A stroke compensation mechanism and a dispensing device comprising the same

Abstract

The application discloses a stroke compensation mechanism and a dispensing device containing the same, and belongs to the technical field of stroke compensation. The stroke compensation mechanism comprises an elastic working element, a compensation spring, a pressing piece and a connecting piece. The compensation spring is connected in series with respect to the elastic working element. The pressing piece and the connecting piece are movably connected to pre-press the compensation spring. The pre-pressing force is approximately equal to the starting force of the elastic working element. The compensation spring is used to uniformly compensate the difference between the working stroke and the driving distance in the whole driving distance. The dispensing device comprises a shell, a button, a dispensing piece and the stroke compensation mechanism. The connecting piece is axially positioned at the pressing end of the dispensing piece. The pressing piece is axially positioned on the button. The dispensing piece has the elastic working element. The application can effectively solve the problem that the working stroke of the elastic working element does not match the predetermined driving distance. When applied to the dispensing field, the dispensing piece with different working strokes can start and end work at the same time.

Description

Technical Field

[0001] This invention relates to the field of travel compensation technology, and in particular to a travel compensation mechanism and a distribution device comprising the same. Background Technology

[0002] A dispensing device is a device capable of dispensing materials. Existing dispensing devices typically include a pump, which dispenses materials by pressing the pump. Common materials include cosmetics, pharmaceuticals, and consumer goods. The pump has an elastic working element, such as a spring. When the pump is pressed, this elastic element is simultaneously subjected to pressure that compresses it.

[0003] Traditional dispensing devices typically have only one press pump, which can only dispense one type of material. However, there are also application scenarios that require dispensing two types of materials simultaneously. To solve this problem, some dispensing devices are equipped with two press pumps. However, the strokes of these two press pumps must be the same so that they can work synchronously during the pressing operation.

[0004] However, in actual use, the distribution ratio of the two materials may not be 1:1. This requires a difference in the distribution volume of the two pumps. In existing technology, pumps with different output volumes have different dimensions and specifications, resulting in different working strokes. In this case, the pressing action is limited by the pump with the smaller stroke. That is, when the pump with the smaller stroke finishes its stroke, its elastic working element can no longer be compressed, causing the pressing action to stop. At this time, the working stroke of the pump with the larger stroke has not yet ended, meaning it has not fully compressed. This will result in the pump with the larger stroke possibly failing to distribute enough material smoothly (i.e., insufficient distribution volume), and the material distribution volume will also be unstable. Alternatively, the pump with the larger stroke can be started first, and after pressing a certain distance, the pump with the smaller stroke can be started. However, before the pump with the smaller stroke starts, only the pump with the larger stroke is discharging material, making it impossible to achieve the required synchronous distribution of the two materials in the correct proportion.

[0005] It is clear that there is no way to operate two pumps simultaneously with the same pressing action and make the two pumps output in a proportional and synchronized manner.

[0006] Therefore, a mechanism is needed to compensate for the stroke of a (short stroke) press pump so that its compensated working stroke is the same as that of a press pump with a larger stroke, thereby enabling two or more press pumps that originally had different working strokes to be operated simultaneously by the same pressing action.

[0007] Not limited to the field of distribution technology, the stroke compensation mechanism proposed in this invention can be applied to any field in the prior art where there is an elastic working element and the working stroke of the elastic working element does not match the driving distance. Summary of the Invention

[0008] In view of the problem of mismatch between the working stroke and driving distance of the elastic working element in the prior art, the purpose of the present invention is to provide a stroke compensation mechanism and a distribution device including the same, so as to at least partially solve the above-mentioned problem.

[0009] To achieve the above objectives, the technical solution of the present invention is as follows: In a first aspect, the present invention provides a travel compensation mechanism, comprising: A flexible working element, wherein the working stroke of the flexible working element is less than a predetermined driving distance; and A compensating spring, connected in series with respect to the elastic working element, is used to uniformly compensate for the difference between the working stroke and the driving distance over the entire driving distance; It also includes a pressing member and a connecting member that are movably connected relative to each other along the driving direction. The pressing member and the connecting member are used to limit the compensating spring to a pre-compression state, and the pre-compression force is adapted to the starting force of the elastic working element when it is working.

[0010] In some preferred embodiments, the elastic coefficient of the compensating spring is... k 2 =k 1 ×L 1 / (LL) 1 ） , k 1 The elastic coefficient of the elastic working element is... L 1 This refers to the working stroke of the elastic working element. L The driving distance is denoted as .

[0011] In some preferred embodiments, one end of the compensating spring is positioned relative to the pressing member along the driving direction, and the other end is positioned relative to the connecting member along the driving direction.

[0012] In some preferred embodiments, the pressing member has a socket for receiving the connector therein, the compensating spring is located in the socket, one end of the compensating spring abuts against the bottom of the socket and the other end abuts against the end face of the connector that extends into the socket; One of the socket cavity and the connector is provided with an annular flange, and the other is provided with a protrusion that interferes radially with the annular flange.

[0013] In some preferred embodiments, the pressing member has a receiving cavity for inserting the connecting member therein, the compensating spring is located outside the receiving cavity and sleeved on the outside of the connecting member, one end of the compensating spring abuts against the end face of the pressing member and the other end abuts against the limiting step, the limiting step being fixedly disposed relative to the outer wall of the connecting member; One of the socket cavity and the connector is provided with an annular flange, and the other is provided with a protrusion that interferes radially with the annular flange.

[0014] In some preferred embodiments, the pressing member has a socket for inserting the connector therein, the compensating spring is located outside the socket and sleeved on the outside of the connector, the outside of the connector is provided with a spring plate and a limiting step, the spring plate is movably sleeved on the outside of the connector, the limiting step is fixed relative to the outer wall of the connector, and the two ends of the compensating spring abut against the spring plate and the limiting step respectively; Wherein, the diameter of the spring plate is larger than the inner diameter of the socket cavity, and the outer wall of the end of the connector that extends into the socket cavity is provided with an anti-detachment flange, and the diameter of the anti-detachment flange is larger than the inner diameter of the spring plate.

[0015] In some preferred embodiments, the compensating spring is sleeved on the outside of the connector, one end of the compensating spring abuts against the limiting protrusion and the other end abuts against the limiting step, the limiting protrusion is fixedly disposed on the outer wall of the connector, and the limiting step is fixedly disposed relative to the outer wall of the connector; The limiting protrusion has a through channel along the driving direction, and the pressing member includes a pressing member that can pass through the through channel and provide pressing force to the compensating spring.

[0016] Secondly, the present invention also provides a dispensing device, including a housing, a button, a dispensing component, and a stroke compensation mechanism as described above. The dispensing component is fixed on the housing, the connecting member is positioned along the driving direction at the pressing end of the dispensing component, the pressing member is positioned along the driving direction on the button, and the dispensing component has the elastic working element.

[0017] In some preferred embodiments, the button is provided with a discharge channel, and the connector has a hollow channel that communicates with the discharge port of the dispensing component. The discharge channel is connected to the hollow channel in the connector via the pressing component.

[0018] In some preferred embodiments, the pressing member is further provided with a hollow guide rod that communicates with the discharge channel, and the guide rod is slidably connected to the hollow channel of the connector.

[0019] In some preferred embodiments, there are two or more distribution members arranged in parallel, each distribution member has an elastic working element, and the working stroke of the elastic working element in at least one distribution member is less than the driving distance, and a corresponding compensation spring is provided.

[0020] In some preferred embodiments, the working stroke of at least one of the distribution members' elastic working elements is equal to the drive distance.

[0021] The beneficial effects of the present invention using the above technical solution are as follows: The stroke compensation mechanism proposed in this invention, through the setting of a compensation spring, connects the compensation spring in series with the elastic working element. When driven by an external force, the compensation spring deforms simultaneously with the elastic working element. This compensation spring can uniformly compensate for the difference between the working stroke of the elastic working element and the driving distance over the entire driving distance, thereby matching the working stroke of the elastic working element with the predetermined driving distance. Furthermore, while achieving stroke compensation, it does not increase the driving force. When the stroke compensation mechanism proposed in this invention is applied to a distribution device with multiple pressing pumps, it can match the working stroke of each pressing pump with the pressing distance, thereby enabling pressing pumps of different specifications to simultaneously end their working stroke under the same pressing action, achieving simultaneous start and simultaneous end of work. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the principle of a travel compensation mechanism proposed in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the structure of a distribution device including a stroke compensation mechanism proposed in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the structure of a distribution device including a stroke compensation mechanism proposed in Embodiment 2 of the present invention; Figure 4 This is a schematic diagram of the structure of a distribution device including a stroke compensation mechanism proposed in Embodiment 3 of the present invention; Figure 5 This is a schematic diagram of the structure of a distribution device including a stroke compensation mechanism proposed in Embodiment 4 of the present invention; Figure 6 For along Figure 5 Sectional view of line AA in the middle; Figure 7 For along Figure 6 Sectional view of the middle BB line; Figure 8This is an isometric structural diagram of a dispensing device according to Embodiment 5 of the present invention; Figure 9 This is a schematic diagram showing the series connection between the distribution component and the compensation spring in Embodiment 5 of the present invention; Figure 10 This is a front view of a dispensing device according to Embodiment 5 of the present invention; In the diagram: 1-Elastic working element, 2-Compensating spring, 3-Housing shell, 4-Button, 41-Discharge channel, 42-Discharge port, 5-Distribution component, 6-Pressing component, 60-Pressure component, 61-Guide rod, 7-Connecting component, 8-Resistance structure, 81-Annular flange, 82-Protrusion, 83-Anti-detachment flange, 9-Limiting step, 10-Spring plate, 11-Limiting protrusion, 12-Through channel, 13-Material tube. Detailed Implementation

[0023] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the description of the structure of this invention shown in the accompanying drawings. They are only for the convenience of describing this invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] The terms "first" and "second" in this technical solution are merely designations for corresponding structures that are identical or similar, or that perform similar functions. They do not represent an arrangement of the importance of these structures, nor do they imply any ranking, comparison of size, or other meaning.

[0026] Furthermore, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two structures. Those skilled in the art can understand the specific meaning of the above terms in this invention by considering the overall concept of the invention and the specific context of the solution.

[0027] Example 1 A travel compensation agency, such as Figure 1-2 As shown, it includes an elastic working element 1 and a compensating spring 2.

[0028] The elastic working element 1 is, for example, a helical compression spring, and the working stroke of the elastic working element 1 is... L 1 And less than the predetermined driving distance. L The predetermined driving distance L Refers to external driving force F The displacement distance, which is specific and definite.

[0029] Compensating spring 2 is also a helical compression spring, connected in series with elastic working element 1. Compensating spring 2 is used to uniformly compensate for the working stroke of elastic working element 1 over the entire driving distance. L 1 With the predetermined driving distance L The difference between them, thus in the external driving force F Under the action of the elastic working element 1, the working stroke after compensation is made to match the external driving force. F Matching the displacement distance to avoid external driving force F The elastic working element 1 reaches the end of its stroke before the displacement is completed, which will cause the external driving force to... F Unable to continue displacement.

[0030] In this context, the elastic working element 1 and the compensating spring 2 are connected in series, meaning they are parallel to each other in the axial direction and arranged sequentially along this axial direction. They can be arranged coaxially or non-coaxially. This axial direction refers to the direction of the spring's axis and also the direction of the external driving force. F The direction of its effect.

[0031] like Figure 1 As shown, under external driving force F Under the action of the spring, both the elastic working element 1 and the compensating spring 2 connected in series are compressed, and the compression amount of the elastic working element 1 is... L 1 The compression of the compensating spring 2 is... L 2 Furthermore, the elastic forces acting on both the elastic working element 1 and the compensating spring 2 are equal to the external driving force. F ,Right now F = k 1 ×L 1 =k 2 ×L 2 ,and L 2 =LL 1 。

[0032] The elastic coefficient of the elastic working element 1 k 1 Working stroke of elastic working element 1 L 1 , predetermined driving distance L Given that all factors are known, the spring constant of compensating spring 2 is... k 2 Then it can be calculated, that is k 2 =k 1 ×L 1 / (LL) 1 ） .

[0033] Similarly, for external driving forces F The same applies to the case where the series-connected elastic working element 1 and the compensating spring 2 are stretched; simply replace the compression amount with the stretching amount accordingly.

[0034] Furthermore, the stroke compensation mechanism also includes a pressing member 6 and a connecting member 7. The pressing member 6 and the connecting member 7 together are used to limit the compensation spring 2 to a pre-compressed state and to match the pre-compressed force of the compensation spring 2 with the starting force of the elastic working element 1 when it is working. When the external driving force F When the force acts on the pressing element 6 and causes the pressing element 6 to move relative to the connecting element 7, the elastic working element 1 and the compensating spring 2 will be simultaneously subjected to external driving force. F The pressure exerted by the pressure causes it to compress synchronously.

[0035] One end (e.g., the lower end) of the pressing member 6 is provided with a socket cavity so that the compensating spring 2 can be installed into the socket cavity. The upper end of the pressing member 6 can be closed or a step with a diameter smaller than that of the compensating spring 2 can be provided so that the upper end of the compensating spring 2 can obtain a bearing point at the bottom of the socket cavity.

[0036] The diameter of the connector 7 is larger than the diameter of the compensating spring 2 (while the diameter of the connector 7 is smaller than the inner diameter of the socket cavity on the pressing member 6), so that the upper end of the connector 7 can extend into the socket cavity and provide a pre-compression force to the compensating spring 2, that is, the lower end of the compensating spring 2 abuts against the top of the connector 7, and the upper end of the compensating spring 2 abuts against the bottom of the socket cavity.

[0037] In addition, a resistance structure 8 is included, which is used to resist the tendency of the connector 7 to move based on the pre-tightening force in one direction, preventing the connector 7 from moving relative to the pressing member 6 under the action of the pre-tightening force (the direction of movement at this time is to make the connector 7 disengage from the socket cavity). At the same time, the resistance structure 8 does not affect the movement of the connector 7 to a deeper part of the socket cavity, that is, it does not affect the continued compression of the compensating spring 2.

[0038] For example, the resisting structure 8 includes an annular flange 81 formed on the upper end of the outer wall of the connector 7, and also includes a protrusion 82 formed on the inner wall of the socket cavity. There are usually multiple protrusions 82 evenly distributed circumferentially, and the protrusions 82 can also be annular. After the connector 7 is assembled into the socket cavity, the annular flange 81 is located on the deeper side, and the annular flange 81 and the protrusion 82 interfere with each other radially. Therefore, when the connector 7 is disengaged from the pressing member 6, the annular flange 81 is blocked by the protrusion 82 and cannot disengage, thus allowing the compensating spring 2 to be pre-pressed into the socket cavity of the pressing member 6. Of course, under sufficient external force, the connector 7 and the pressing member 6 will deform, causing the resisting structure 8 to fail, allowing for the disassembly and assembly of the connector 7 and the pressing member 6.

[0039] Example 2 This embodiment provides another method for pre-compressing the compensation spring 2.

[0040] Compared with Example 1, such as Figure 3 As shown, the difference in this embodiment is that the compensating spring 2 is located outside the socket cavity, and the compensating spring 2 is sleeved on the outside of the connector 7.

[0041] Meanwhile, the diameter of the compensating spring 2 is larger than the inner diameter of the annular flange 81, so that the compensating spring 2 will not extend into the socket cavity, that is, the upper end of the compensating spring 2 presses against the lower end face of the pressing member 6.

[0042] Additionally, a limiting step 9 is fixedly provided on the outer side of the connector 7. For example, the limiting step 9 can be a component independent of the connector 7, such as the distribution member 5 mentioned in other embodiments, whose upper edge end face forms a limiting step 9 for supporting the lower end of the compensating spring 2. Of course, in other preferred embodiments, the limiting step 9 can also be directly fixedly provided on the outer wall of the connector 7, for example, integrally formed.

[0043] This configuration ensures that the compensating spring 2 is pre-compressed between the pressing member 6 and the limiting step 9, and that when an external force is applied... F When pressed on the pressing member 6, the pressing member 6 can move relative to the connecting member 7 first, directly compressing the compensating spring 2.

[0044] Example 3 This embodiment provides another method for pre-compressing the compensation spring 2.

[0045] Compared with Example 2, such as Figure 4 As shown, the difference in this embodiment is that the upper end of the compensating spring 2 does not directly press against the lower end face of the pressing member 6, but instead a spring plate 10 is movably sleeved on the outside of the connecting member 7. That is, the spring plate 10 has an inner hole through which the connecting member 7 passes, so that the upper end of the compensating spring 2 presses against the lower end face of the spring plate 10, while the lower end of the compensating spring still presses against the limiting step 9. In this embodiment, the limiting step 9 is preferably directly fixed on the outer wall of the connecting member 7, for example, integrally formed. Of course, embodiment 2 can also be referred to.

[0046] Compared with Embodiment 2, the further difference in this embodiment is that the resistance structure 8 is reconfigured to include an anti-detachment flange 83, which is fixedly disposed on the outer wall of the end of the connector 7 that extends into the socket cavity, and the diameter of the anti-detachment flange 83 is larger than the inner diameter of the spring plate 10.

[0047] This configuration ensures that the compensating spring 2 is pre-compressed between the spring plate 10 and the limiting step 9, and that when an external force is applied... F When pressed on the pressing member 6, the pressing member 6 can first move relative to the connecting member 7, pushing the spring plate 10 to move downward, thereby compressing the compensation spring 2.

[0048] Example 4 This embodiment provides another method for pre-compressing the compensation spring 2.

[0049] Compared with Example 2, such as Figure 5-7 As shown, the difference in this embodiment is that a limiting protrusion 11 is fixedly provided on the outer wall of the connector 7, for example, integrally formed, and the diameter of the limiting protrusion 11 is larger than the diameter of the compensating spring 2, so that the upper end of the compensating spring 2 abuts against the lower end face of the limiting protrusion 11, while the lower end of the compensating spring still abuts against the limiting step 9. The limiting step 9 can refer to Embodiment 2 or Embodiment 3. The limiting protrusion 11 is preferably annular so as to uniformly restrict the compensating spring 2 circumferentially.

[0050] Compared to the above embodiments, in this embodiment, the components (limiting step 9 and limiting protrusion 11) pressed by the upper and lower ends of the compensating spring 2 are fixed relative to the connecting member 7, so there is no need to configure an additional resistance structure 8.

[0051] However, in this embodiment, the limiting protrusion 11 is provided with a through channel 12 along the driving direction, and the pressing member 6 includes a pressing member 60 that can pass through the through channel 12 and provide pressing force to the compensation spring 2.

[0052] The through channel 12 can be an open slot, and there are usually multiple through channels 12 arranged evenly around the circumference. Correspondingly, the pressing member 60 can be a strip-shaped component extending from the lower end face of the pressing member 6, thus eliminating the need for a socket cavity; or, multiple through slots can be evenly formed around the wall of the socket cavity, with the portion between adjacent through slots constituting the required pressing member 60; or, the socket cavity can be retained, and the pressing member 60 can be fixedly mounted on the wall of the socket cavity, for example, integrally formed.

[0053] Of course, in other preferred embodiments, the through channel 12 can be hole-shaped, that is, without any notches in the circumferential direction. In this case, the configuration method of integrally forming the pressing member 60 on the cavity wall of the socket cavity cannot be realized. Two other methods can be selected to configure the pressing member 60.

[0054] Example 5 A dispensing device, such as Figure 2 and Figure 8-10 As shown, it includes a housing 3, a button 4, and a distribution component 5.

[0055] Dispensing component 5 is fixedly installed in housing 3. Dispensing component 5 is a part that performs a dispensing function under the drive of an external driving force, such as a pump. It has a spring, which is the aforementioned elastic working element 1. By operating the pressing end of dispensing component 5, an axial pressing force is applied to the elastic working element 1, thereby enabling dispensing component 5 to perform its dispensing function. During the pressing operation, the maximum pressing distance of dispensing component 5 is the working stroke of the elastic working element 1. L 1 .

[0056] The button 4 is provided with a discharge channel 41, and the discharge channel 41 forms a discharge port 42 on the side wall of the button 4. The discharge channel 41 is also connected to the discharge port (also the pressing end) of the distribution component 5.

[0057] In conventional technology, button 4 is directly fixedly mounted on the pressing end of the distribution member 5. When a pressing force (e.g., external driving force) is applied to button 4 along the axial direction (axial direction refers to the direction of movement of the elastic working element 1 in the distribution member 5), the button is pressed. F When the force is applied, it is transmitted to the elastic working element 1 in the distribution component 5, thereby causing the elastic working element 1 in the distribution component 5 to be compressed. When the button 4 moves the required distance (referring to the displacement of the button 4 under the action of the external driving force F, i.e., the predetermined driving distance), the force is transmitted to the elastic working element 1 in the distribution component 5, thereby causing the elastic working element 1 in the distribution component 5 to be compressed. L The working stroke of the elastic working element 1 is greater than that of the elastic working element 1. L 1 If button 4 and the distribution component 5 are connected by a rigid structure, the movement distance of button 4 will reach [a certain value]. L 1 The problem then arises where the pressure can no longer be applied.

[0058] Therefore, the distribution device provided in this embodiment also includes the stroke compensation mechanism provided in the above embodiment, that is, in addition to the elastic working element 1 in the distribution component 5, it also includes the compensation spring 2, the pressing component 6, and the connecting component 7.

[0059] The connector 7 can also be used as a material conveying component. For example, it has a hollow channel opened along the axial direction. The lower end of the connector 7 is axially positioned at the discharge port of the distributor 5. For example, the two are connected by a hole-shaft fit. One of the holes in the connector 7 and the discharge port of the distributor 5 has a step inside. The other is abutted on the step to achieve axial positioning, so that the connector 7 is positioned in the axial direction relative to the discharge port of the distributor 5. The relative rotation of the two in the circumferential direction is not restricted.

[0060] The socket cavity in the pressing member 6 can also be used as a material conveying component when necessary (e.g., when the connecting member 7 and the socket cavity are sealed). The pressing member 6 is disposed inside the button 4 and is usually integrally formed inside the button 4. The discharge channel 41 of the button 4 is connected to the socket cavity in the pressing member 6. For example, a through hole is provided at the upper end of the sealed pressing member 6. This through hole is connected to the socket cavity on one hand and to the discharge channel 41 on the other hand. This allows the material distributed by the dispensing member 5 to enter the discharge channel 41 through the hollow channel in the connecting member 7 and the pressing member 6. In other preferred embodiments, the pressing member 6 and the button 4 can also be two independent structures, and the pressing member 6 is also axially positioned relative to the button 4. For example, the button 4 has a cylindrical groove that matches the outer wall of the pressing member 6. The pressing member 6 and the cylindrical groove are connected by a hole-shaft fit, and the relative circumferential rotation between the two is not restricted.

[0061] In some preferred embodiments, when there is no seal between the socket cavity of the pressing member 6 and the connecting member 7, a hollow guide rod 61 can be provided at the bottom of the socket cavity of the pressing member 6. The guide rod 61 is usually integrally formed on the button 4, and the through hole at the bottom of the socket cavity is completely within the hollow channel of the guide rod 61, so that the upper end of the guide rod 61 can communicate with the discharge channel 41. The lower end of the guide rod 61 extends into the hollow channel of the connecting member 7, and the lower end of the guide rod 61 is adapted to the hollow channel of the connecting member 7, so that the guide rod 61 can move axially relative to the connecting member 7, playing an axial guiding role, and can also form a seal between the guide rod 61 and the hollow channel of the connecting member 7. The compensating spring 2 is sleeved on the outside of the guide rod 61. In the case where there may be no socket cavity in Embodiment 4, the guide rod 61 is set at the center of the pressing member 60, and a through hole is also opened on the pressing member 6 so that the guide rod 61 is connected to the discharge channel in the button 4 through the through hole.

[0062] Thus when external driving forceF When applied to button 4, the force acts simultaneously on the elastic working element 1 in the distribution component 5 and the compensating spring 2 in the pressing component 6, and the elastic working element 1 and the compensating spring 2 are connected in series.

[0063] As can be seen from the above embodiments, the elastic coefficient of the compensating spring 2 is... k 2 It can be calculated, that is k 2 =k 1 ×L 1 / （L- L 1 ） Thus, under the compensating action of the compensating spring 2, when the external driving force... F When button 4 is moved, compensating spring 2 and distribution component 5 (elastic working element 1) are compressed simultaneously, and under external driving force... F The movement distance of button 4 reaches L At the same time, the distribution component 5 (the elastic working element 1 in it) also completes its working stroke. L 1 This allows the working stroke of the distribution component 5 to be adjusted. L 1 Always with external driving force F The displacement is matched, so that the material can be pumped out evenly over the entire drive distance of the distribution device, which improves the existing technical problem that the material is only pumped in a certain part of the drive distance when the drive distance is greater than the working stroke.

[0064] It is easy to understand that there are other resistances when the distribution device is working, such as frictional resistance. These other resistances also belong to the starting force of the distribution device. That is, the starting force is specifically equal to the sum of the pre-compression force of the elastic working element 1 and the other resistances when the distribution device is working. The pre-compression force of the compensating spring 2 can be appropriately increased, for example, by changing the position of the resistance structure 8, so that the pre-compression force of the compensating spring 2 can always match the starting force when the distribution device is working.

[0065] In some preferred embodiments, the dispensing device may include two or more (i.e., ≥2) dispensing components 5, which are arranged in parallel, i.e., each dispensing component 5 is fixed on the housing 3, and each dispensing component 5 receives the pressing force from the button 4.

[0066] Each distribution component 5 has a flexible working element 1. Typically, the working stroke of the flexible working element 1 in each distribution component 5 is not exactly the same, i.e., the working stroke... L 1 They vary in size, and at least one of the distribution components 5 has a working stroke of the elastic working element 1.L 1 The distance is less than the predetermined driving distance, and the distribution piece 5 is correspondingly equipped with a compensation spring 2.

[0067] Among the various distribution components 5, the elastic working element 1 with the longest working stroke has a working stroke that is the predetermined driving distance, i.e. L The displacement of button 4 is determined by the distributor 5 with the largest working stroke. Therefore, when button 4 is pressed, its displacement (i.e., the driving distance) is equal to the working stroke of the distributor 5 with the largest working stroke. A smaller working stroke (meaning a working stroke less than...) L The distribution component 5 needs to compensate for its working stroke through a series-connected compensation spring 2. The required elastic coefficient of the compensation spring 2 is based on... k 2 =k 1 ×L 1 / (LL) 1 ） Perform the calculation.

[0068] For the distribution component 5, which does not require compensation spring 2 for stroke compensation, its discharge port is connected to the discharge channel 41 through a hollow material tube 13. The material tube 13 is integrally formed on the button 4, and the material tube 13 is also used to transmit pressing pressure to the distribution component 5.

[0069] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A trip compensation mechanism, characterized in that, include: A flexible working element, wherein the working stroke of the flexible working element is less than a predetermined driving distance; as well as A compensating spring, connected in series with respect to the elastic working element, is used to uniformly compensate for the difference between the working stroke and the driving distance over the entire driving distance; It also includes a pressing member and a connecting member that are movably connected relative to each other along the driving direction. The pressing member and the connecting member are used to limit the compensating spring to a pre-compression state, and the pre-compression force is adapted to the starting force of the elastic working element when it is working.

2. The travel compensation mechanism according to claim 1, characterized in that: The spring constant of the compensation spring k 2 =k 1 × L 1 / (LL) 1 ） , k 1 The elastic coefficient of the elastic working element is... L 1 This refers to the working stroke of the elastic working element. L The driving distance is denoted as .

3. The travel compensation mechanism according to claim 1, characterized in that: One end of the compensation spring is positioned relative to the pressing member along the driving direction, and the other end is positioned relative to the connecting member along the driving direction.

4. The travel compensation mechanism according to claim 3, characterized in that: The pressing member has a socket for inserting the connector therein. The compensating spring is located in the socket, with one end of the compensating spring pressing against the bottom of the socket and the other end pressing against the end face of the connector that extends into the socket. One of the socket cavity and the connector is provided with an annular flange, and the other is provided with a protrusion that interferes radially with the annular flange.

5. The travel compensation mechanism according to claim 3, characterized in that: The pressing member has a socket for inserting the connector therein. The compensating spring is located outside the socket and sleeved on the outside of the connector. One end of the compensating spring presses against the end face of the pressing member and the other end presses against the limiting step. The limiting step is fixedly set relative to the outer wall of the connector. One of the socket cavity and the connector is provided with an annular flange, and the other is provided with a protrusion that interferes radially with the annular flange.

6. The travel compensation mechanism according to claim 3, characterized in that: The pressing member has a socket for inserting the connector therein. The compensating spring is located outside the socket and sleeved on the outside of the connector. The outside of the connector is provided with a spring plate and a limiting step. The spring plate is movably sleeved on the outside of the connector. The limiting step is fixed relative to the outer wall of the connector. The two ends of the compensating spring abut against the spring plate and the limiting step, respectively. Wherein, the diameter of the spring plate is larger than the inner diameter of the socket cavity, and the outer wall of the end of the connector that extends into the socket cavity is provided with an anti-detachment flange, and the diameter of the anti-detachment flange is larger than the inner diameter of the spring plate.

7. The travel compensation mechanism according to claim 3, characterized in that: The compensating spring is sleeved on the outside of the connector. One end of the compensating spring abuts against the limiting protrusion and the other end abuts against the limiting step. The limiting protrusion is fixedly disposed on the outer wall of the connector, and the limiting step is fixedly disposed relative to the outer wall of the connector. The limiting protrusion has a through channel along the driving direction, and the pressing member includes a pressing member that can pass through the through channel and provide pressing force to the compensating spring.

8. A dispensing device, characterized in that: The device includes a housing, a button, a distribution member, and a stroke compensation mechanism as described in any one of claims 1-7, wherein the distribution member is fixed to the housing, the connecting member is positioned along the driving direction at the pressing end of the distribution member, the pressing member is positioned along the driving direction on the button, and the distribution member has the elastic working element.

9. The dispensing device according to claim 8, characterized in that: The button is provided with a discharge channel, and the connector has a hollow channel that communicates with the discharge port of the distribution component. The discharge channel is connected to the hollow channel in the connector via the pressing component.

10. The dispensing device according to claim 9, characterized in that: The pressing component is also provided with a hollow guide rod that is connected to the discharge channel. The guide rod is slidably connected to the hollow channel of the connector.

11. The dispensing device according to any one of claims 8-10, characterized in that: The distribution components are two or more arranged in parallel, each of the distribution components has an elastic working element, and the working stroke of the elastic working element in at least one of the distribution components is less than the driving distance, and a corresponding compensation spring is provided.

12. The dispensing device according to claim 11, characterized in that: The working stroke of at least one of the elastic working elements in the distribution component is equal to the driving distance.

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