Peristaltic pump shell locking structure
By designing a locking switch structure on the peristaltic pump housing, and utilizing the cooperation of the locking tongue and spring, the problem of unreliable locking is solved, achieving a stable connection of the peristaltic pump housing and making operation simple.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-18
- Publication Date
- 2026-04-07
AI Technical Summary
Existing peristaltic pump housings are prone to insecure locking during the tightening process.
The locking switch structure includes components such as a locking tongue, a pressing block, first and second springs, and a lifting spring. The locking switch achieves a stable connection through a beveled fit and an elastic structure.
It achieves a secure locking of the peristaltic pump housing, is easy to operate, requires no tools, and ensures a stable connection of the pump cover.
Smart Images
Figure CN224093544U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of peristaltic pumps, and in particular relates to a peristaltic pump housing locking structure. Background Technology
[0002] A peristaltic pump is a special type of positive displacement pump, mainly used for fluid distribution or transportation, and widely used in industries such as pharmaceuticals, food, and chemicals. When the pump head of a peristaltic pump is working, the rollers rotate, forming a "pillow" shape of fluid in a section of pump tubing between the two rollers. The fluid is pumped by alternately squeezing and releasing the pump's elastic delivery hose; the volume of the "pillow" affects the flow rate; the rotational speed of the rollers also affects the flow rate.
[0003] The purpose of this utility model is to solve a problem of locking the housing of existing peristaltic pumps: (1) When the peristaltic pump is in use, it is closed by using the pump cover, but when the pump cover is closed and locked, it is easy to be unreliable and not tight. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a peristaltic pump housing locking structure. It is simple to operate and structure, and provides a reliable locking mechanism.
[0005] This utility model is achieved through the following technical solution:
[0006] A peristaltic pump housing locking structure includes an upper housing and a lower housing of the pump, which are connected by a locking switch; the lower housing is provided with a locking hole; the outer shell of the locking switch is installed on the upper housing of the pump, and the locking tongue of the locking switch corresponds to the locking hole.
[0007] The locking switch includes a housing, a pressing block, and a locking tongue; the pressing block, the locking tongue, and the first spring are all located in the housing; wherein, the pressing block is constrained in the housing and has the freedom to move up and down in the housing; the bottom of the pressing block is provided with a first inclined surface;
[0008] The latch is constrained to the bottom of the housing and has the freedom to move laterally; the inner side of the latch is provided with a second inclined surface, and the first and second inclined surfaces are in close contact and can slide relative to each other;
[0009] A lifting spring is provided between the lower housing and the outer shell of the locking switch.
[0010] Furthermore, the lower housing is provided with a limiting hole; the lifting spring is located in the limiting hole, and its top is provided with a spring cap, which is constrained in the limiting hole and has the freedom to move up and down along the central axis of the limiting hole.
[0011] Furthermore, the lower housing is provided with a through hole, in which a set screw is threadedly connected; the lifting spring and the spring cap are both sleeved on the shank of the set screw, and the shank of the set screw has the freedom to slide up and down.
[0012] Furthermore, in the locked state of the upper and lower housings, the latch portion is located in the lock hole of the lower housing, with the first and second inclined surfaces partially engaged; in the unlocked state, the latch is located in the outer shell, with the first and second inclined surfaces fully engaged.
[0013] Furthermore, the latch includes a latch portion and a beveled structure portion, wherein the latch portion engages with the lock hole; the beveled structure portion and the latch portion are integrated into a single design, and the beveled structure portion and the latch portion form a ring structure, with a second bevel located on the beveled structure portion and inside the ring structure.
[0014] Furthermore, the locking switch also includes a second spring located in the housing, between the housing sidewall and the locking tongue.
[0015] Furthermore, the locking switch also includes a first spring; the housing is provided with a partition, which is divided into upper and lower layers, and the partition has a through hole in the middle for connecting the upper and lower layers; the pressing block is located in the upper layer, and the locking tongue is located in the lower layer; the first spring is located between the partition and the pressing block; the first inclined surface of the pressing block passes through the through hole and engages with the second inclined surface.
[0016] Furthermore, the outer shell is provided with a vertical limiting groove, and a limiting block is provided on one side of the pressing block; the limiting block is located in the limiting groove and has the freedom to move up and down in the limiting groove.
[0017] Furthermore, a locking nut is pre-embedded in the mounting hole of the upper housing; the locking switch is located in the mounting hole, and its outer shell is provided with external threads, which cooperate with the locking nut; the top protrusion of the locking switch outer shell rests on the edge of the mounting hole of the upper housing.
[0018] Furthermore, the height at which the pressing block is triggered to unlock is lower than the height of the top edge of the upper housing.
[0019] Compared with the prior art, the beneficial effects of this utility model are:
[0020] (1) The locking is secure. Due to the elasticity of the latch structure, the spring cap, and the lifting spring, the latch is firmly fixed at the notch of the lower housing in the locked state.
[0021] (2) The operation and mechanism are simple and no tools are required. Pressing the locking switch and the linkage of the locking tongue with the locking device to achieve locking and popping is achieved by the spring cap below the locking device. Attached Figure Description
[0022] Figure 1This is a structural cross-sectional view of an embodiment of the present utility model;
[0023] Figure 2 yes Figure 1 Structural cross-sectional view of the lower and middle shells;
[0024] Figure 3 yes Figure 1 Structural cross-sectional view of the upper and middle shells;
[0025] Figure 4 yes Figure 1 Cross-sectional view of the locking switch.
[0026] In the diagram: 1. Upper housing, 2. Locking tongue, 3. Lower housing, 4. Locking nut, 5. Pressing block, 6. Top edge, 3-1. Set screw, 3-2. Lifting spring, 3-3. Locking hole, 3-4. Spring cap, 1-1. Edge, 7. Outer shell, 8. Limiting block, 7-1. Top protrusion, 7-2. Partition plate, 7-3. Limiting groove, 9. First spring, 10. Second spring. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.
[0028] Reference Figures 1 to 4 This embodiment is mainly used for the locking between the upper and lower housings of the pump. See details... Figure 3 First, a straight hole for installing the locking switch is made on the upper housing, and a locking nut is pre-embedded in the straight hole. A deep groove is made on the lower housing opposite the straight hole, and a locking hole is made on one side of the deep groove. The locking switch is installed into the straight hole, so that the outer shell of the locking switch is threadedly engaged with the locking nut.
[0029] In this embodiment, a lifting mechanism is also provided on the lower housing, the lifting body of which is a lifting spring; a limiting hole is provided at the bottom of the deep groove in the lower housing; the lifting spring is located in the limiting hole, and a spring cap is provided on its top, the spring cap is constrained in the limiting hole, and has the freedom to move up and down along the central axis of the limiting hole. Alternatively, a set screw can be provided below the limiting hole, penetrating into the limiting hole, with the spring cap and lifting spring fitted onto the set screw to prevent the spring and the top cap from moving left and right.
[0030] The top of the limiting hole is designed to be constricted, specifically as follows: Figure 2 As shown, only part of the cap can be exposed from the constriction, which prevents the spring and the cap from separating.
[0031] For details on the structure of the locking switch, please refer to [link / reference]. Figure 4 and Figure 1The locking switch includes a housing, a pressing block, and a locking tongue; the housing has a partition, which is divided into upper and lower layers, and the partition has a through hole in the middle for connecting the upper and lower layers; the pressing block is located in the upper layer and has the freedom to move up and down in the upper layer, and the locking tongue is located in the lower layer and has the freedom to move left and right in the lower layer.
[0032] The upper and lower layers are also equipped with a first spring and a second spring, respectively; the first spring is located between the pressing block and the partition, providing a restoring force for the pressing block; the second spring is located between the outer shell side wall and the locking tongue, ensuring that the locking tongue is in the lock hole when no external force is applied, so as to achieve the locking of the upper and lower shells.
[0033] The latch includes a latch for engaging with the keyhole and a beveled structure for engaging with the push block; the latch and the beveled structure are designed as a single unit to form a ring structure; a second bevel is provided on the inner side of the ring structure, and the presence of the second bevel causes the top of the ring structure to form a flared shape.
[0034] The bottom of the pressing block is provided with a first inclined surface, which faces away from the lock hole; the first inclined surface passes through the first spring and the partition in sequence and connects with the second inclined surface; the first inclined surface and the second inclined surface abut against each other and can slide relative to each other.
[0035] The outer casing is also provided with a vertical limiting groove, and a limiting block is provided on one side of the pressing block; the limiting block is located in the limiting groove and has the freedom to move up and down in the limiting groove; it is used to prevent the pressing block from detaching from the outer casing under the action of the first spring.
[0036] In this embodiment, the following features also exist: Feature 1, the top protruding edge of the locking switch housing rests on the edge of the mounting hole in the upper housing; Feature 2, the height at which the pressing block is triggered for unlocking is lower than the height of the top edge of the upper housing. The former allows for further connection between the locking switch and the upper housing through the engagement of the upper locking nut and the housing. The latter ensures that the upper housing can only be lifted when the pressing block is pressed below the height of the top edge of the upper housing, preventing accidental activation.
[0037] The working principle of this embodiment is as follows:
[0038] When the upper and lower housings are locked, the latch is located in the lock hole, the first and second springs are in normal condition, and the first and second inclined surfaces are only partially in contact; and at this time, the lifting spring is in a compressed state.
[0039] When unlocking is required, press the pressing block. The pressing block is pressed down, the first spring retracts, the first and second inclined planes slide relative to each other, the bolt retracts from the lock hole, the second spring retracts, and when the bolt is completely disengaged from the lock hole, the restoring force of the lifting spring lifts up the upper housing with the locking switch.
[0040] When locking is required, press the top cover plate. Once in place, the latch part of the locking tongue will insert into the lock hole under the restoring force of the second spring, and the pressing block will bounce back to achieve locking.
[0041] It should be noted that the above description is merely a preferred application example of this utility model and is not intended to limit the scope of protection of this utility model. All technical solutions employing equivalent substitutions or equivalent transformations are within the scope of protection of this utility model.
Claims
1. A peristaltic pump housing locking structure, comprising an upper housing and a lower housing of the pump, wherein the upper housing and the lower housing are connected by a locking switch; characterized in that, The lower housing is provided with a locking hole; the outer shell of the locking switch is installed on the upper housing of the pump, and the locking tongue of the locking switch corresponds to the locking hole; The locking switch includes a housing, a pressing block, and a locking tongue; both the pressing block and the locking tongue are located within the housing; wherein the pressing block is constrained within the housing and has the freedom to move up and down within the housing; the bottom of the pressing block is provided with a first inclined surface; The latch is constrained to the bottom of the housing and has the freedom to move laterally; the inner side of the latch is provided with a second inclined surface, and the first and second inclined surfaces are in close contact and can slide relative to each other; A lifting spring is provided between the lower housing and the outer shell of the locking switch.
2. The peristaltic pump housing locking structure according to claim 1, characterized in that, The lower housing is provided with a limiting hole; the lifting spring is located in the limiting hole, and its top is provided with a spring cap, which is constrained in the limiting hole and has the freedom to move up and down along the central axis of the limiting hole.
3. The peristaltic pump housing locking structure according to claim 1, characterized in that, The lower housing has a through hole, in which a set screw is threadedly connected; the lifting spring and the spring cap are both fitted onto the shank of the set screw, and both have the freedom to slide up and down on the shank of the set screw.
4. The peristaltic pump housing locking structure according to claim 1, characterized in that, When the upper and lower housings are locked, the latch is located in the lock hole of the lower housing, and the first and second inclined surfaces partially engage; when unlocked, the latch is located in the outer housing, and the first and second inclined surfaces fully engage.
5. A peristaltic pump housing locking structure according to claim 1, characterized in that, The latch includes a latch portion and a beveled structure portion, wherein the latch portion engages with the lock hole; the beveled structure portion and the latch portion are integrated into a design, and the beveled structure portion and the latch portion form a ring structure, with a second bevel located on the beveled structure portion and inside the ring structure.
6. The peristaltic pump housing locking structure according to claim 1, characterized in that, The locking switch also includes a second spring, which is located in the housing between the housing sidewall and the locking tongue.
7. A peristaltic pump housing locking structure according to claim 1, characterized in that, The locking switch also includes a first spring; the housing is provided with a partition, which is divided into upper and lower layers, and the partition has a through hole in the middle for connecting the upper and lower layers; the pressing block is located in the upper layer and the locking tongue is located in the lower layer; the first spring is located between the partition and the pressing block; the first inclined surface of the pressing block passes through the through hole and cooperates with the second inclined surface.
8. A peristaltic pump housing locking structure according to claim 1, characterized in that, The outer shell is provided with a vertical limiting groove, and a limiting block is provided on one side of the pressing block; the limiting block is located in the limiting groove and has the freedom to move up and down in the limiting groove.
9. A peristaltic pump housing locking structure according to claim 1, characterized in that, A locking nut is pre-embedded in the mounting hole of the upper housing; the locking switch is located in the mounting hole, and its outer shell is provided with external threads, which cooperate with the locking nut; the top protrusion of the locking switch outer shell rests on the edge of the mounting hole of the upper housing.
10. A peristaltic pump housing locking structure according to claim 1, characterized in that, The height at which the pressing block is triggered to unlock is lower than the height of the top edge of the upper housing.