CN217542489U

CN217542489U - Sampling needle assembly

Info

Publication number: CN217542489U
Application number: CN202221195781.0U
Authority: CN
Inventors: 卜亚洲; 肖春辉
Original assignee: Shenzhen Comen Medical Instruments Co Ltd
Current assignee: Shenzhen Comen Medical Instruments Co Ltd
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2022-10-04
Anticipated expiration: 2032-05-18

Abstract

The utility model provides a sampling needle assembly, which comprises a sampling needle, a supporting arm, a Z-direction driving module, a protective sleeve, a detection module and a support, wherein the detection module comprises a data line; one end of the data line is connected with the supporting arm, the other end of the data line sequentially penetrates through the sliding block and the protective sleeve and extends out of the support, one end of the protective sleeve is connected with the sliding block, and the other end of the protective sleeve is connected with the support, so that the protective sleeve is compressed or stretched along with the sliding block. The utility model discloses a set up the protective sheath between slider and support, protect the data line that is in between slider and support, prevent the data line winding and bend.

Description

Sampling needle assembly

Technical Field

The utility model belongs to the technical field of medical instrument and specifically relates to indicate a sampling needle subassembly.

Background

In the related art, the sampling needle assembly is provided with a board card for realizing the liquid level detection function on a sampling needle mounting arm, the board card is connected with a data line, and the data line passes through the center of a sliding shaft and reaches the bottom of the sampling needle assembly. When the sampling needle moves, the data wire is driven to rotate, and the exposed part of the data wire is easy to wind and bend along with the movement.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sampling needle subassembly solves above-mentioned technical problem to a certain extent at least.

The embodiment of the utility model provides a sampling needle assembly, including sampling needle, support arm, Z to drive module, protective sheath, detection module and support, detection module includes the data line, Z to drive module install in on the support, Z to drive module is provided with the slider, Z to drive module drive the slider along the motion of Z, support arm one end is passed the support and is connected with the slider, the support arm other end with the sampling needle is connected, detection module part install in on the support arm; wherein the content of the first and second substances,

one end of the data line is connected with the supporting arm, the other end of the data line sequentially penetrates through the sliding block and the protective sleeve and extends out of the support, one end of the protective sleeve is connected with the sliding block, and the other end of the protective sleeve is connected with the support, so that the protective sleeve is compressed or stretched along with the movement of the sliding block.

Further, keeping away from of support the support arm end is provided with first mount pad, the protective sheath includes pars contractilis and two connecting portion, the both ends of pars contractilis are connected respectively and are corresponded connecting portion, the pars contractilis cover is located data line week side, one connecting portion with the slider is connected, and another connecting portion with first mount pad is connected.

Furthermore, the protective sleeve is made of elastic materials.

Further, the protective sheath is extension spring.

Furthermore, the device also comprises a guide rod, one end of the guide rod is connected with the supporting arm, the other end of the guide rod is connected with the end, far away from the supporting arm, of the support, and the sliding block is sleeved on the guide rod;

the Z-direction driving module comprises an idler wheel structure and a first driving part, the first driving part and the idler wheel structure are both arranged on the support, the first driving part is connected with the idler wheel structure, and the sliding block is fixed on the idler wheel structure so as to enable the sliding block to move along with the idler wheel structure.

Further, the idler structure comprises an idler, a first synchronous belt and a pressing plate, the idler is mounted at the end, close to the supporting arm, of the support, the first driving piece is mounted at the end, close to the protective sleeve, of the support, the idler is connected with an output shaft of the first driving piece through the first synchronous belt, the sliding block is connected with the pressing plate, and the first synchronous belt is clamped between the pressing plate and the sliding block.

Further, still include swing drive module, swing drive module includes sliding shaft, swing structure and second driving piece, swing structure install in keeping away from of support the protective sheath end, just swing structure set up in the guide bar with between the support arm, sliding shaft one end with the support arm is connected, the sliding shaft other end passes swing structure with the slider is connected, the second driving piece install in keeping away from of support the protective sheath end, just the second driving piece with swing structure connects.

Further, the swing structure includes second hold-in range, drive wheel, synchronizing wheel and second mount pad, the support arm install in on the synchronizing wheel, the synchronizing wheel install in on the second mount pad, the second mount pad the second driving piece install in on the support, the second mount pad set up in the guide bar with between the support arm, the drive wheel with the output shaft of second driving piece, the drive wheel with the synchronizing wheel passes through the second hold-in range is connected, so that the drive wheel with synchronizing wheel synchronous rotation.

Further, the slider includes interior slider and outer slider, outer slider is fixed in the idler is structural, interior slider install in the outer slider, the sliding shaft with interior slider is connected, protective sheath one end with interior slider is connected, just the protective sheath other end with the leg joint.

Further, the detection module still includes the PCBA integrated circuit board, the PCBA integrated circuit board set up in on the support arm, data line one end with the PCBA integrated circuit board is connected, the data line other end passes in proper order the sliding shaft with the protective sheath, and follow the support stretches out.

The embodiment of the utility model provides a beneficial effect lies in: the embodiment of the utility model provides a sampling needle assembly, including sampling needle, support arm, Z to drive module, protective sheath, detection module and support, detection module includes the data line, Z to drive module install in on the support, Z to drive module is provided with the slider, Z to drive module drive the slider along the motion of Z, support arm one end is passed the support and is connected with the slider, the support arm other end with the sampling needle is connected, detection module part install in on the support arm; one end of the data line is connected with the supporting arm, the other end of the data line sequentially penetrates through the sliding block and the protective sleeve and extends out of the support, one end of the protective sleeve is connected with the sliding block, and the other end of the protective sleeve is connected with the support, so that the protective sleeve is compressed or stretched along with the movement of the sliding block. The utility model protects the data line between the sliding block and the bracket by arranging the protective sleeve between the sliding block and the bracket, and ensures that the protective sleeve is driven by the sliding block to stretch when the data line moves upwards; when the data wire moves downwards, the protective sleeve is compressed, and in the process that the protective sleeve is stretched and compressed, the periphery of the data wire is always protected to prevent the data wire from being wound and bent. Meanwhile, the protective sleeve can be stretched and compressed, so that excessive movement stroke is not occupied, the overall height of the sampling needle assembly is reduced, and less space of equipment is occupied.

Drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural view of a sampling needle assembly provided in an embodiment of the present invention;

fig. 2 is a partial exploded view of a sampling needle assembly provided in accordance with an embodiment of the present invention;

FIG. 3 is a first partial block diagram of a sampling needle assembly according to an embodiment of the present invention;

fig. 4 is a second partial block diagram of a sampling needle assembly according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention, and all other embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 to 4, an embodiment of the present invention provides a sampling needle assembly, including a sampling needle 1, a supporting arm 2, a Z-direction driving module 3, a protecting sleeve 4, a detecting module 5 and a bracket 6, wherein the detecting module 5 includes a data line 51, the Z-direction driving module 3 is installed on the bracket 6, the Z-direction driving module 3 is provided with a slider 7,Z for driving a slider 7 to move along the Z-direction toward the driving module 3, one end of the supporting arm 2 passes through the bracket 6 to be connected with the slider 7, the other end of the supporting arm 2 is connected with the sampling needle 1, and the detecting module 5 is partially installed on the supporting arm 2; wherein, data line 51 one end is connected with support arm 2, and the data line 51 other end passes slider 7 and protective sheath 4 in proper order to stretch out to the support 6 outside, protective sheath 4 one end is connected with slider 7, and the protective sheath 4 other end is connected with support 6, so that protective sheath 4 is compressed or is tensile along with the motion of slider 7.

In this embodiment, when the sampling needle 1 moves in the Z direction (as shown in fig. 1), the data line 51 is driven to move up and down along the Z direction; the protective sleeve 4 is arranged between the slider 7 and the bracket 6, so that the data line 51 between the slider 7 and the bracket 6 is protected, and the protective sleeve 4 is driven by the slider 7 to be stretched when the data line 51 moves upwards; when the data wire 51 moves downward, the protective cover 4 is compressed, and the outer periphery of the data wire 51 is always protected to prevent the data wire 51 from being wound and bent during the process of stretching and compressing the protective cover 4. Meanwhile, the protective sleeve 4 can be stretched and compressed, so that excessive movement stroke is not occupied, the overall height of the sampling needle assembly is reduced, and less space of equipment is occupied.

Further, referring to fig. 2, a first mounting seat 61 is disposed at an end of the bracket 6 away from the supporting arm 2, the protective sleeve 4 includes a telescopic portion 41 and two connecting portions, two ends of the telescopic portion 41 are respectively connected to the corresponding connecting portions, the telescopic portion 41 is sleeved on the periphery of the data line 51, one connecting portion is connected to the slider 7, and the other connecting portion is connected to the first mounting seat 61.

In this embodiment, the protective sheath 4 comprises a telescopic portion 41 and connecting portions, wherein the connecting portions are located at two ends of the telescopic portion 41, and the two connecting portions are respectively connected to the first mounting seat 61 and the slider 7, so that the telescopic portion 41 is fixed between the first mounting seat 61 and the slider 7, and the telescopic portion 41 is prevented from being dislocated; the expansion portion 41 is provided around the data line 51 to protect the data line 51. Specifically, the expansion part 41 can be pulled by the slider 7 when the data line 51 moves upward; when the data wire 51 moves downwards, the expansion part 41 is compressed, and the periphery of the data wire 51 can be always protected no matter the expansion part 41 is in the process of stretching or compressing, so that the data wire 51 is prevented from being wound and bent. Meanwhile, the telescopic part 41 has the stretching and compressing characteristics, so that excessive movement stroke is not occupied, the overall height of the sampling needle assembly is reduced, and less space of equipment is occupied.

Further, the protective sleeve 4 is made of an elastic material.

In this embodiment, in order to ensure that the protective sleeve 4 has better stretching and compressing effects, the protective sleeve 4 is made of an elastic material; that is, no matter the protective sheath 4 is stretched or compressed, the elastic material can be used for providing a certain elastic force to play a role in buffering or supporting, so that deformation or ineffective stretching or compression caused by excessive stress is avoided, and the data wire 51 can be better protected on the periphery of the data wire 51 along with the movement of the data wire 51 all the time, thereby preventing the data wire 51 from being wound and bent.

Further, the protective sleeve 4 is a tension spring.

In this embodiment, the protective sleeve 4 is a spring, preferably a tension spring. Specifically, two ends of the tension spring can be fixed to other components (i.e., the first mounting seat 61 and the slider 7), and the tension spring is a coil spring capable of bearing axial tension, so that no matter when the first mounting seat 61 and the slider 7 move in opposite directions or in opposite directions, the tension spring can elastically deform along with the tension or compression and enable the data line 51 to only move inside the tension spring, and cannot be bent or wound together. And the tension spring is a telescopic body, so that the excessive motion stroke can be avoided, the overall height of the sampling needle assembly is reduced, and the space of the device is less occupied.

Further, please refer to fig. 1 to 3, further comprising a guide rod 8, wherein one end of the guide rod 8 is connected to the support arm 2, the other end of the guide rod 8 is connected to the end of the support 6 away from the support arm 2, and the slide block 7 is sleeved on the guide rod 8; the Z-direction driving module 3 includes an idler structure 31 and a first driving member 32, the first driving member 32 and the idler structure 31 are both mounted on the bracket 6, the first driving member 32 is connected to the idler structure 31, and the sliding block 7 is fixed on the idler structure 31, so that the sliding block 7 moves along with the idler structure 31.

In this embodiment, the bracket 6 includes a supporting plate 62, a first mounting plate 63 and a second mounting plate 64, the first mounting plate 63 and the second mounting plate 64 are oppositely disposed at two ends of the supporting plate 62, the first driving member 32 is mounted at an end of the supporting plate 62 close to the second mounting plate 64, one end of the guide rod 8 is connected to the second mounting plate 64, and the other end of the guide rod 8 passes through the first mounting plate 63 and is connected to the supporting arm 2; since the sliding block 7 is fixed on the idle wheel structure 31, when the idle wheel structure 31 is driven by the first driving member 32, the sliding block 7 can be driven to move and move up and down along the guide rod 8; when the first driving member 32 drives the idle wheel structure 31 to move, the sliding block 7 is driven to move up and down, and the data line 51 passes through the sliding block 7 and is fixed on the supporting arm 2, so that the data line 51 also moves up and down along with the movement of the sliding block 7. However, since the data line 51 is flexible and thin, and is easily bent or wound during the vertical movement to cause a failure, one end of the protective sheath 4 is fixed on the slider 7, and the other end is fixed on the first mounting seat 61, so that the protective sheath can be ensured to be always sleeved outside the data line 51, and can extend and retract along with the vertical movement of the data line 51, thereby ensuring that the data line 51 is not bent.

It should be noted that the first driving element 32 in this embodiment may be another driving element such as an electric motor, an air cylinder, or a hydraulic driving element, and the type thereof is not limited herein as long as the driving can be realized.

Further, referring to fig. 1 to 3, the idler structure 31 includes an idler 311, a first synchronous belt 312 and a pressing plate 313, the idler 311 is installed at the end of the bracket 6 close to the supporting arm 2, the first driving member 32 is installed at the end of the bracket 6 close to the protecting sleeve 4, the idler 311 is connected with an output shaft of the first driving member 32 through the first synchronous belt 312, the sliding block 7 is connected with the pressing plate 313, and the first synchronous belt 312 is sandwiched between the pressing plate 313 and the sliding block 7.

In this embodiment, the idler 311, the first synchronous belt 312 and the pressing plate 313 are integrally formed into the idler structure 31. Specifically, the idle pulley 311 is installed at the end of the bracket 6 close to the first installation plate 63, the first driving element 32 and the idle pulley 311 are in the same vertical plane, the idle pulley 311 is connected with the output shaft of the first driving element 32 through the first synchronous belt 312, and in order to ensure that the sliding block 7 can move along with the first synchronous belt 312, the sliding block 7 is fixed on the first synchronous belt 312 by the pressing plate 313. The first synchronous belt 312 is driven by the first driving member 32 to move, and then the slider 7 is driven to move up and down along the guide rod 8, so that the data line 51 can also move up and down, and the protective sleeve 4 is always sleeved on the outer side of the data line 51, so that the data line 51 cannot be bent during the up and down movement.

In this embodiment, in order to ensure that the height of the slide 7 moving is not too high or too low, which may cause the sampling needle 1 not to move accurately, the idle wheel 311 is located at the same level as the first mounting plate 63.

Further, please refer to fig. 1 to fig. 2, further including a swing driving module 9, wherein the swing driving module 9 includes a sliding shaft 91, a swing structure 92 and a second driving element 93, the swing structure 92 is installed at the end of the support 6 far away from the protection cover 4, the swing structure 92 is disposed between the guide bar 8 and the support arm 2, one end of the sliding shaft 91 is connected to the support arm 2, the other end of the sliding shaft 91 passes through the swing structure 92 to be connected to the slider 7, the second driving element 93 is installed at the end of the support 6 far away from the protection cover 4, and the second driving element 93 is connected to the swing structure 92.

In this embodiment, the second driving member 93 and the swing structure 92 are mounted on both sides of the

first mounting plate

63, and 2 guide rods 8 are provided on both sides of the sliding shaft 91; and the third mounting plate 65 on the support 6 is used for mounting the guide rod 8, at this time, a first bearing 94 is mounted between the second mounting plate 64 and the third mounting plate 65, because the slider 7 is sleeved on the guide rod 8, the slider 7 and the sliding shaft 91 are viewed as a whole at this time and can move up and down along the guide rod 8, and the support arm 2 has a fixed end and a moving end, the fixed end is mounted on the sliding shaft 91, and the sliding shaft 91 passes through the swinging structure 92 to be connected with the slider 7, so when the second driving member 93 drives the swinging structure 92 to swing, the guide rod 8 drives the sliding shaft 91 to swing along with the rotation so as to drive the moving end of the support arm 2 to swing, thereby realizing the horizontal rotation of the sampling needle 1.

It should be noted that the supporting arm 2 has a swing arm body 21, a swing arm shield 22 covering the swing arm body 21, and a fixing arm 23, where the swing arm shield 22 is used to protect the swing arm body 21, and the fixing arm 23 is connected to the sliding shaft 91, and is suspended above the swing arm shield 22, and is used to fix the sampling needle 1. The number of the guide rods 8 can be increased or decreased as required, and the positions of the guide rods 8 relative to the sliding shaft 91 can be adjusted as required, and are not limited herein, so long as the slide block 7 and the sliding shaft 91 can move up and down along the guide rods 8 and can also be driven by the guide rods 8 to rotate together. In addition, the second driving member 93 may be a motor, a cylinder, a hydraulic driving member, or other driving members, and the type thereof is not limited as long as driving can be achieved.

Further, please refer to fig. 1 to 2, the swing structure 92 includes a second synchronous belt 921, a driving wheel 922, a synchronous wheel 923 and a second mounting seat 924, the supporting arm 2 is mounted on the synchronous wheel 923, the synchronous wheel 923 is mounted on the second mounting seat 924, the second mounting seat 924 and the second driving member 93 are mounted on the bracket 6, the second mounting seat 924 is disposed between the guiding rod 8 and the supporting arm 2, the driving wheel 922 is connected to an output shaft of the second driving member 93, and the driving wheel 922 is connected to the synchronous wheel 923 through the second synchronous belt 921, so that the driving wheel 922 and the synchronous wheel 923 rotate synchronously.

In this embodiment, the second timing belt 921, the driving wheel 922, the timing wheel 923, and the second mounting base 924 form the swing structure 92 as a whole. Specifically, install drive wheel 922 on the output shaft of second driving piece 93, second mount pad 924 is installed on first mounting panel 63, synchronizing wheel 923 is installed on second mount pad 924, drive wheel 922 and synchronizing wheel 923 are in same horizontal plane, and be connected through second hold-in range 921 between drive wheel 922 and the synchronizing wheel 923, install support arm 2 on synchronizing wheel 923, guide bar 8 is installed on second mount pad 924, and have second bearing 95 between second mount pad 924 and the support 6, at this moment, sliding shaft 91 passes synchronizing wheel 923, second mount pad 924 in proper order, and is connected with slider 7. When second driving piece 93 drive wheel 922 rotates, because drive wheel 922 and synchronizing wheel 923 are connected to second hold-in range 921 for synchronizing wheel 923 synchronous rotation drives guide bar 8 and rotates, and along with the rotation of guide bar 8 drives slide shaft 91 and rotates the swing that is equipped with the support arm 2 of sampling needle 1 with this, thereby realizes the horizontal rotation of sampling needle 1.

Further, referring to fig. 2, the sliding block 7 includes an inner sliding block 71 and an outer sliding block 72, the outer sliding block 72 is fixed on the idle wheel structure 31, the inner sliding block 71 is installed in the outer sliding block 72, the sliding shaft 91 is connected with the inner sliding block 71, one end of the protection sleeve 4 is connected with the inner sliding block 71, and the other end of the protection sleeve 4 is connected with the bracket 6.

In this embodiment, the inner slider 71 and the outer slider 72 form the slider 7 as a whole, and since the inner slider 71 is installed in the outer slider 72 and the third bearing 73 is disposed between the inner slider 71 and the outer slider 72, the inner slider 71 can rotate in the outer slider 72, one end of the guide rod 8 is connected to the second mounting seat 924, and the other end of the guide rod 8 penetrates through the inner slider 71 to be connected to the third mounting plate 65, the slider 7 and the sliding shaft 91 can be regarded as a whole at this time, can move up and down along the guide rod 8, and can also be driven by the guide rod 8 to rotate together. When the second driving member 93 drives the swing structure 92 to swing, the guide rod 8 rotates to drive the inner slide block 71 to rotate, and the inner slide block 71 drives the sliding shaft 91 to rotate so as to drive the supporting arm 2 to swing, thereby realizing the horizontal rotation of the sampling needle 1.

Further, referring to fig. 1, the detection module 5 further includes a PCBA board 52, the PCBA board 52 is disposed on the support arm 2, one end of the data line 51 is connected to the PCBA board 52, and the other end of the data line 51 sequentially passes through the sliding shaft 91 and the protective cover 4 and extends out of the bracket 6.

In this embodiment, the PCBA board 52 is disposed on the fixing arm 23 to detect the liquid level, and the data line 51 sequentially passes through the sliding shaft 91 and the protective sheath 4 and extends out of the first mounting seat 61, so as to prevent the data line 51 from bending or winding due to the up-and-down movement.

To sum up, the sampling needle assembly provided by the utility model protects the data line between the slider and the bracket by arranging the protective sleeve between the slider and the bracket, and ensures that the protective sleeve is driven by the slider to stretch when the data line moves upwards; when the data wire moves downwards, the protective sleeve is compressed, and the periphery of the data wire is always protected to prevent the data wire from being wound and bent in the process that the protective sleeve is stretched and compressed. Meanwhile, the protective sleeve can be stretched and compressed, so that excessive movement stroke is not occupied, the overall height of the sampling needle assembly is reduced, and less space of equipment is occupied.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A sampling needle assembly is characterized by comprising a sampling needle, a supporting arm, a Z-direction driving module, a protective sleeve, a detection module and a support, wherein the detection module comprises a data line, the Z-direction driving module is installed on the support and is provided with a sliding block, the Z-direction driving module drives the sliding block to move along the Z direction, one end of the supporting arm penetrates through the support to be connected with the sliding block, the other end of the supporting arm is connected with the sampling needle, and the detection module is partially installed on the supporting arm; wherein, the first and the second end of the pipe are connected with each other,

2. The sampling needle assembly of claim 1, wherein the end of the support frame away from the support arm is provided with a first mounting seat, the protective sheath comprises a telescopic portion and two connecting portions, the two ends of the telescopic portion are respectively connected with the corresponding connecting portions, the telescopic portion is sleeved on the periphery of the data line, one connecting portion is connected with the sliding block, and the other connecting portion is connected with the first mounting seat.

3. The sampling needle assembly of claim 1, wherein the protective sheath is formed of an elastomeric material.

4. The sampling needle assembly of claim 1, wherein the protective sheath is a tension spring.

5. The sampling needle assembly of claim 1, further comprising a guide rod, wherein one end of the guide rod is connected with the support arm, the other end of the guide rod is connected with the end of the support frame far away from the support arm, and the slide block is sleeved on the guide rod;

6. The sampling needle assembly of claim 5, wherein the idler structure comprises an idler, a first timing belt, and a pressure plate, the idler is mounted to the end of the bracket near the support arm, the first driving member is mounted to the end of the bracket near the protective sheath, the idler is connected to an output shaft of the first driving member via the first timing belt, the slider is connected to the pressure plate, and the first timing belt is sandwiched between the pressure plate and the slider.

7. The sampling needle assembly of claim 5, further comprising an oscillating drive module, wherein the oscillating drive module comprises a sliding shaft, an oscillating structure, and a second driving member, the oscillating structure is mounted at the end of the bracket away from the sheath, the oscillating structure is disposed between the guide bar and the support arm, one end of the sliding shaft is connected with the support arm, the other end of the sliding shaft passes through the oscillating structure to be connected with the sliding block, the second driving member is mounted at the end of the bracket away from the sheath, and the second driving member is connected with the oscillating structure.

8. The sampling needle assembly of claim 7, wherein the oscillating structure comprises a second timing belt, a driving wheel, a timing wheel, and a second mounting seat, the supporting arm is mounted on the timing wheel, the timing wheel is mounted on the second mounting seat, the second mounting seat and the second driving member are mounted on the bracket, the second mounting seat is disposed between the guide rod and the supporting arm, the driving wheel is connected to an output shaft of the second driving member, and the driving wheel and the timing wheel are connected through the second timing belt, so that the driving wheel and the timing wheel rotate synchronously.

9. The sampling needle assembly of claim 7 wherein said slider comprises an inner slider and an outer slider, said outer slider being secured to said idler structure, said inner slider being mounted within said outer slider, said sliding shaft being connected to said inner slider, said protective sheath being connected at one end to said inner slider and at another end to said carrier.

10. The sampling needle assembly of claim 7, wherein the probe module further comprises a PCBA card disposed on the support arm, one end of the data cable being connected to the PCBA card, the other end of the data cable passing through the sliding shaft and the protective sheath in turn and protruding from the carrier.