Lotion pump

Abstract

A lotion pump includes an elastic return mechanism. The elastic return mechanism comprises at least one elastic strip. The elastic strip is configured to extend around at least a portion of the outer circumference of a cylinder of the lotion pump when viewed along the axial direction of the lotion pump. This makes the lotion pump compact, facilitating product transportation and storage.

Description

Technical Field

[0001] The present invention relates to a lotion pump, in particular to an all-plastic lotion pump. Background Art

[0002] Lotion pumps are widely used in daily necessities such as hand soap and shower gel to pump products from containers such as bottles for use. Most lotion pumps currently on the market are equipped with a metal spring. After the user presses the pump to pump a certain amount of product from the container for use, the metal spring resets the pump for the next use.

[0003] In recent years, with the increasing demand for environmental protection, lotion pumps are required to be recycled to achieve the recyclable utilization of resources. In order to facilitate the recycling and reuse of lotion pumps, the use of plastic springs instead of metal springs has been proposed in the field of lotion pump manufacturing, that is, all-plastic lotion pumps. Common forms of plastic springs include plastic threaded springs, plastic bow springs, bellows springs, etc. However, there are some problems with plastic springs. For example, when the plastic spring is compressed for a long time, it will yield and deform, causing the elastic force of the plastic spring to decay until it can no longer function as a spring. In order to prevent the plastic spring from failing due to long-term compression, one solution is to set the all-plastic lotion pump to an upper lock type, and to allow the plastic spring to be in a free and relaxed state without compression when the lotion pump is not in use.

[0004] Figure 29 An exemplary lotion pump with a plastic spring is shown in FIG. The lotion pump 1 comprises a pressure head 10, a toothed sleeve 20, a cylinder 30, and a piston rod 40. One end of a spring 50 is connected to the piston 40, and the other end is connected to the cylinder 30. When the pressure head 10 is pressed, the piston rod 40 moves downward, compressing the spring 50. When the pressure applied to the pressure head 10 is removed, the elastic force of the spring 50 causes the pressure head 10 to return to its original position. Figure 29 The lotion pump 1 shown in the figure is a top-lock type lotion pump. When not in use, such as during product transportation or display and sale, the pressure head 10 is at the highest point of its stroke, so that the spring 50 is in a state of low compression force. In this way, the spring 50 will not yield and fail due to compression when not in use.

[0005] As you can see, the lotion pump is a top-lock type. Top-lock lotion pumps sometimes struggle to meet the packaging requirements of e-commerce shipping. Furthermore, top-lock lotion pumps are relatively tall when initially unused, placing higher requirements on carton and shelf heights.

[0006] Therefore, in the field of lotion pumps, there is still a need for a lotion pump with a plastic spring having a further improved structure, which can meet the needs of e-commerce transportation and further solve the problem of elastic force attenuation of the plastic spring. Summary of the Invention

[0007] This invention addresses the aforementioned issues with existing lotion pumps. It aims to provide an improved, compact lotion pump. Furthermore, the pump features a lower locking mechanism, thereby meeting the needs of e-commerce delivery.

[0008] The lotion pump of the present invention includes a movable part and a fixed part, wherein the movable part includes a pressure head, a piston rod, and a piston, wherein the piston rod is connected to the lower part of the pressure head and is provided with the piston, and the fixed part includes a socket and a cylinder, wherein the cylinder is connected to the socket, and at least the portion of the piston rod provided with the piston extends into the interior of the cylinder. The lotion pump further includes: an elastic reset mechanism, one end of the elastic reset mechanism is in contact with or connected to the movable part, and the other end of the elastic reset mechanism is fixed to the fixed part, wherein the elastic reset mechanism includes at least one elastic strip, and the shape of the elastic strip is configured so that when viewed along the axial direction of the lotion pump, the elastic strip extends around at least a portion of the outer circumference of the cylinder.

[0009] With the above structure, the structure of the lotion pump of the present invention, especially the structure of the portion below the mouthpiece including the spring, is more compact, thereby further facilitating the transportation and storage of the product.

[0010] Preferably, the elastic reset mechanism further comprises: an annular spring upper seat, the upper end of the elastic strip is connected to the spring upper seat, and / or an annular spring lower seat, the lower end of the elastic strip is connected to the spring lower seat.

[0011] Preferably, the elastic strip is connected to the spring upper seat and / or the spring lower seat via a pivot portion, wherein the pivot portion pivots and folds when the elastic return device is compressed.

[0012] Preferably, a first guide groove is formed on the inner side of the spring upper seat and one of the cylinders, a first guide strip is formed on the inner side of the spring upper seat and the other of the cylinders, and the first guide groove and the first guide strip cooperate with each other; and / or a second guide groove is formed on the inner side of the spring lower seat and one of the cylinders, a second guide strip is formed on the inner side of the spring lower seat and the other of the cylinders, and the second guide groove and the second guide strip cooperate with each other.

[0013] In a further preferred structure, an undercut portion is provided at the lower portion of the cylinder, and the undercut portion fixes the spring lower seat of the elastic reset mechanism.

[0014] Furthermore, the lotion pump of the present invention may also include a switching mechanism, which is configured to cooperate with the elastic reset mechanism so that when the pressure head is rotated in a first direction and / or moved upward, one end of the elastic reset mechanism moves to a first position in a direction toward the other end of the elastic reset mechanism, thereby compressing the elastic reset mechanism and causing the elastic reset mechanism to enter a standby state; and when the pressure head is rotated in a second direction opposite to the first direction and / or moved downward, one end of the elastic reset mechanism moves to a second position in a direction away from the other end of the elastic reset mechanism, causing the elastic reset mechanism to enter a non-standby state.

[0015] By setting up the switching mechanism, the elastic reset mechanism can switch between an applicable state and an inapplicable state, and in the inapplicable state, the elastic reset mechanism can be subjected to little or no pressure. This structure is particularly advantageous for plastic springs and can extend their service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In the attached figure:

[0017] Figure 1 FIG. 1 is a side view of a lotion pump according to a first embodiment of the present invention.

[0018] Figure 2 yes Figure 1 The partial cutaway view of the lotion pump shows the internal structure of the lotion pump.

[0019] Figure 3 yes Figure 1 A partial perspective view of the lotion pump shown, including the piston rod, spring and support seat of the lotion pump.

[0020] Figure 4 Shown Figure 1 A cross-sectional view of the lotion pump is shown, wherein the lotion pump is in a locked state.

[0021] Figure 5 Shown Figure 1 Another cross-sectional view of the lotion pump is shown, wherein the lotion pump is in a standby state.

[0022] Figures 6a to 6d Shown Figure 1 The support base of the lotion pump shown in FIG. Figure 6a is a cross-sectional view of the support seat. Figure 6b is another cross-sectional view of the support seat, Figure 6c is a top view of the support seat, and Figure 6d It is a three-dimensional diagram of the support seat.

[0023] Figure 7a and 7b Shown Figure 1 The piston rod of the lotion pump shown in FIG. Figure 7a is a side view of the piston rod 150, Figure 7b This is a front view of the piston rod.

[0024] Figures 8a to 8c A perspective view of the interaction between the bearing seat and the piston rod is shown, wherein Figure 8a In the embodiment, the support seat is in a first position relative to the piston rod. Figure 8b In the embodiment, the support seat moves toward the second position relative to the piston rod, and Figure 8c In the process, the support seat reaches the second position.

[0025] Figures 9a to 9f Shown Figure 1 The spring of the lotion pump shown, wherein Figure 9a is the front view of the spring, Figure 9b is a three-dimensional diagram of a spring. Figure 9c is a top view of the spring, Figure 9d This is a bottom view of the spring. Figure 9e A schematic diagram showing the state of the spring surrounding the cylinder is shown, and Figure 9f It shows that along Figure 9e The cross-sectional view is obtained along the line AA.

[0026] Figure 10 yes Figure 1 A front view of the cylinder of the lotion pump is shown.

[0027] Figure 11a and 11b Shown Figure 1 The tooth sleeve of the lotion pump shown, wherein Figure 11a This is the front view of the braces. Figure 11b This is a top view of the braces.

[0028] Figure 12a and 12b A cross-sectional view of a lotion pump according to a second embodiment of the present invention is shown, wherein Figure 12a Shows the locked state of the lotion pump. Figure 12b The lotion pump is shown in a standby state.

[0029] Figures 13a to 13d Shown Figure 12a and 12b The support base of the lotion pump shown, wherein Figure 13a This is a top view of the support seat. Figure 13b is a cross-sectional view of the support seat. Figure 13c is another cross-sectional view of the support seat, and Figure 13d It is a three-dimensional diagram of the support seat.

[0030] Figure 14a and 14b Shown Figure 12a and 12b The piston rod of the lotion pump shown in FIG. Figure 14aThis is the front view of the piston rod. Figure 14b It is a three-dimensional diagram of the piston rod.

[0031] Figure 15a and 15b A perspective view of the interaction between the bearing seat and the piston rod is shown, wherein Figure 15a In the embodiment, the support seat is in a first position relative to the piston rod, and in Figure 15b In the embodiment of the present invention, the support seat is in the second position.

[0032] Figure 16a and 16b A cross-sectional view of a lotion pump according to a third embodiment of the present invention is shown, wherein Figure 16a Shows the locked state of the lotion pump. Figure 16b The lotion pump is shown in a standby state.

[0033] Figure 17 yes Figure 16b A partial enlarged view of part A in FIG.

[0034] Figure 18a A cross-sectional view showing a lotion pump according to a fourth embodiment of the present invention.

[0035] Figure 18b Shown Figure 18a A perspective view of the lotion pump shown.

[0036] Figure 19a and 19b A cross-sectional view of a lotion pump according to a fifth embodiment of the present invention is shown, wherein Figure 19a Shows the locked state of the lotion pump. Figure 19b The lotion pump is shown in a standby state.

[0037] Figure 20 Shown Figure 19a and 19b Side view of the pressure head of the lotion pump.

[0038] Figure 21 Shown Figure 19a and 19b Cross-sectional view of the piston rod of a lotion pump.

[0039] Figure 22 Shown Figure 19a and 19b Cross-sectional view of the piston of a lotion pump.

[0040] Figure 23 Shown Figure 21 The piston rod and Figure 22 A cross-sectional view of the pistons assembled together.

[0041] Figure 24A cross-sectional view showing a piston rod in a lotion pump with a deformed structure.

[0042] Figure 25a A top view of the sleeve in the lotion pump is shown showing the deformed structure.

[0043] Figure 25b Shown Figure 25a Cross-sectional view of the casing in FIG.

[0044] Figure 26 A cross-sectional view of a piston in a lotion pump showing the modified structure.

[0045] Figure 27 Shown Figures 24-26 A cross-sectional view of the piston rod, sleeve, and piston assembled together.

[0046] Figure 28a and 28b A cross-sectional view of a lotion pump according to a sixth embodiment of the present invention is shown, wherein Figure 28a Shows the locked state of the lotion pump. Figure 28b The lotion pump is shown in a standby state.

[0047] Figure 29 A cross-sectional view of a prior art lotion pump is shown. DETAILED DESCRIPTION

[0048] The following detailed description of the specific embodiments of the present invention is provided in conjunction with the accompanying drawings. It should be understood that the drawings illustrate only preferred embodiments of the present invention and do not limit the scope of the present invention. Those skilled in the art may make various obvious modifications, variations, and equivalent substitutions to the present invention based on the embodiments shown in the drawings. Furthermore, unless otherwise indicated or clearly contradictory, the features of the different specific embodiments described below may be arbitrarily combined. All of these fall within the scope of protection of the present invention.

[0049] <First embodiment>

[0050] Figures 1 to 11b FIG. 1 shows a lotion pump 100 according to a first embodiment of the present invention, wherein the lotion pump 100 is provided with a relaxation mechanism. Figure 1 shows a side view of the lotion pump 100, Figure 2 A partially cutaway perspective view of the lotion pump 100 is shown, from which the internal structure of the lotion pump 100 can be seen.

[0051] The lotion pump 100 includes a pressure head 110, a toothed sleeve 120, and a cylinder 130. The cylinder 130 is connected to the toothed sleeve 120, and an elastic reset mechanism such as a spring 140 is provided around the outer periphery of the cylinder 130. Figure 2As shown, the lotion pump 100 further includes a piston rod 150. One end of the piston rod 150 is connected to the pressure head 110, and the other end is connected to a piston. The piston rod 150 extends into the interior of the cylinder 130. Furthermore, the lotion pump 100 of the present invention further includes a support seat 160. The support seat 160 is disposed within the cylinder 130 around the piston rod 150. Thus, the upper end of the spring 140 is supported by the support seat 160, while the lower end is supported by the cylinder 130, specifically, by the lower portion of the cylinder 130.

[0052] As can be seen, in the lotion pump 100 of the first embodiment, the ram 110 can drive the piston rod 150 and the piston on the piston rod 150 to move relative to the cylinder 130, the mouthpiece 120, and other components. However, when installed on a container, the cylinder 130, the mouthpiece 120, and other components always remain fixed or stationary relative to the container. Therefore, in this lotion pump 100, the ram 110, the piston rod 150, and the piston on the piston rod 150 can be considered to constitute at least a portion of the movable parts of the lotion pump 100, while the cylinder 130 and the mouthpiece 120 constitute at least a portion of the fixed parts of the lotion pump 100.

[0053] Figure 3 FIG. 2 shows the connection relationship between the related components that play a role in relaxing the lotion pump 100 of the present invention. Figure 4 and 5 sectional views of the lotion pump 100 in an unused state and an opened state are shown respectively.

[0054] The following will describe the specific structure of each component of the lotion pump 100 of the first embodiment, and then combine it with Figures 3-5 The interconnections and functional relationships among the various components are described below to clearly illustrate the structure and operating principle of the lotion pump 100 of the first embodiment.

[0055] Bearing seat and piston rod :

[0056] In the present invention, the function of the release mechanism is achieved through the interaction between the piston rod 150 and the support seat 160. The details are as follows.

[0057] Figures 6a to 6d Various views of the support base 160 of the lotion pump 100 of the first embodiment are shown, wherein Figure 6a and 6b are cross-sectional views of the support seat 160 obtained by cutting from different directions. Figure 6c is a top view of the support seat 160, and Figure 6d It is a three-dimensional view of the support base 160.

[0058] As can be seen from the figure, the shape of the support seat 160 is roughly annular, and it is arranged around the piston rod 150 on the outside of the piston rod 150, or in other words, it is sleeved on the outside of the piston rod 150 (see Figure 2 At least one, and preferably a pair of, opposing guide blocks 161 are provided on the outside of the support base 160. The guide blocks 161 cooperate with the notches 131 in the cylinder 130 to limit the movement of the support base 160, as will be described in more detail below.

[0059] At least one spiral groove 162 is provided on the inner side of the annular body of the support seat 160. Figures 6a to 6d In the preferred embodiment shown, the support seat 160 includes two oppositely disposed spiral grooves 162. Correspondingly, as shown in FIG. Figure 7a and 7b As shown, at least one spiral ridge 151 is provided on the outer circumference of the piston rod 150 and can match the spiral groove 162, for example Figure 7a and 7b Preferably, an annular flange 153 is further provided above the spiral ridge 151. When the support base 160 is at the highest point of its travel, the annular flange 153 acts as a stop for the support base 160, preventing the support base 160 from continuing to move upward and causing the spiral groove 162 to disengage from the spiral ridge 151.

[0060] The piston rod 150 is also provided with a locking block 152 which cooperates with a notch 121 formed on the toothed brace 120, specifically on the top of the toothed brace 120, to allow the ram 110 to be switched between a locked state and a standby state, as described in more detail below.

[0061] Figures 8a to 8c 1 shows a schematic three-dimensional diagram of the cooperation between the piston rod 150 and the support seat 160. Specifically, when the rotating pressure head 110 causes the piston rod 150 connected thereto to rotate, the support seat 160 can move downward relative to the piston rod 150 under the interaction between the spiral groove 162 and the spiral ridge 151, as shown in FIG. Figure 8b Furthermore, by further rotating the piston rod 150, the spiral rib 151 of the piston rod 150 can be disengaged from the spiral groove 162 of the support seat 160, and the lower end surface of the spiral rib 151 can be abutted against the upper surface of the support seat 160, as shown. Figure 8c Like this, spring 140 can be entered into the compressed standby state from the non-standby state.

[0062] spring :

[0063] Figures 9a to 9dVarious views of the spring 140 are shown, wherein Figure 9a Shown is a front view of the spring 140, Figure 9b shows a perspective view of the spring 140, Figure 9c 9d shows a top view of the spring 140, while 9d shows a bottom view of the spring 140.

[0064] like Figures 9a to 9c As shown, the spring 140 includes an annular upper spring seat 141 and an annular lower spring seat 142, and at least one elastic strip 143 has two ends connected to the upper spring seat 141 and the lower spring seat 142. The spring 140 shown in the figure includes two elastic strips 143, but those skilled in the art will appreciate that any suitable number of elastic strips 143 can be provided as needed, such as one elastic strip 143 or three or more elastic strips 143.

[0065] A pivot portion 146 is preferably provided at the end where the elastic strip 143 is connected to the spring upper seat 141 and / or the spring lower seat 142. The pivot portion 146 is sheet-shaped and can pivot and fold onto the spring upper seat 141 / spring lower seat 142 when the spring 140 is compressed.

[0066] Preferably, if Figure 9c As shown, at least one guide groove 144 is formed on the inner side of the spring upper seat 141 of the spring 140, which is connected to the spring guide strip 132 (see FIG. Figure 10 ) cooperate to guide the movement of the spring 140, as will be described in detail below.

[0067] like Figure 9d As shown, a guide groove 145 may also be formed on the inner side of the spring lower seat 142 of the spring 140 to facilitate the matching of the corresponding spring guide strip 132 on the cylinder 130.

[0068] In addition, preferably, the elastic strip 143 is shaped so that its projection in the axial direction of the lotion pump 100 is substantially arc-shaped. In other words, when viewed along the axial direction of the lotion pump 100, the elastic strip 143 extends around at least a portion of the outer circumference of the cylinder, such as Figure 9e and 9f In this way, the structure of the lotion pump 100, especially the structure of the portion below the mouthpiece 120 including the spring 140, can be made more compact.

[0069] certainly, Figures 9a to 9fThe preferred structure of spring 140 is shown. Modifications or omissions of certain structural components are possible. For example, the guide grooves 144 and 145 provided in the upper spring seat 141 and lower spring seat 142, respectively, may be omitted. Furthermore, spring 140 may also not include the upper spring seat 141 and lower spring seat 142, with the elastic strips 143 being fixed to the support seat 160 and the lower portion of the cylinder 130, respectively.

[0070] cylinder :

[0071] Figure 10 1 shows a front view of the cylinder 130. Figure 10 As shown, a notch 131 is formed on the outer wall of the cylinder 130 , and the guide block 161 of the support seat 160 is slidably accommodated in the notch 131 , so that the support seat 160 can only move longitudinally relative to the cylinder 130 but cannot rotate.

[0072] Preferably, a spring guide strip 132 is further provided on the outer periphery of the cylinder 130 , which cooperates with the guide groove 144 in the spring upper seat 141 of the spring 140 and / or the guide groove 145 in the spring lower seat 142 to guide the spring 140 .

[0073] The arrangement of the guide groove and the guide strip may also be interchanged, that is, the guide strip is formed on the spring upper seat 141 / the spring lower seat 142 , and the guide groove is formed on the cylinder 130 .

[0074] In addition, preferably, an undercut portion 133 is formed at the bottom of the outer wall of the cylinder 130 , which cooperates with the spring lower seat 142 of the spring 140 to fix the spring lower seat 142 and prevent the spring lower seat 142 from moving upward relative to the cylinder 130 .

[0075] braces :

[0076] Figure 11a and 11b The figures show a front view and a top view of the mouthpiece 120. As shown, a notch 121 is formed on 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 notch 121, the locking block 152 can pass through the notch 121, causing the piston rod 150 and the connected pressure head 110 to spring upward, thereby putting the lotion pump 100 into a standby state.

[0077] Lotion pump operation :

[0078] The following will refer to Figure 4 and 5 The operating principle of the lotion pump 100 according to the first embodiment will be described.

[0079] like Figure 4 As shown, the lotion pump 100 is in a locked state, which can be used for transportation, sales, and other applications. At this point, the support base 160 in the lotion pump 100 is at the highest point of its travel, and the spiral groove 162 in the support base 160 mates with the spiral ridge 151 in the piston rod 150. To operate the lotion pump 100 after purchasing the product, the user rotates the pressure head 110 in the opening direction, causing the piston rod 150 connected to the pressure head 110 to rotate together.

[0080] During the rotation of piston rod 150, the spiral ridge 151 on the outer surface of piston rod 150 interacts with the spiral groove 162 on support seat 160, causing support seat 160 to move downward relative to piston rod 150, that is, toward spring 140, until the spiral ridge 151 disengages from the spiral groove 162. During this process, support seat 160 applies a compressive force to spring 140, and the compressive force gradually increases. After the spiral ridge 151 disengages from the spiral groove 162, continued rotation of piston rod 150 causes the spiral groove 162 to shift away from the spiral ridge 151, causing the lower end of the spiral ridge 151 to abut against the upper surface of the spiral groove 162. At this point, spring 140 enters the standby state from the free non-standby state.

[0081] As the piston rod 150 rotates, the locking block 152 can also be moved to a position aligned with the notch 121 at the top of the dental brace 120. At this time, the locking block 152 can pass through the notch 121, thereby causing the ram 110 to spring to a standby state.

[0082] After use, if the lotion pump 100 needs to be returned to the locked state, the plunger 110 is depressed to the lowest point of its travel and then rotated in the closing direction, the opposite of the opening direction. During this process, the helical ridge 151 of the piston rod 150 reengages the helical groove 162 of the support seat 160. As the piston rod 150 rotates, the helical ridge 151 interacts with the helical groove 162, causing the support seat 160 to move upward, away from the spring 140, reducing the compressive force on the spring 140 and returning the spring 140 to the non-standby state. The support seat 160 can even be released from contact with the spring 140. It can be seen here that the helical ridge 151 switches the spring 140 between the non-standby and standby states, acting as a switching mechanism. Furthermore, the helical ridge 151 can also be considered to function as a decoupling mechanism for the spring 140 and the movable portion of the lotion pump 100, via the support seat 160.

[0083] Preferably, the relative positions and dimensions of the spiral ridge 151 and the locking block 152 in the piston rod 150 are set so that the spiral ridge 151 is released from the spiral groove 162 before the locking block 152 is aligned with the notch 121 of the toothed sleeve 120. This prevents the spiral ridge 151 from reentering the spiral groove 162 during the process of pressing the ram 110 to pump the product.

[0084] In addition, the longitudinal length of the locking block 152 is preferably set so that the locking block 152 always moves in the notch 121 during the process of pressing the pressure head 110 to pump the product and the pressure head 110 rebounding. In this way, during use, the spiral protrusion 151 can be prevented from entering the spiral groove 162 again due to the rotation of the pressure head 110.

[0085] It should be noted that, although in the above-described structure, the spiral ridge 151 serving as the switching mechanism is formed on the piston rod, the switching mechanism may also be formed on any other component or at any other location of the movable portion of the lotion pump 100, which is also within the scope of the present invention.

[0086] Furthermore, the switching mechanism may also be formed on a fixed portion of the lotion pump 100. For example, a spiral ridge may be formed on the inner wall of the cylinder 130, and a corresponding spiral groove may be formed on the outer circumference of the support base 160. Alternatively, in certain lotion pump structures, the piston rod having the spiral ridge is the fixed portion of the lotion pump, while the cylinder is the movable portion (this will be explained in detail in the following embodiments). These arrangements are also within the scope of the present disclosure.

[0087] <Second embodiment>

[0088] Figures 12a to 15b A lotion pump 200 according to a second embodiment of the present invention is shown. Technical features identical or similar to those of the lotion pump 100 according to the first embodiment will not be described in detail. Only those technical features of the lotion pump 200 according to the second embodiment that are not disclosed in the first embodiment will be described. Unless otherwise stated or there is a structural conflict, the technical features disclosed in the first embodiment also apply to the second embodiment.

[0089] Figure 12a and Figure 12bThe lotion pump 200 is shown in a locked state and in a standby state, respectively. The lotion pump 200 includes a pump head 210, a mouthpiece 220, a cylinder 230, a spring 240, and a piston rod 250. A support seat 260 is disposed within the cylinder 230. Similar to the first embodiment, a notch 231 is formed in the outer wall of the cylinder 230. A guide block 261 of the support seat 260 is slidably received in the notch 231, ensuring that the support seat 260 can only move longitudinally relative to the piston rod 250.

[0090] Figures 13a to 13d Various views of the support base 260 in the lotion pump 200 of the second embodiment are shown, wherein Figure 13a A top view of the support seat 260 is shown, Figure 13b A cross-sectional view of the support seat 260 is shown, Figure 13c Another cross-sectional view of the support seat 260 is shown, and Figure 13d A perspective view of the support base 260 is shown.

[0091] The support base 260 in the lotion pump 200 of the second embodiment is also generally annular and has at least one guide block 261 (two guide blocks 261 are shown in the figure). At least one support base notch 262 is formed on the inner side of the support base 260, preferably a pair of support base notches 262, as shown in the figure. At least one support base stopper 263 is also preferably formed on the inner side of the support base 260, preferably formed on the upper and lower portions of the inner side of the support base 260, respectively.

[0092] Figure 14a and 14b The figures show a front view and a perspective view of piston rod 250, respectively. A guide bar 251 is formed on the outer circumference of piston rod 250, corresponding to a support seat notch 262 provided in support seat 260. Furthermore, an upper locking block 252 and a lower locking block 253 are preferably formed on the outer circumference of piston rod 250, located above and below guide bar 251, respectively. The upper locking block 252 and the lower locking block 253 cooperate with the support seat stopper 263, ensuring that piston rod 250 can only rotate in a predetermined direction.

[0093] The piston rod 250 and the support seat 260 are as shown in FIG. Figure 15a and 15b Cooperate as shown.

[0094] The following will refer to Figure 12a 、 12b , 15a and 15b are used to describe the operation of the lotion pump 200 of the second embodiment.

[0095] like Figure 12a and 15aAs shown, when the lotion pump 200 is in the locked state, the support seat 260 is located above the guide strip 251 of the piston rod 250, and the support seat notch 262 is staggered from the guide strip 251, so that the position of the support seat 260 relative to the piston rod 250 is fixed.

[0096] To use the lotion pump 200, the pressure head 210 is rotated in the opening direction to align the support seat notch 262 with the guide bar 251. The pressure head 210 is then manually pulled upward to the highest point of its travel, causing the support seat 260 to move relative to the piston rod 250 below the guide bar 251. The pressure head 210 is then rotated further to align the support seat notch 262 with the guide bar 251 again, thereby trapping the support seat 260 in its lower position. At this point, the spring 240 is loaded, allowing the pressure head 210 to initiate pumping.

[0097] After use, if the lotion pump 200 is to be returned to the locked state, the pressure head 210 can be rotated in the opposite direction to align the support seat notch 262 with the guide strip 251 again. The pressure head 210 can then be manually pressed to the lowest point of its stroke and then further rotated to offset the support seat notch 262 from the guide strip 251. The guide strip 251 then holds the support seat 260 in its upper position.

[0098] Preferably, when an upper locking block 252 and a lower locking block 253 are provided on the piston rod 250 and a support seat stopper 263 is provided in the support seat 260, the interaction between the upper and lower locking blocks 252 and 253 and the support seat stopper 263 allows the user to rotate the pressure head 210 only in a predetermined direction.

[0099] <Third embodiment>

[0100] Figures 16a-17 A lotion pump 300 according to a third embodiment of the present invention is shown. Technical features identical or similar to those in the first and second embodiments will not be described in detail. Only those technical features of the lotion pump 300 according to the third embodiment that are not disclosed in the first and second embodiments will be described. Unless otherwise stated or there is a structural conflict, the technical features disclosed in the first and second embodiments also apply to the third embodiment.

[0101] The lotion pump 300 includes a pressure head 310, a mouthpiece 320, a cylinder 330, a spring 340, and a piston rod 350. The lotion pump 300 also includes a support base 360. In the lotion pump 300 of the third embodiment, an inverted ring 351 is formed on the piston rod 350. The inverted ring 351 is formed with a first inclined surface 352 facing upward. Correspondingly, a second inclined surface 361 facing downward is formed on the support base 360.

[0102] exist Figure 16a In the locked position shown, the ram 310 is at the lowest point of its travel, and the support base 360 is located above the inverted ring 351. After the ram 310 is rotated to the open position, the ram 310 is pulled upward to the highest point of its travel. During this process, the inverted ring 351 passes over the support base 360 and reaches above the support base 360. At this time, the structure of the inverted ring 351 prevents the support base 360 from returning to the top of the inverted ring 351. As a result, the lotion pump 300 is kept in the locked position. Figure 16b Shown in standby state.

[0103] <Fourth embodiment>

[0104] Figure 18a and 18b A lotion pump 400 according to a fourth embodiment of the present invention is shown. Technical features identical or similar to those in the first to third embodiments will not be described in detail. Only those technical features of the lotion pump 400 according to the fourth embodiment that are not disclosed in the first to third embodiments will be described. Unless otherwise stated or there is a structural conflict, the technical features disclosed in the first to third embodiments also apply to the fourth embodiment.

[0105] The lotion pump 400 of the fourth embodiment is substantially identical to the lotion pump 100 of the first embodiment, differing only in that the upper spring seat 141 and lower spring seat 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 support seat 460, while the lower end of the elastic strip is directly connected to the lower portion of the cylinder 430.

[0106] <Fifth embodiment>

[0107] like Figures 19a to 22 A lotion pump 500 according to a fifth embodiment of the present application is shown. Technical features identical or similar to those in the first to fourth embodiments will not be described in detail. Instead, only technical features of the lotion pump 500 according to the fifth embodiment that are not disclosed in the first to fourth embodiments will be described. Unless otherwise stated or there is a structural conflict, the technical features disclosed in the first to fourth embodiments also apply to the fifth embodiment.

[0108] Figure 19a 4 shows a cross-sectional view of the lotion pump 500 in a lower locked state, Figure 19b FIG shows a cross-sectional view of the lotion pump 500 in a standby state. Figure 19a and 19b As can be seen in the figure, in the fifth embodiment, the lower portion of the pressure head 510 of the lotion pump 500 is provided with an external thread, and is fixed in a locked position by a threaded connection with the socket 520. Figure 20FIG3 more clearly shows the external thread 511 on the press head 510. Accordingly, an internal thread matching the external thread 511 is formed in the opening of the toothed cap 520.

[0109] Further, if Figures 21-23 As shown, the piston rod 550 and piston 580 of the lotion pump 500 of the fifth embodiment are formed separately and connected together. The spiral ridges serving as switching members can be formed on the outer surface of either the piston rod 550 or the piston 580, or partially formed on the outer surface of the piston rod 550 and partially formed on the outer surface of the piston 580. In the structure shown in the figure, the outer surface of the piston 580 is formed with spiral ridges 581.

[0110] Of course, the structure of the inverted ring and the inclined surface in the third embodiment can also be applied to Figures 21-23 In the case shown, the piston rod is formed separately from the piston.

[0111] Figures 24-27 FIG4 shows a deformation mode of part of the structure in the fifth embodiment. In which, the piston rod 650 and the piston 680 are also formed separately and then connected together. Figures 21-23 The structure shown is different in that Figures 24-27 In the structure shown, a sleeve 670 is additionally provided, and a spiral ridge 671 or other type of switching component is formed on the outer surface of the sleeve 670. In addition, the sleeve 670 is sleeved on the outer surface of the piston rod 650 and the piston 680 connected together, as shown in FIG. Figure 27 As shown in . A structure such as a protrusion 672 may also be preferably formed on the inner surface of the sleeve 670 to facilitate a close fit with the outer surface of the piston rod 650 and / or the piston 680.

[0112] <Sixth embodiment>

[0113] Figure 28a and 28b A lotion pump 700 according to a sixth embodiment of the present application is shown. Technical features identical or similar to those of the first to fifth embodiments and their variations will not be described in detail. Instead, only the technical features unique to the lotion pump 700 according to the sixth embodiment will be described. Furthermore, unless otherwise stated or structurally conflicting, the technical features disclosed in the first to fifth embodiments and their variations also apply to the fifth embodiment.

[0114] Figure 28a A cross-sectional view of the lotion pump 700 is shown in the lower locking state. Figure 28bA cross-sectional view of a lotion pump 700 in a standby state is shown. As can be seen from the figure, the lotion pump 700 includes a pump head 710, with a cylinder 730 connected to the lower portion of the pump head 710. Thus, in the sixth embodiment, the movement of the pump head 710 (e.g., rotation or up and down movement) drives the cylinder 730 to move together, so that the pump head 710 and the cylinder 730 constitute at least a portion of the movable part of the lotion pump.

[0115] In addition, in the lotion pump 700 of the sixth embodiment, a spring bracket 770 is connected to the toothed sleeve 720, and one end of the spring 750 (at Figure 28a and 28b The spring 750 is supported on a spring support 770 (specifically the lower end in the figure), and the other end of the spring 750 (the upper end in the figure) is supported on a spring support seat 760.

[0116] A piston rod 740 is also fixedly connected to the spring bracket 770 , and a piston on one end of the piston rod 740 extends into the cylinder 730 .

[0117] like Figure 28a and 28b As shown, a first convex portion 731 and a second convex portion 732 are formed on the outer wall of the cylinder 730, and a groove 761 is formed on the inner surface of the spring support seat 760. As the pressure head 710 and the cylinder 730 move up and down, the groove 761 can be matched with one of the first convex portion 731 and the second convex portion 732 respectively. For example, when the groove 761 is matched with the convex portion 731 located above (as shown in FIG. Figure 28a state), the spring 750 is in a non-loaded state, and when the groove 761 cooperates with the second protrusion 732 located below, or is even located below the second protrusion 732, the spring 750 enters a loaded state.

[0118] Therefore, in the sixth embodiment, the switching mechanism is formed on the first convex portion 731 and the second convex portion 732 formed on the outer wall of the cylinder 730. Of course, the spiral convex strips, guide strips and other implementation structures mentioned in the above embodiments can also be applied to the sixth embodiment.

Claims

1. A lotion pump, comprising a movable part and a fixed part, wherein: The movable part includes a pressure head, a piston rod, and a piston, wherein the piston rod is connected to the lower part of the pressure head and the piston is provided on the piston rod. The fixed part includes a mouthpiece and a cylinder, wherein the cylinder is connected to the mouthpiece, and at least the portion of the piston rod where the piston is provided extends into the cylinder. The lotion pump further includes: an elastic return mechanism, the elastic return mechanism being arranged outside the cylinder and surrounding the outer circumference of the cylinder, one end of the elastic return mechanism being in contact with or connected to the movable portion, and the other end of the elastic return mechanism being fixed to the fixed portion, wherein the elastic return mechanism comprises at least one arcuate elastic strip, each of the elastic strips being shaped such that a projection of the elastic strip in the axial direction of the lotion pump is arc-shaped, so that when viewed along the axial direction of the lotion pump, the elastic strip extends around at least a portion of the outer circumference of the cylinder.

2. The lotion pump according to claim 1, wherein The elastic reset mechanism further includes: An annular spring upper seat, the upper end of the elastic strip is connected to the spring upper seat, and / or An annular spring lower seat is provided, and the lower end of the elastic strip is connected to the spring lower seat.

3. The lotion pump according to claim 2, wherein: The elastic strip is connected to the spring upper seat and / or the spring lower seat via a pivot portion, wherein the pivot portion pivots and folds when the elastic return mechanism is compressed.

4. The lotion pump according to claim 2, wherein: A first guide groove is formed on the inner side of the spring upper seat and one of the cylinders, and a first guide strip is formed on the inner side of the spring upper seat and the other of the cylinders, the first guide groove and the first guide strip being matched; and / or A second guide groove is formed on one of the inner side of the spring lower seat and the cylinder, and a second guide bar is formed on the other of the inner side of the spring lower seat and the cylinder, and the second guide groove and the second guide bar are matched.

5. The lotion pump according to any one of claims 2 to 4, characterized in that An undercut portion is provided at the lower portion of the cylinder, and the undercut portion fixes the spring lower seat of the elastic reset mechanism.

6. The lotion pump according to any one of claims 1 to 4, characterized in that The lotion pump further includes a switching mechanism configured to cooperate with the elastic reset mechanism so that when the pressure head is rotated in a first direction and / or moved upward, the one end of the elastic reset mechanism moves to a first position in a direction toward the other end of the elastic reset mechanism, thereby compressing the elastic reset mechanism and placing the elastic reset mechanism in a standby state; and when the pressure head is rotated in a second direction opposite to the first direction and / or moved downward, the one end of the elastic reset mechanism moves to a second position in a direction away from the other end of the elastic reset mechanism, placing the elastic reset mechanism in a non-standby state.

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