Pressing head and liquid container

Abstract

The utility model relates to a pressing head and a liquid container, and the pressing head comprises a pressing rod, and one end of the pressing rod is provided with a liquid outlet head; the limiting nut is provided with a first internal thread and is in threaded connection with the pressing rod through the first internal thread; the locking piece is arranged outside the pressing rod in a sleeving manner; the locking piece is provided with a locking position and a releasing position relative to the limiting nut. The locking piece is connected with the limiting nut when at the locking position and can prevent the limiting nut from rotating relative to the pressing rod in a threaded mode; when the locking piece is at the releasing position, the limiting nut is released so that the limiting nut can rotate relative to the pressing rod in a threaded mode. On the basis that the liquid outlet amount of the pressing head can be adjusted, the precision consistency of the liquid outlet amount of the pressing head in the using process can be guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of pressing heads for liquid containers, in particular to pressing heads and liquid containers. Background Art

[0002] When preparing beverages in milk tea shops, coffee shops, etc., pressing heads are usually used to squeeze ingredients such as syrups, fructose, and fruit juices from liquid containers. Due to beverage formula reasons, in the industry, pressing heads with various different liquid discharge volumes such as 5CC, 8CC, 10CC, 15CC, 20CC, 25CC, and 30CC are usually required. Generally, the pressing heads cannot adjust the liquid discharge volume, resulting in the need to prepare many types of pressing heads; generally, CC or ML is used as the measurement unit for pressing heads, and it is impossible to use grams as the measurement unit. In summary, the current pressing heads cannot expand the diversity of beverage products or the breadth of beverage research and development.

[0003] In some related technical solutions, there have emerged pressing heads that can adjust the liquid discharge volume. Such pressing heads include a pressing rod and a limit nut, and the limit nut is threadedly connected to the outside of the pressing rod. When the pressing head is pressed to the limit position, the limit nut abuts against the lid of the liquid container, thereby limiting the pressing stroke of the pressing head, that is, limiting the liquid discharge volume. Among them, the position of the limit nut on the pressing rod can be adjusted by screw rotation, thereby being able to adjust the pressing stroke of the pressing head, that is, adjusting the liquid discharge volume. However, when the pressing head is pressed, due to reasons such as vibration / friction, the pressing rod rotates relative to the limit nut in a threaded manner, so that the limit nut generates a position change along the pressing rod, and further the accuracy consistency of the liquid discharge volume cannot be guaranteed. Summary of the Utility Model

[0004] Based on this, it is necessary to provide a pressing head and a liquid container for at least one of the above technical problems.

[0005] This application provides a pressing head, which includes:

[0006] A pressing rod, with a liquid outlet head provided at one end of the pressing rod;

[0007] A limit nut, which has a first internal thread and is threadedly connected to the pressing rod through the first internal thread; and

[0008] A locking member, which is sleeved outside the pressing rod, and the locking member is located on the side of the limit nut close to the liquid outlet head;

[0009] Wherein, the locking member has a locking position and a release position relative to the limit nut; when the locking member is in the locking position, it is connected to the limit nut and can prevent the limit nut from rotating threadedly relative to the pressing rod; when the locking member is in the release position, the limit nut is released so that the limit nut can rotate threadedly relative to the pressing rod.

[0010] In one embodiment, the locking member is a locking nut which has a second internal thread and is threadedly connected to the pressing rod through the second internal thread. When in the locking position, the locking nut abuts against the limit nut.

[0011] The external thread of the pressing rod is a Tang thread, which includes a left-handed thread and a right-handed thread; wherein, among the first internal thread and the second internal thread, one is a left-handed thread and the other is a right-handed thread, so that when the pressing rod rotates relative to the limit nut and the locking nut, the limit nut and the locking nut move in opposite directions along the moving direction of the pressing rod.

[0012] One end of the limit nut has a first tension thread, and one end of the locking nut has a second tension thread. Among the first tension thread and the second tension thread, one is an internal thread and the other is an external thread, so that the limit nut and the locking nut are threadedly connected through the first tension thread and the second tension thread.

[0013] In one embodiment, the first internal thread is a right-handed thread and the second internal thread is a left-handed thread; or, the first internal thread is a left-handed thread and the second internal thread is a right-handed thread.

[0014] In one embodiment, the first tension thread is an external thread and the second tension thread is an internal thread; or, the second tension thread is an external thread and the first tension thread is an internal thread.

[0015] In one embodiment, among the limit nut and the locking nut, one of them has a first outer diameter section and a second outer diameter section, and the outer diameter of the first outer diameter section is greater than the outer diameter of the second outer diameter section. The first tension thread is located on the outer periphery of the second outer diameter section, so that a step surface is formed at the connection of the first outer diameter section and the second outer diameter section.

[0016] The outer diameter of the other one of the limit nut and the locking nut is uniform and the same as the outer diameter of the first outer diameter section; when the locking member is in the locking position, the end surface of the other one with uniform outer diameter abuts against the step surface.

[0017] In one embodiment, the helix directions of the first tension screw thread and the second tension screw thread are the same as that of the lock nut, or the helix directions of the first tension screw thread and the second tension screw thread are the same as that of the limit nut.

[0018] In one embodiment, a liquid discharge amount scale line is provided on the pressing rod, and the liquid discharge amount scale line includes a volume scale line and / or a weight scale line.

[0019] In one embodiment, the pressing head further includes a clamping portion, one end of the clamping portion is fixedly connected to one end of the limit nut, and the clamping portion surrounds the outer periphery of the pressing rod;

[0020] The locking member is a locking ring. When the locking member is in the locking position, it is sleeved on the clamping portion and abuts against the outer wall of the clamping portion, so that the inner wall of the clamping portion clamps the pressing rod; when the locking member is in the release position, it is separated from the clamping portion, so that the inner wall of the clamping portion releases the pressing rod.

[0021] In one embodiment, the clamping portion includes a plurality of clamping segments arranged at intervals in the circumferential direction of the pressing rod.

[0022] In one embodiment, the outer wall of the clamping portion and the inner wall of the locking member are in concave-convex fit.

[0023] In one embodiment, a plurality of strip-shaped protrusions are provided on the inner wall of the clamping portion, and the plurality of strip-shaped protrusions are arranged at intervals in the circumferential direction of the pressing rod, and the length direction of the strip-shaped protrusions is along the length direction of the pressing rod;

[0024] From the end of the strip-shaped protrusion close to the limit nut to the end of the strip-shaped protrusion far from the limit nut, the protruding size of the strip-shaped protrusion protruding from the clamping portion gradually increases.

[0025] The present application provides a liquid container, including: a container body, a cover body, a pump assembly, and the pressing head according to any one of the above embodiments; the cover body is connected to the container opening of the container body, and the pump assembly is located in the container body and connected to the cover body.

[0026] When it is necessary to adjust the liquid output volume of the pressing head, for the above-mentioned pressing head and liquid container, switch the locking member to the release position, which releases the limit nut, enabling the limit nut to rotate threadedly relative to the pressing rod, so that the position rotational displacement of the limit nut along the length direction of the pressing rod can be adjusted. After the adjustment is in place, switch the locking member to the locking position, and the locking member can prevent the limit nut from rotating threadedly relative to the pressing rod, thereby preventing the limit nut from shifting along the length direction of the pressing rod. In this way, when the pressing head is pressed and the pressing rod rotates due to reasons such as vibration / friction, since the locking member can prevent the limit nut from shifting along the length direction of the pressing rod, the accuracy of the pressing stroke of the pressing rod can be guaranteed, and further the accuracy consistency of the liquid output volume can be guaranteed. It can be seen that based on the ability to adjust the liquid output volume, the pressing head in the embodiment of the present application can ensure the accuracy consistency of the liquid output volume during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 FIG. is a schematic diagram of the connection relationship of the pressing head, the cover body, and the pump assembly in an embodiment.

[0028] Figure 2 FIG. is a perspective view of the pressing head in an embodiment.

[0029] Figure 3 FIG. is a schematic diagram of the connection relationship between the limit nut and the locking nut in an embodiment.

[0030] Figure 4 FIG. is a schematic diagram of the connection relationship between the limit nut and the locking member in another embodiment.

[0031] Figure 5 For Figure 4 the schematic diagram of the connection relationship between the limit nut and the clamping portion in

[0032] DESCRIPTION OF THE REFERENCE NUMERALS:

[0033] 100, pressing head;

[0034] 110, pressing rod; 111, left-handed thread; 112, right-handed thread;

[0035] 120, liquid outlet head;

[0036] 130, limit nut; 131, first internal thread; 132, first tensioning thread; 130a, first outer diameter section; 130b, second outer diameter section; 130c, step surface;

[0037] 140, locking member; 141, second internal thread; 142, second tensioning thread;

[0038] 150, clamping portion; 151, clamping section; 152, strip-shaped protrusion;

[0039] 200. Cover body; 300. Pump assembly. Detailed implementation manners

[0040] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0041] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0042] In addition, if there are terms such as "first" and "second", these terms are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if there is a term "plural", the meaning of "plural" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0043] In the present application, unless otherwise clearly defined and limited, if there are terms such as "installed", "connected", "connected to", "fixed", etc., these terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0044] In this application, unless otherwise clearly defined and limited, when a first feature is described as being "on" or "under" a second feature or the like, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0045] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0046] Please refer to Figures 1 to 3 , an embodiment of the present application provides a pressing head 100. The pressing head 100 includes: a pressing rod 110, a liquid outlet head 120, a limit nut 130 and a locking member 140. A liquid outlet head 120 is provided at one end of the pressing rod 110. The limit nut 130 has a first internal thread 131 and is threadedly connected to the pressing rod 110 through the first internal thread 131. The locking member 140 is sleeved outside the pressing rod 110. The locking member 140 is located on the side of the limit nut 130 close to the liquid outlet head 120. Among them, the locking member 140 has a locking position and a release position relative to the limit nut 130. The locking member 140 can switch between the locking position and the release position along the length direction of the pressing rod 110. When the locking member 140 is in the locking position, it is connected to the limit nut 130 and can prevent the limit nut 130 from rotating threadedly relative to the pressing rod 110. When the locking member 140 is in the release position, it releases the limit nut 130 so that the limit nut 130 can rotate threadedly relative to the pressing rod 110.

[0047] The pressing head 100 is applied to a liquid container. The liquid container includes: a container body (not shown), a cover body 200, a pump assembly 300, and a pressing head 100. The cover body 200 is connected to the container opening of the container body, and the pump assembly 300 is located inside the container body and connected to the cover body 200. The pressing rod 110 is movably inserted through the cover body 200 and connected to the pump assembly 300. After pressing and releasing the pressing head 100, the pump assembly 300 can be driven to extract the liquid in the container body, and then the liquid passes through the inside of the pressing rod 110 and is output through the liquid outlet head 120. It can be understood that the pressing rod 110 and the liquid outlet head 120 respectively have liquid channels so that the liquid extracted by the pump assembly 300 can pass through the liquid channels in the pressing rod 110 and the liquid outlet head 120 in sequence. Among them, the specific structure and working principle of the pump assembly 300 are prior art and will not be elaborated here.

[0048] When the pressing head 100 is pressed to the limit position, the limit nut 130 abuts against the cover body 200, that is, the pressing stroke of the pressing head 100 is limited by the abutment of the limit nut 130 against the cover body 200. By pressing the pressing head 100 to the limit position of its pressing stroke and then releasing it, the liquid output volume of the pressing head 100 can be limited. It can be understood that the size of the pressing stroke of the pressing head 100 determines the size of the liquid output volume of the pressing head 100. The liquid output volume described in the embodiments of the present application is the amount of liquid that can be output after the pressing head 100 is pressed to the limit position of its pressing stroke.

[0049] For the above-mentioned pressing head 100, when it is necessary to adjust the liquid output volume of the pressing head 100, the locking member 140 is switched to the release position, which releases the limit nut 130, so that the limit nut 130 can rotate threadedly relative to the pressing rod 110. Thus, the position rotational displacement of the limit nut 130 along the length direction of the pressing rod 110 can be adjusted, and further the liquid output volume can be arbitrarily adjusted within the adjustment range. Using one pressing head 100 can replace pressing heads of multiple specifications and models. After the limit nut 130 is adjusted in place, the locking member 140 is switched to the locking position, and the locking member 140 can prevent the limit nut 130 from rotating threadedly relative to the pressing rod 110, thereby preventing the limit nut 130 from shifting along the length direction of the pressing rod 110. In this way, when the pressing head 100 is pressed and the pressing rod 110 rotates due to reasons such as vibration / friction, since the locking member 140 can prevent the limit nut 130 from shifting along the length direction of the pressing rod 110, the accuracy of the pressing stroke of the pressing rod 110 can be guaranteed, and further the accuracy consistency of the liquid output volume can be guaranteed. It can be seen that the pressing head 100 in the embodiments of the present application can ensure the accuracy consistency of the liquid output volume during the use of the pressing head 100 on the basis of being able to adjust the liquid output volume.

[0050] Please refer to Figure 2 and Figure 3, in some embodiments, the locking member 140 is a locking nut which has a second internal thread 141 and is threadedly connected to the pressing rod 110 through the second internal thread 141.

[0051] The external thread of the pressing rod 110 is a Tang thread, which includes a left-handed thread 111 and a right-handed thread 112. The Tang thread is formed by compounding the left-handed thread 111 and the right-handed thread 112 on the same thread segment. Specifically, in this embodiment, the left-handed thread 111 and the right-handed thread 112 are compounded on the thread segment of the pressing rod 110.

[0052] Wherein, among the first internal thread 131 and the second internal thread 141, one is a left-handed thread and the other is a right-handed thread, and both of them cooperate with the Tang thread at the same time. In this way, when the pressing rod 110 rotates relative to the limit nut 130 and the locking nut, the limit nut 130 and the locking nut move in opposite directions along the moving direction of the pressing rod 110.

[0053] As Figure 3 shown, in this embodiment, the first internal thread 131 is a left-handed thread and the second internal thread 141 is a right-handed thread. In this way, when the pressing rod 110 rotates counterclockwise relative to the limit nut 130 and the locking nut, the limit nut 130 and the locking nut can move towards each other along the length direction of the pressing rod 110. When the pressing rod 110 rotates clockwise relative to the limit nut 130 and the locking nut, the limit nut 130 and the locking nut can move away from each other along the length direction of the pressing rod 110.

[0054] During the actual use of the pressing head 100, after adjusting the limit nut 130 to the position corresponding to the required liquid output, the locking member 140 is switched to the locking position. In the locking position, the locking nut abuts against the limit nut 130 along the length direction of the pressing rod 110. In this way, when the pressing head 100 is pressed and the pressing rod 110 rotates counterclockwise due to reasons such as vibration / friction, the limit nut 130 has a tendency to move towards the locking nut. However, since the locking nut also has a tendency to move towards the limit nut 130, the locking nut and the limit nut 130 will continuously abut tightly along the length direction of the pressing rod 110, resulting in that neither of them can move relative to the pressing rod 110 along the length direction of the pressing rod 110, nor can they rotate threadedly relative to the pressing rod 110. Therefore, it can prevent the limit nut 130 from shifting towards the locking nut.

[0055] Further, in order to prevent the limit nut 130 from shifting away from the locking nut, one end of the limit nut 130 has a first tension thread 132, and one end of the locking nut has a second tension thread 142. Among the first tension thread 132 and the second tension thread 142, one is an internal thread and the other is an external thread, so that the limit nut 130 and the locking nut are threadedly connected through the first tension thread 132 and the second tension thread 142.

[0056] When the pressing head 100 is pressed, when the pressing rod 110 rotates clockwise due to reasons such as vibration / friction, the limit nut 130 has a tendency to move away from the locking nut. However, since the limit nut 130 and the locking nut are threadedly connected through the first tension thread 132 and the second tension thread 142, the locking nut can prevent the limit nut 130 from moving relative to the pressing rod 110 in the direction away from the locking nut, and at the same time prevent the limit nut 130 from rotating threadedly relative to the pressing rod 110, thereby preventing the limit nut 130 from shifting away from the locking nut.

[0057] In summary, when the pressing head 100 is pressed, whether the pressing rod 110 rotates clockwise or counterclockwise due to reasons such as vibration / friction, the technical solution of this embodiment can prevent the limit nut 130 from rotating threadedly relative to the pressing rod 110 and shifting along the length direction of the pressing rod 110, thereby ensuring the pressing stroke of the pressing head 100 and the accuracy of the liquid output volume.

[0058] In some embodiments, the helix directions of the first tension thread 132 and the second tension thread 142 are the same as the helix direction of the locking nut. In this way, by keeping the pressing rod 110 and the limit nut 130 stationary and rotating the locking nut counterclockwise, while the locking nut rotates threadedly relative to the pressing rod 110, through the relative movement of the first tension thread 132 and the second tension thread 142, the locking nut rotates threadedly relative to the limit nut 130, and further the locking nut moves away from the limit nut 130, realizing the separation of the locking nut and the limit nut 130, that is, the locking member 140 is switched to the release position. At this time, the position of the limit nut 130 relative to the pressing rod 110 can be adjusted.

[0059] In some embodiments, a liquid output volume scale line is provided on the pressing rod 110.

[0060] Please refer to Figure 2 , in some embodiments, the liquid output volume scale line includes a capacity scale line. When the locking member 140 is switched to the release position, the position of the limit nut 130 can be adjusted according to the capacity scale line, so that the position of the limit nut 130 matches the scale corresponding to the liquid output volume of the required capacity.

[0061] Please refer to Figure 2, in some embodiments, the liquid discharge volume scale line includes a weight scale line. When the locking member 140 is switched to the release position, the position of the limit nut 130 can be adjusted according to the weight scale line, so that the position of the limit nut 130 matches the scale corresponding to the liquid discharge volume of the required weight.

[0062] In some embodiments, if only a capacity scale line is provided on the pressing rod 110 and no weight scale line is provided. If it is necessary to adjust the liquid discharge volume to an expected weight, an electronic scale can be used to cooperate with adjusting the position of the limit nut 130. For example, if we want to adjust the liquid discharge volume of a liquid ingredient (such as fructose liquid) to a weight of 6 grams, the density of the fructose liquid is greater than that of water, and the capacity corresponding to 6 grams of fructose is less than 6 CC. Therefore, the limit nut 130 can be first adjusted to around the 5 CC scale line, and then the pressing head 100 is pressed to discharge the liquid. Then, the fructose liquid discharged by the pressing head 100 is weighed with an electronic scale to determine whether the weight is 6 grams. If it is less than 6 grams, the position of the limit nut 130 is slightly adjusted towards the side close to the liquid discharge head 120; conversely, if it is greater than 6 grams, the position of the limit nut 130 is slightly adjusted towards the side away from the liquid discharge head 120. By repeating such tests, the limit nut 130 can be accurately adjusted to the capacity scale line corresponding to 6 grams of fructose solution.

[0063] In some embodiments, if only a weight scale line is provided on the pressing rod 110 and no capacity scale line is provided. If it is necessary to adjust the liquid discharge volume to an expected capacity, a standard measuring cup can be used to cooperate with adjusting the position of the limit nut 130. For example, if we want to adjust the liquid discharge volume of a liquid ingredient (such as fructose liquid) to a capacity of 7 CC, the density of the fructose liquid is greater than that of water, and the weight corresponding to 7 CC of fructose is greater than 7 grams. Therefore, the limit nut 130 can be first adjusted to around the 5 gram scale line, and then the pressing head 100 is pressed to discharge the liquid. Then, the fructose liquid discharged by the pressing head 100 is measured with a standard measuring cup to determine whether the capacity is 7 CC. If it is less than 7 CC, the position of the limit nut 130 is slightly adjusted towards the side close to the liquid discharge head 120; conversely, if it is greater than 7 CC, the position of the limit nut 130 is slightly adjusted towards the side away from the liquid discharge head 120. By repeating such tests, the limit nut 130 can be accurately adjusted to the capacity scale line corresponding to 7 CC of fructose solution.

[0064] In this embodiment, water can also be used as a carrier to find the position of the limit nut 130 corresponding to the expected capacity. Because 1 gram of water = 1 CC of water = 1 ML of water. If it is necessary to find the scale line corresponding to a capacity of 7 CC, the fructose liquid can be replaced with water, and the limit nut 130 can be adjusted to the scale line corresponding to a capacity of 7 CC in the same way as above, so that the position of the limit nut 130 can be more accurately adjusted to the scale line corresponding to the expected capacity.

[0065] In one embodiment, when the position of the limit nut 130 corresponds to the maximum liquid discharge amount of the pressing head 100 (as Figure 2 shown in the state, the position of the limit nut 130 is located at the maximum scale value of the liquid discharge amount scale line), the distance A1 from the locking nut 140 to the liquid outlet head 120 is greater than the length B1 of the first tension thread 132 and the second tension thread 142 along the length direction of the pressing rod 110.

[0066] Since the length of the first tension thread 132 and the second tension thread 142 along the length direction of the pressing rod 110 is B1, therefore, when the locking nut 140 moves a distance B1 along the length direction of the pressing rod 110 towards the liquid outlet head 120, the limit nut 130 can be released.

[0067] When the position of the limit nut 130 corresponds to the maximum liquid discharge amount of the pressing head 100, the distance A1 from the locking nut 140 to the liquid outlet head 120 is greater than B1. Therefore, the distance A1 can ensure that the locking nut 140 has sufficient moving space, enabling the locking nut 140 to smoothly release the limit nut 130.

[0068] In other embodiments, it may also be that the first internal thread 131 is a right-handed thread and the second internal thread 141 is a left-handed thread. When the locking member 140 is in the locking position, the locking nut abuts against the limit nut 130 along the length direction of the pressing rod 110. In this way, when the pressing head 100 is pressed and the pressing rod 110 rotates clockwise due to vibration / friction, etc., the locking nut and the limit nut 130 will continuously abut tightly along the length direction of the pressing rod 110, thereby preventing the limit nut 130 from shifting towards the locking nut. On the contrary, when the pressing rod 110 rotates counterclockwise due to vibration / friction, etc., since the limit nut 130 and the locking nut are threadedly connected through the first tension thread 132 and the second tension thread 142, the limit nut 130 can be prevented from shifting away from the locking nut. Correspondingly, by rotating the locking nut clockwise relative to the pressing rod 110 and the limit nut 130, the locking nut can be switched to the release position.

[0069] Please refer to Figure 3 , in some embodiments, the first tension thread 132 is an external thread and the second tension thread 142 is an internal thread.

[0070] In other embodiments, it may also be that the second tension thread 142 is an external thread and the first tension thread 132 is an internal thread.

[0071] Please refer to Figure 3, in some embodiments, among the limiting nut 130 and the locking nut, one of them has a first outer diameter section 130a and a second outer diameter section 130b. The outer diameter of the first outer diameter section 130a is greater than that of the second outer diameter section 130b. The first tension thread 132 is located on the outer periphery of the second outer diameter section 130b, so that a step surface 130c is formed at the connection between the first outer diameter section 130a and the second outer diameter section 130b.

[0072] The outer diameter of the other one of the limiting nut 130 and the locking nut is uniform and the same as the outer diameter of the first outer diameter section 130a. When the locking member 140 is in the locking position, the end surface of the other one with uniform outer diameter abuts against the step surface 130c.

[0073] In Figure 3 In the illustrated embodiment, the first tension thread 132 is an external thread and the second tension thread 142 is an internal thread. The limiting nut 130 has a first outer diameter section 130a and a second outer diameter section 130b. The outer diameter of the locking nut is uniform along its axial direction, and the outer diameter of the locking nut is the same as the outer diameter of the first outer diameter section 130a. When the locking member 140 is in the locking position, the end surface of the other one with uniform outer diameter abuts against the step surface 130c. Thus, when the locking nut is in the locking position, the end surface of the locking nut abuts against the step surface 130c. Since the outer diameter of the locking nut is the same as the outer diameter of the first outer diameter section 130a, the outer diameter consistency of the connection structure between the locking nut and the limiting nut 130 is relatively good.

[0074] In other embodiments, when the second tension thread 142 is an external thread and the first tension thread 132 is an internal thread, it may also be that the locking nut has a first outer diameter section and a second outer diameter section. The outer diameter of the limiting nut is uniform.

[0075] In some other embodiments, the helix directions of the first tension thread 132 and the second tension thread 142 are the same as the helix direction of the limiting nut 130. Thus, by keeping the pressing rod 110 and the locking nut 140 stationary and rotating the limiting nut 130, when the limiting nut 130 rotates threadedly relative to the pressing rod 110, due to the relative movement of the first tension thread 132 and the second tension thread 142, the limiting nut 130 rotates threadedly relative to the locking nut 140, and further the limiting nut 130 moves away from the locking nut, realizing the separation of the locking nut 140 from the limiting nut 130, that is, the locking member 140 is in the release position relative to the limiting nut 130. At this time, the position of the limiting nut 130 relative to the pressing rod 110 can be adjusted. After the limiting nut 130 is adjusted in place, the locking member 140 is then switched to the locking position and locked with the limiting nut 130 through the first tension thread 132 and the second tension thread 142.

[0076] In one embodiment, when the position of the limit nut 130 corresponds to the minimum liquid discharge amount of the pressing head 100 (the position of the limit nut 130 is at the minimum scale value of the liquid discharge amount scale line, that is, at the 0 value), the distance A2 from the limit nut 130 to the cover body 200 is greater than the length B2 of the first tensioning thread 132 and the second tensioning thread 142 along the length direction of the pressing rod 110.

[0077] Since the length of the first tensioning thread 132 and the second tensioning thread 142 along the length direction of the pressing rod 110 is B2, therefore, when the limit nut 130 moves a distance B2 along the length direction of the pressing rod 110 towards the liquid outlet head 120, it can be separated from the locking nut 140, so that the locking nut 140 releases the limit nut 130.

[0078] When the position of the limit nut 130 corresponds to the minimum liquid discharge amount of the pressing head 100, the distance A2 from the limit nut 130 to the cover body 200 is greater than B2. Therefore, the distance A2 can ensure that the limit nut 130 has sufficient moving space, so that the limit nut 130 can be separated from the locking nut 140.

[0079] Please refer to Figure 4 and Figure 5 , in some other embodiments, the locking member 140 is a locking ring. The pressing head 100 includes a clamping portion 150. One end of the clamping portion 150 is fixedly connected to one end of the limit nut 130, and the clamping portion 150 surrounds the outer periphery of the pressing rod 110.

[0080] When an external force is applied to the clamping portion 150, the clamping portion 150 can deform inwards along the radial direction of the pressing rod 110. When the external force is removed, the clamping portion 150 can recover its deformation along the radial direction outwards. The clamping portion 150 and the limit nut 130 can be an integrally formed structure.

[0081] When the locking member 140 is in the locking position, it is sleeved on the clamping portion 150 and abuts against the outer wall of the clamping portion 150, so that the inner wall of the clamping portion 150 clamps the pressing rod 110, so that the locking ring, the clamping portion 150, and the pressing rod 110 are clamped in sequence from the outside to the inside, and further can prevent the clamping portion 150 from rotating relative to the pressing rod 110. Also, since one end of the clamping portion 150 is fixedly connected to one end of the limit nut 130, it can also prevent the limit nut 130 from rotating threadedly relative to the pressing rod 110. In this way, when the pressing head 100 is pressed, due to reasons such as vibration / friction, when the pressing rod 110 rotates clockwise or counterclockwise, the technical solution of this embodiment can prevent the limit nut 130 from rotating threadedly relative to the pressing rod 110 and shifting along the length direction of the pressing rod 110, and further ensures the pressing stroke of the pressing head 100 and the accuracy consistency of the liquid discharge amount.

[0082] When the locking member 140 is in the release position, it is separated from the clamping portion 150, so that the inner wall of the clamping portion 150 releases the pressing rod 110, enabling the clamping portion 150 to rotate relative to the pressing rod 110. Further, the limit nut 130 can rotate threadedly relative to the pressing rod 110 to adjust the position of the limit nut 130.

[0083] Specifically, an external force can be applied to pull the locking member 140 to overcome the clamping force between the locking member 140 and the clamping portion 150, causing the locking member 140 to move away from the limit nut 130, and the locking member 140 switches to the release position. When switching from the release position to the locking position, the locking member 140 is sleeved on the clamping portion 150.

[0084] It can be understood that the clamping portion 150 not only has the ability of a certain amount of deformation and recovery of deformation, but also needs to have a certain hardness and strength, so that when the clamping portion 150 clamps the pressing rod 110, it can effectively prevent the limit nut 130 from rotating threadedly relative to the pressing rod 110. The material used for the clamping portion 150 is, for example, plastic, etc.

[0085] Please refer to Figure 5 In some embodiments, the clamping portion 150 includes a plurality of clamping segments 151 arranged at intervals in the circumferential direction of the pressing rod 110. Since the plurality of clamping segments 151 are arranged at intervals in sequence, when the clamping portion 150 deforms radially inward or outward along the pressing rod 110, the adjacent clamping segments 151 do not interfere with each other, facilitating the deformation of each clamping segment 151 radially inward or outward along the pressing rod 110.

[0086] Please refer to Figure 5 In some embodiments, the outer wall of the clamping portion 150 and the inner wall of the locking member 140 are in concave-convex fit. In this way, reliable cooperation between the clamping portion 150 and the locking member 140 can be achieved, and they are not easily displaced.

[0087] Please refer to Figure 5 In some embodiments, a plurality of strip-shaped protrusions 152 are provided on the inner wall of the clamping portion 150. The plurality of strip-shaped protrusions 152 are arranged at intervals in the circumferential direction of the pressing rod 110, and the length direction of the strip-shaped protrusions 152 is along the length direction of the pressing rod 110. In this way, the pressing rod 110 can be firmly clamped by the plurality of strip-shaped protrusions 152 abutted against it.

[0088] From the end of the strip-shaped protrusion 152 close to the limit nut 130 to the end away from the limit nut 130, the protruding size of the strip-shaped protrusion 152 protruding from the clamping portion 150 gradually increases. In this way, when the locking ring is sleeved on the clamping portion 150, the end of the strip-shaped protrusion 152 away from the limit nut 130 can fully abut against the pressing rod 110, thus firmly clamping the pressing rod 110.

[0089] An embodiment of the present application further provides a liquid container, which includes: a container body, a cover body 200, a pump assembly 300, and the pressing head 100 of any one of the above embodiments. The cover body 200 is connected to the container opening of the container body, and the pump assembly 300 is located inside the container body and connected to the cover body 200.

[0090] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0091] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A pressing head, characterized in that: The pressing head comprises: A pressing rod, one end of which is provided with a liquid outlet; A limiting nut, the limiting nut having a first internal thread and being threadedly connected to the pressing rod through the first internal thread; and A locking piece, which is sleeved outside the pressing rod and is located on a side of the limiting nut close to the liquid outlet head; Among them, the locking piece has a locking position and a releasing position relative to the limit nut; the locking piece is connected to the limit nut when in the locking position and can prevent the limit nut from rotating relative to the pressing rod thread; the locking piece releases the limit nut when in the releasing position so that the limit nut can rotate relative to the pressing rod thread.

2. The pressing head according to claim 1, characterized in that: The locking member is a locking nut, the locking nut has a second internal thread and is threadedly connected to the pressing rod through the second internal thread, and when in the locking position, the locking nut abuts against the limiting nut; The external thread of the pressing rod is a Tang's thread, which includes a left-hand thread and a right-hand thread; wherein one of the first internal thread and the second internal thread is a left-hand thread and the other is a right-hand thread, so that when the pressing rod rotates relative to the limiting nut and the locking nut, the limiting nut and the locking nut move in opposite directions along the pressing rod; One end of the limit nut has a first tightening thread, and one end of the locking nut has a second tightening thread. One of the first tightening thread and the second tightening thread is an internal thread and the other is an external thread, so that the limit nut and the locking nut are threadedly connected through the first tightening thread and the second tightening thread.

3. The pressing head according to claim 2, characterized in that: The first internal thread is a right-hand thread, and the second internal thread is a left-hand thread; or, the first internal thread is a left-hand thread, and the second internal thread is a right-hand thread.

4. The pressing head according to claim 2, characterized in that: The first tightening thread is an external thread, and the second tightening thread is an internal thread; or, the second tightening thread is an external thread, and the first tightening thread is an internal thread.

5. The pressing head according to claim 2, characterized in that: One of the limit nut and the locking nut has a first outer diameter section and a second outer diameter section, the outer diameter of the first outer diameter section is larger than the outer diameter of the second outer diameter section, and the first tightening thread is located at the outer periphery of the second outer diameter section, so that a step surface is formed at the connection between the first outer diameter section and the second outer diameter section; The outer diameter of the other of the limiting nut and the locking nut is uniform and the same as the outer diameter of the first outer diameter section; when the locking member is in the locking position, the end face of the other with uniform outer diameter abuts against the step surface.

6. The pressing head according to claim 2, characterized in that: The rotation direction of the first tightening thread and the second tightening thread is the same as the rotation direction of the locking nut, or the rotation direction of the first tightening thread and the second tightening thread is the same as the rotation direction of the limiting nut; And / or, the pressing rod is provided with liquid discharge volume scale lines, and the liquid discharge volume scale lines include capacity scale lines and / or weight scale lines.

7. The pressing head according to claim 1, characterized in that: It also includes a clamping part, one end of which is fixedly connected to one end of the limit nut, and the clamping part is arranged around the outer periphery of the pressing rod; The locking member is a locking ring, which is sleeved on the clamping part when in the locking position and abuts against the outer wall of the clamping part so that the inner wall of the clamping part clamps the pressing rod; the locking member is separated from the clamping part when in the releasing position so that the inner wall of the clamping part releases the pressing rod.

8. The pressing head according to claim 7, characterized in that: The clamping portion comprises a plurality of clamping segments arranged in sequence and at intervals along the circumference of the pressing rod; And / or, the outer wall of the clamping portion is matched with the inner wall of the locking member in a concave-convex manner.

9. The pressing head according to claim 7, characterized in that: The inner wall of the holding part is provided with a plurality of strip-shaped protrusions, and the plurality of strip-shaped protrusions are sequentially spaced along the circumference of the pressing rod, and the length direction of the strip-shaped protrusions is along the length direction of the pressing rod; From one end of the strip-shaped protrusion close to the limiting nut to one end away from the limiting nut, the protrusion size of the strip-shaped protrusion protruding from the clamping part gradually increases.

10. A liquid container, characterized in that: include: A container body, a cover body, a pump assembly, and a pressing head as described in any one of claims 1 to 9; the cover body is connected to the container mouth of the container body, and the pump assembly is located in the container body and connected to the cover body.

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