guide bars, and other structures mentioned in the above embodiments can also be applied to the sixth embodiment.

Claims

1. The utility model provides an emulsion pump, emulsion pump includes movable part and fixed part, wherein, the movable part includes pressure head, piston rod and piston, wherein the piston rod is connected the lower part of pressure head, just be provided with on the piston rod the piston, the fixed part includes facing and cylinder, wherein the cylinder with the facing is connected, just be provided with at least in the piston rod the part of piston extends to inside the cylinder, its characterized in that, emulsion pump still includes:

and one end of the elastic resetting mechanism is in contact with or connected with the movable part, and the other end of the elastic resetting mechanism is fixed on the fixed part, wherein the elastic resetting mechanism comprises at least one elastic strip which is shaped to extend around at least one part of the periphery of the cylinder when viewed along the axial direction of the emulsion pump.

2. The emulsion pump of claim 1, wherein the resilient return mechanism further comprises:

an annular spring upper seat, the upper end of the elastic strip is connected to the spring upper seat, and/or

The lower end of the elastic strip is connected to the lower spring seat.

3. Emulsion pump according to claim 2, characterized in that the elastic strip is connected to the upper spring seat and/or the lower spring seat by a pivot, wherein the pivot pivots and folds when the elastic return means are compressed.

4. The lotion pump of claim 2 wherein a first guide groove is formed in one of the inner side of said spring upper seat and said cylinder, and a first guide bar is formed in the other of the inner side of said spring upper seat and said cylinder, said first guide groove and said first guide bar cooperating; and/or

A second guide groove is formed on one of the inner side of the lower spring seat and the cylinder, and a second guide bar is formed on the other of the inner side of the lower spring seat and the cylinder, and the second guide groove and the second guide bar are matched.

5. An emulsion pump as claimed in any one of claims 2 to 4, wherein a lower portion of the cylinder is provided with a reverse-buckling portion which fixes the under-spring seat of the resilient return mechanism.

6. The lotion pump of any one of claims 1-4, further comprising a switching mechanism configured to cooperate with the resilient return mechanism such that when the ram is rotated in a first direction and/or moved upwardly, the one end of the resilient return mechanism moves in a direction toward the other end of the resilient return mechanism to a first position, thereby compressing the resilient return mechanism and causing the resilient return mechanism to enter a standby state, and when the ram is rotated in a second direction opposite the first direction and/or moved downwardly, the one end of the resilient return mechanism moves in a direction away from the other end of the resilient return mechanism to a second position, thereby causing the resilient return mechanism to enter a non-standby state.