CN217632861U

CN217632861U - Low-noise self-adaptive elastic pump head with motion guide function

Info

Publication number: CN217632861U
Application number: CN202221186768.9U
Authority: CN
Inventors: 王鹏
Original assignee: Sichuan Tianfu Hunter Life Technology Co ltd
Current assignee: Sichuan Tianfu Hunter Life Technology Co ltd
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2022-10-21
Anticipated expiration: 2032-05-17

Abstract

The utility model discloses a low-noise self-adaptive elastic pump head with motion guide, which relates to the technical field of peristaltic pumps and specifically comprises a lower cover and a sliding component, wherein the lower cover can be arranged in a pump shell and can rotate in the pump shell; the sliding assembly comprises a roller, a sliding block body and a reset device, the roller is rotatably arranged on the sliding block body, and the reset device connects the sliding block body with the lower cover; the roller is matched with the inner wall of the pump shell to extrude the hose, and the reset device provides reset force for the roller; the utility model discloses, realize the position control of gyro wheel through resetting means to adapt to the hose of multiple different wall thicknesses, and fatigue life is longer, and partial spare part injection moulding, manufacturing cost is lower, and the reliability is high.

Description

Low-noise self-adaptive elastic pump head with motion guide function

Technical Field

The utility model relates to a technical field of peristaltic pump, concretely relates to low noise self-adaptation elasticity pump head of area motion direction.

Background

In the industries of blood collection, blood transfusion, precision chemical engineering and the like, a peristaltic pump is often used for preventing blood from being polluted, the general structure of the peristaltic pump is shown in figure 7, and the peristaltic pump mainly comprises a pump shell, rollers and guide wheels; the roller and the guide wheel are assembled on the pump head, the two roller and the two guide wheels are assembled on the pump head and can rotate, and the pump head can rotate clockwise or anticlockwise around a central point; a small amount of clearance is reserved between the roller and the inner wall of the pump shell, and the hose can be clamped between the pump shell and the roller; because of the small amount of clearance and the fact that the hose is a compressible, resilient hose, the hose is sealed at the "pressure point" of the pump housing and rollers; a larger gap is formed between the guide wheel and the pump shell, and the guide wheel only plays a role in guiding; when the pump head rotates around the central point, the pump head drives the roller to alternately extrude and release the elastic hose, so that liquid is pumped; because the liquid is conveyed through the hose, the contact with other parts is avoided, and the pollution of the liquid is also avoided, the liquid conveying device is widely applied to the blood collection and transfusion industry.

Because the peristaltic pump conveys liquid by alternately squeezing and releasing the hose, the clearance between the roller and the pump shell is certain in the operation process, and the hose must reach a closed state at a pressure point position in the squeezing process; in practical situations, however, due to process reasons, the wall thickness of the produced hose has a certain error range, and if the wall thickness of the hose is too thin, a closed state cannot be achieved at a 'pressure point' position; if the wall thickness of the hose is too thick, too large pressure at the pressure point position can add too large load to the motor; therefore, the rollers on the market have certain self-adjusting capacity according to the wall thickness of the hose in order to adapt to the working conditions, and are realized by adopting soft rubber at present; but the fatigue life of the roller made of soft rubber is short, and the fatigue life is difficult to control; the rolling wheels can be degummed, played, fallen, plastically deformed and the like in the service life, so that the working tightness of the rolling wheels is seriously influenced; and the existing pump heads are produced by adopting a machining mode, so that the cost is overhigh.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the peristaltic pump aims at the problems that the prior peristaltic pump adopts rollers made of rubber for hoses with different wall thicknesses, so that the fatigue life is short and is difficult to control; the rolling wheels can be degummed, played, fallen, plastically deformed and the like in the service life, so that the working tightness of the rolling wheels is seriously influenced; and present pump head all adopts machining's mode production, has the too high problem of cost, provides a low noise self-adaptation elasticity pump head of area motion direction, realizes the position control of gyro wheel through resetting means to the hose of multiple different wall thicknesses of adaptation, and fatigue life is longer, and some spare parts are through injection moulding, and manufacturing cost is lower, thereby has solved above-mentioned problem.

The technical scheme of the utility model as follows:

the utility model provides a low noise self-adaptation elasticity pump head of area motion direction specifically includes following structure:

a lower cap positionable within the pump housing, the lower cap being rotatable within the pump housing; preferably, the bottom of the lower cover is cylindrical so as to facilitate the rotation of the lower cover, and the diameter of the lower cover is slightly smaller than the inner diameter of the pump shell so as to ensure the normal rotation of the lower cover;

the sliding assembly comprises a roller, a sliding block body and a reset device, wherein the roller is rotatably arranged on the sliding block body, and the reset device connects the sliding block body with the lower cover; preferably, there are two of said sliding assemblies; in order to ensure the normal rotation of the lower cover, the outer edge of the slider body can be also arranged to be in a circular arc shape;

the idler wheel is matched with the inner wall of the pump shell to complete extrusion of the hose, and the reset device provides reset force for the idler wheel.

When the automatic closing device is used, when the lower cover rotates, the roller extrudes the hose, and in the reset range of the reset device, the slider body can adjust the movement stroke according to the wall thickness of the hose, so that the self-adaptive adjustment is realized, and the hose is ensured to be reliably closed at the pressure point positions of the pump shell and the roller all the time; preferably, the gyro wheel adopts hard material to make, can effectively avoid the gyro wheel to appear coming unstuck in life-span, play, the problem of falling the sediment.

Preferably, the lower cover is provided with a driving hole for inserting a driving rod in the pump shell; the lower cover is arranged in the pump shell, a driving rod in the pump shell is inserted into the driving hole, and the lower cover rotates under the driving of the driving rod; preferably, the driving rod is provided with a driving pin, and a driving groove for the driving pin to insert is formed in the driving hole, so that the lower cover can be normally driven by the driving rod to rotate; preferably, the driving hole is coaxial with the lower cover.

Preferably, the lower cover is provided with a first sliding groove for the sliding block body to slide, and the sliding block body is installed in the first sliding groove and can slide in the first sliding groove; preferably, the number of the first sliding chutes is two, the first sliding chutes are radially arranged on the lower cover and are positioned on two sides of the driving hole; and a sliding block body is arranged in each first sliding groove.

Preferably, the reset device is a reset spring, one end of the slider body is used for mounting the roller, and the other end of the slider body is provided with a buckle structure connected with the reset spring;

the lower cover is provided with an installation groove for placing a return spring, and one end of the installation groove is provided with a slot for inserting the buckle structure; one end of the reset spring is connected with the buckle structure of the sliding block body, preferably, the other end of the reset spring can be connected with the inner wall of the mounting groove or not, and the length of the reset spring is adjusted to enable the other end of the reset spring to be propped against the inner wall of the mounting groove; when the sliding block is used, the sliding block body is arranged in the first sliding groove, the return spring is arranged in the mounting groove, one end of the return spring is connected with the inner wall of the mounting groove, and the other end of the return spring is connected with the buckle structure; when the device is used, the lower cover is arranged in the pump shell to rotate, and the roller is extruded with the hose; due to the process, the wall thickness of the hose has an error within a certain range, when the wall thickness of the hose is thin, the extrusion force is small, the force counteracting the return spring is small, the compression amount of the return spring is small, and the stroke amount of the sliding assembly is small; when the wall thickness of the hose is thick, the extrusion force is large, the force counteracting the return spring is also large, the compression amount of the return spring is large, and the stroke amount of the sliding assembly is large; thereby realizing the self-adaptive adjustment of different pipe wall thicknesses.

Preferably, one end of the slider body is provided with a cavity for mounting a roller, and the roller is mounted in the cavity through a pin shaft; preferably, the pin shaft is vertically arranged, and the roller can rotate in the direction opposite to the rotating direction of the lower cover.

Preferably, a guide rod is arranged on the slider body, and a guide groove matched with the guide rod is arranged on the lower cover; preferably, the number of the guide rods is two, the two guide rods are respectively arranged at the front end and the rear end of the sliding block body to ensure the stability of the sliding block body as much as possible, and the guide rods and the sliding block body are connected into a whole through an injection molding process; when the sliding assembly is used, when the lower cover is placed in the pump shell, the guide rod falls into the guide groove, and the guide function of the guide rod prevents the sliding assembly from generating redundant friction and noise due to unstable movement; preferably, the guide groove is formed on the lower cover and is positioned at two ends of the mounting groove; during assembly, the sliding assembly is clamped into the mounting groove after being compressed by the reset spring of the sliding assembly, and meanwhile, the guide rod just falls into the guide groove of the lower cover, so that the sliding assembly and the lower cover are assembled.

Preferably, a guide block is arranged on the lower cover, and a guide arc surface is arranged on the guide block; when the lower cover is arranged in the pump shell, the clearance between the guide arc surface and the inner wall of the pump shell is more than or equal to the outer diameter of the hose; the guide block has a guide function on the hose and limits the moving direction of the hose; preferably, the number of the guide blocks is two, the guide blocks are radially arranged on the lower cover and are positioned at two ends of the driving hole; the guide block and the sliding assembly are arranged in a cross shape.

Preferably, the lower cover is also sequentially connected with a middle cover and an upper cover; the middle cover is provided with a guide part which is convenient for the hose to slide into the space between the lower cover and the inner wall of the pump shell; preferably, the specific structure of the guiding portion is shown in the figure, and the specific principle thereof, which should be known by those skilled in the art, is not described herein again;

the lower cover, the middle cover and the upper cover are connected through bolts; preferably, a nut is arranged in the upper cover through hot melting; the bolts sequentially penetrate through the lower cover, the middle cover and the upper cover from the lower part of the lower cover and are finally screwed into the nuts to complete the connection of the lower cover, the middle cover and the upper cover, and preferably, the number of the bolts is four.

Preferably, the lower cover, the middle cover, the upper cover and the slider body are processed by adopting an injection molding process; and all adopt the plastic material to make, all adopt the plastic to open the module and replace adding the piece now, greatly reduce its manufacturing cost.

Preferably, a second sliding groove opposite to the first sliding groove is formed in the middle cover, a sliding space is formed by the first sliding groove and the second sliding groove, and the sliding block body can slide in the sliding space; in the sliding process, the guide rod, the first sliding groove and the second sliding groove play a role in guiding at the same time, so that the sliding assembly is prevented from being unstable in movement and generating redundant friction and noise.

Compared with the prior art, the beneficial effects of the utility model are that:

1. a low-noise self-adaptive elastic pump head with a motion guide function comprises a lower cover which can be arranged in a pump shell, and the lower cover can rotate in the pump shell; the sliding assembly comprises a roller, a sliding block body and a reset device, wherein the roller is rotatably arranged on the sliding block body, and the reset device connects the sliding block body with the lower cover; the roller is matched with the inner wall of the pump shell to complete extrusion of the hose, and the reset device provides reset force for the roller; realize the position control of gyro wheel through resetting means to adapt to the hose of multiple different wall thicknesses, and fatigue life is longer, and partial spare part is through injection moulding, and manufacturing cost is lower, and the reliability is high, has characteristics such as stronger adaptability, noise low, with low costs moreover.

Drawings

FIG. 1 is an exploded view of a low noise adaptive elastic pump head with motion guidance;

FIG. 2 is a schematic diagram of a low-noise adaptive elastic pump head with a motion guide, with a middle cover and an upper cover removed;

FIG. 3 is a schematic diagram of a lower cover of a low-noise adaptive elastic pump head with motion guide;

FIG. 4 is a schematic diagram of a structure of a middle cover in a low-noise adaptive elastic pump head with motion guide;

FIG. 5 is a schematic structural diagram of a slider body in a low-noise adaptive elastic pump head with motion guidance;

FIG. 6 is a schematic diagram of a low-noise adaptive elastic pump head with motion guide in an operating state;

fig. 7 is a schematic structural view of a conventional peristaltic pump.

Reference numerals are as follows: 1-a pump shell, 2-a hose, 3-a roller, 5-a guide wheel, 6-a lower cover, 7-a slider body, 8-a return spring, 9-a driving hole, 11-a first sliding groove, 12-a buckling structure, 13-a mounting groove, 14-a groove, 15-a cavity, 16-a guide rod, 17-a guide groove, 18-a guide block, 19-a guide arc surface, 20-a middle cover, 21-an upper cover, 22-a guide part and 23-a second sliding groove.

Detailed Description

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention will be described in further detail with reference to the following examples.

Example one

The peristaltic pump conveys liquid by alternately squeezing and releasing the hose 2, while in the operation process, the clearance between the roller 3 and the pump shell 1 is certain, and the hose 2 must reach a closed state at a 'pressure point' position in the squeezing process; however, in practical situations, due to process reasons, the wall thickness of the produced hose 2 has a certain error range, and if the wall thickness of the hose 2 is too thin, a closed state cannot be achieved at a 'pressure point' position; if the wall thickness of the hose 2 is too thick, too much load is added to the motor due to too much pressure at the pressure point; therefore, the rollers 3 on the market have certain self-adjusting capacity according to the wall thickness of the hose 2 in order to adapt to the working conditions, and are realized by adopting soft rubber at present; however, the fatigue life of the roller 3 made of soft rubber is short, and the fatigue life is difficult to control; the roller 3 is degummed in the service life, and the working tightness is seriously influenced by the conditions of bottom, slag falling, plastic deformation and the like; and the existing pump heads are produced by adopting a machining mode, so that the cost is overhigh.

To the above problem, the present embodiment provides a low noise self-adaptation elasticity pump head of area motion direction, and it realizes the position control of gyro wheel 3 through resetting means to the hose 2 that adapts to multiple different wall thicknesses, and fatigue life is longer, and some spare parts are through injection moulding, and manufacturing cost is lower.

Referring to fig. 1-6, a low-noise adaptive elastic pump head with motion guide specifically includes the following structure:

a lower cover 6 which can be arranged in the pump shell 1, wherein the lower cover 6 can rotate in the pump shell 1; preferably, the bottom of the lower cover 6 is cylindrical to facilitate the rotation of the lower cover, and the diameter of the lower cover 6 is slightly smaller than the inner diameter of the pump shell 1 to ensure the normal rotation of the lower cover;

the sliding assembly comprises a roller 3, a sliding block body 7 and a reset device, wherein the roller 3 is rotatably arranged on the sliding block body 7, and the reset device connects the sliding block body 7 with the lower cover 6; preferably, there are two of said sliding assemblies; in order to ensure the normal rotation of the lower cover 6, the outer edge of the slider body 7 can also be set to be arc-shaped;

the idler wheel 3 is matched with the inner wall of the pump shell 1 to complete extrusion of the hose 2, and the reset device provides reset force for the idler wheel 3.

When the device is used, when the lower cover 6 rotates, the roller 3 extrudes the hose 2, and in the reset range of the reset device, the slide block body 7 can adjust the motion stroke according to the wall thickness of the hose 2, so that self-adaptive adjustment is realized, and the hose 2 is ensured to be reliably sealed at the pressure point positions of the pump shell 1 and the roller 3 all the time; preferably, gyro wheel 3 adopts hard material to make, can effectively avoid gyro wheel 3 to appear coming unstuck in life-span, play, the problem of falling the sediment.

In the present embodiment, specifically, the lower cover 6 is provided with a driving hole 9 for inserting the driving rod in the pump casing 1; the lower cover 6 is arranged in the pump shell 1, a driving rod in the pump shell 1 is inserted into the driving hole 9, and the lower cover 6 is driven by the driving rod to rotate; preferably, the driving rod is provided with a driving pin, and the driving hole 9 is provided with a driving slot into which the driving pin is inserted, so as to ensure that the lower cover 6 can be normally driven by the driving rod to rotate; preferably, said driving hole 9 is coaxial with the lower cover 6.

In this embodiment, specifically, the lower cover 6 is provided with a first sliding chute 11 for the sliding of the slider body 7, and the slider body 7 is installed in the first sliding chute 11 and can slide in the first sliding chute 11; preferably, the number of the first sliding grooves 11 is two, and the first sliding grooves are radially arranged on the lower cover 6 and located on two sides of the driving hole 9; and the first sliding grooves 11 are internally provided with sliding block bodies 7.

In this embodiment, specifically, the reset device is a reset spring 8, one end of the slider body 7 is used for mounting the roller 3, and the other end of the slider body 7 is provided with a buckle structure 12 connected with the reset spring 8;

an installation groove 13 for placing the return spring 8 is formed in the lower cover 6, and a slot 14 for inserting the buckle structure 12 is formed in one end of the installation groove 13; one end of the return spring 8 is connected with the buckle structure 12 of the slider body 7, preferably, the other end of the return spring 8 can be connected with the inner wall of the mounting groove 13 or can not be connected, and the length of the return spring 8 is adjusted to enable the other end of the return spring to be propped against the inner wall of the mounting groove 13; when the slide block is used, the slide block body 7 is arranged in the first sliding groove 11, the return spring 8 is arranged in the mounting groove 13, one end of the return spring is connected with the inner wall of the mounting groove 13, and the other end of the return spring is connected with the buckle structure 12; when in use, the lower cover 6 is arranged in the pump shell 1 to rotate, and the roller 3 is extruded with the hose 2; due to process reasons, the wall thickness of the hose 2 has errors within a certain range, when the wall thickness of the hose 2 is thinner, the extrusion force is smaller, the force counteracting the return spring 8 is also smaller, the compression amount of the return spring 8 is small, and the stroke amount of the sliding assembly is small; when the wall thickness of the hose 2 is thick, the extrusion force is large, the force reacting on the return spring 8 is also large, the compression amount of the return spring 8 is large, and the stroke amount of the sliding assembly is large; thereby realizing the self-adaptive adjustment of different pipe wall thicknesses.

In this embodiment, specifically, a cavity 15 for installing the roller 3 is provided at one end of the slider body 7, and the roller 3 is installed in the cavity 15 through a pin; preferably, the pin is vertically arranged, and the roller 3 can rotate in the direction opposite to the rotating direction of the lower cover 6.

Example two

Second embodiment is a further description of the first embodiment, the same components are not repeated herein, please refer to fig. 1-6, a guide rod 16 is arranged on the slider body 7, and a guide groove 17 matched with the guide rod 16 is arranged on the lower cover 6; preferably, the number of the guide rods 16 is two, the guide rods 16 are respectively arranged at the front end and the rear end of the slider body 7, the stability of the slider body 7 is ensured as much as possible, and the guide rods 16 and the slider body 7 are connected into a whole through an injection molding process; when the lower cover 6 is placed in the pump shell 1 in use, the guide rod 16 falls into the guide groove 17, and the guide function of the guide rod prevents the unstable movement of the sliding assembly and generates redundant friction and noise; preferably, the guide groove 17 is formed on the lower cover 6 and is positioned at two ends of the mounting groove 13; during assembly, the sliding assembly is clamped into the mounting groove 13 after the return spring 8 of the sliding assembly is compressed, and meanwhile, the guide rod 16 just falls into the guide groove 17 of the lower cover 6, so that the sliding assembly is assembled with the lower cover 6.

In this embodiment, specifically, a guide block 18 is disposed on the lower cover 6, and a guide arc surface 19 is disposed on the guide block 18; when the lower cover 6 is arranged in the pump shell 1, the clearance between the guide cambered surface 19 and the inner wall of the pump shell 1 is more than or equal to the outer diameter of the hose 2; the guide block 18 has a guiding function on the hose 2 and limits the moving direction of the hose 2; preferably, the guide blocks 18 are two in number, are radially arranged on the lower cover 6 and are positioned at two ends of the driving hole 9; the guide block 18 and the sliding assembly are arranged in a cross.

In this embodiment, specifically, the lower cover 6 is further connected with a middle cover 20 and an upper cover 21 in sequence; the middle cover 20 is provided with a guide part 22 which is convenient for the hose 2 to slide between the lower cover 6 and the inner wall of the pump shell 1; preferably, the specific structure of the guiding portion 22 is shown in fig. 4, and the specific principle thereof, which should be known to those skilled in the art, is not described herein again;

the lower cover 6, the middle cover 20 and the upper cover 21 are connected through bolts; preferably, a nut is arranged in the upper cover 21 through hot melting; the bolts pass through the lower cover 6, the middle cover 20 and the upper cover 21 in sequence from the lower part of the lower cover 6 and are finally screwed into the nuts to complete the connection of the lower cover 6, the middle cover 20 and the upper cover 21, and preferably, the number of the bolts is four.

In this embodiment, specifically, the lower cover 6, the middle cover 20, the upper cover 21 and the slider body 7 are all processed by an injection molding process; and all adopt the plastic material to make, all adopt the plastic to open the module and replace adding the piece now, greatly reduce its manufacturing cost.

In this embodiment, specifically, the middle cover 20 is provided with a second sliding chute 23 opposite to the first sliding chute 11, the first sliding chute 11 and the second sliding chute 23 form a sliding space, and the slider body 7 can slide in the sliding space; during the sliding process, the guide rod 16, the first sliding chute 11 and the second sliding chute 23 play a role of guiding at the same time, so that the movement of the sliding assembly is prevented from being unstable, and redundant friction and noise are generated.

The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which all belong to the protection scope of the present application.

Claims

1. A low noise adaptive elastic pump head with motion guidance, comprising:

the lower cover (6) can be arranged in the pump shell (1), and the lower cover (6) can rotate in the pump shell (1);

the sliding assembly comprises a roller (3), a sliding block body (7) and a resetting device, wherein the roller (3) is rotatably arranged on the sliding block body (7), and the resetting device connects the sliding block body (7) with the lower cover (6);

the extrusion to hose (2) is accomplished in gyro wheel (3) and pump case (1) inner wall cooperation, resetting means provides reset force for gyro wheel (3).

2. A motion guided, low noise, adaptive elastic pump head as claimed in claim 1, wherein the lower cover (6) is provided with a drive hole (9) for insertion of a drive rod in the pump housing (1); the lower cover (6) is arranged in the pump shell (1), a driving rod in the pump shell (1) is inserted into the driving hole (9), and the lower cover (6) rotates under the driving of the driving rod.

3. A low-noise adaptive elastic pump head with motion guide according to claim 2, wherein the lower cover (6) is provided with a first sliding groove (11) for the sliding block body (7) to slide, and the sliding block body (7) is installed in the first sliding groove (11) and can slide in the first sliding groove (11).

4. A low-noise adaptive elastic pump head with motion guide according to claim 3, wherein the return means is a return spring (8), one end of the slider body (7) is used for mounting the roller (3), and the other end of the slider body (7) is provided with a snap structure (12) connected with the return spring (8);

an installation groove (13) for placing a return spring (8) is formed in the lower cover (6), and a groove (14) for inserting the buckle structure (12) is formed in one end of the installation groove (13); one end of the return spring (8) is connected with the buckle structure (12) of the sliding block body (7).

5. A low noise adaptive elastic pump head with motion guide according to claim 4, wherein one end of the slider body (7) is provided with a cavity (15) for mounting the roller (3), and the roller (3) is mounted in the cavity (15) by a pin.

6. A low noise adaptive elastic pump head with motion guide according to claim 5, wherein the slider body (7) is provided with a guide rod (16), and the lower cover (6) is provided with a guide groove (17) engaged with the guide rod (16).

7. A low-noise adaptive elastic pump head with motion guide according to claim 6, characterized in that a guide block (18) is placed on the lower cover (6), and a guide arc surface (19) is arranged on the guide block (18); when the lower cover (6) is arranged in the pump shell (1), the clearance between the guide arc surface (19) and the inner wall of the pump shell (1) is larger than or equal to the outer diameter of the hose (2).

8. A low noise adaptive elastic pump head with motion guide according to claim 7, characterized in that the lower cover (6) is further connected with a middle cover (20) and an upper cover (21) in sequence; the middle cover (20) is provided with a guide part (22) which is convenient for the hose (2) to slide into the space between the lower cover (6) and the inner wall of the pump shell (1);

the lower cover (6), the middle cover (20) and the upper cover (21) are connected through bolts;

the lower cover (6), the middle cover (20), the upper cover (21) and the slider body (7) are processed by adopting an injection molding process.

9. A low-noise adaptive elastic pump head with motion guide according to claim 8, wherein the middle cover (20) is provided with a second sliding groove (23) opposite to the first sliding groove (11), the first sliding groove (11) and the second sliding groove (23) form a sliding space, and the slider body (7) can slide in the sliding space.

10. A motion guided, low noise, adaptive elastic pump head as claimed in claim 9, wherein there are two of said sliding assemblies, radially disposed on the lower cover (6) and located on either side of the drive aperture (9);

the two guide blocks (18) are radially arranged on the lower cover (6) and are positioned at two ends of the driving hole (9).