Side surface position detection device

Abstract

The invention discloses a side face position detection device which comprises a shell, a testing head, a needle core and a sensing assembly. A side opening is formed in the side face of the upper end of the shell, a lower opening is formed in the lower end of the shell, and a hollow cavity connecting the side opening and the lower opening is formed in the middle of the shell. The testing head is limited and installed at the upper end side opening of the shell, and only part of the testing head can be exposed out of the shell under the limitation of the side opening; the needle core is installed in a hollow cavity of the shell, the upper end of the needle core or the testing head forms mutually-matched side pushing surfaces, a reset spring is installed between the needle core and the shell, and the lower end of the needle core is provided with a tail needle extending downwards; the sensing assembly is mounted at the lower end of the shell, extends out of the lower opening and is connected with an external detector; when the testing head is extruded towards the inside of the shell, the testing head enables the needle core to compress the reset spring through the lateral pushing face and drives the tail needle to move downwards, and a detection result is obtained according to whether the sensing assembly senses the tail needle or not. The working face is reduced, and the requirement for miniaturization of a test module is met.

Description

Technical Field

[0001] This invention relates to a detection device, and more particularly to a side position detection device. Background Technology

[0002] In the prior art, in order to detect the presence of the test object 100, the following methods are used: Figure 1 The detection device shown is used in the following way: When in use, the object 100 in the tested mechanism pushes the steel ball 200 in the detection device. The steel ball 200 compresses the slider 300 and the return spring 400, causing the contact 500 and the test needle 600 to close, thus confirming the presence of the object 100. If the object 100 is not present, the contact 500 disconnects from the test needle 600 under the action of the return spring 400, thus confirming the absence of the object 100. A closer analysis of this device reveals that because the contact 500 and the test needle 600 only have two states (closed and open), it cannot detect the specific location of the object A. Furthermore, the test needle 600 is perpendicular to the object 100. The linear arrangement of the steel ball 200, slider 300, contact 500, and test needle 600 forces the working plane to be placed horizontally, limiting the testing module, increasing the working area, and failing to meet the requirements for miniaturized testing modules. Summary of the Invention

[0003] The purpose of this invention is to provide a side position detection device to reduce the working surface and meet the needs of miniaturization of test modules.

[0004] Another objective of this invention is to provide a side position detection device that can not only detect and determine the presence of a measured object, but also detect the specific position of the measured object.

[0005] To achieve the above objectives, the solution of the present invention is:

[0006] A side position detection device includes a housing, a test head, a needle core, and a sensing component. The housing has a side opening at its upper end and a lower opening at its lower end, with a hollow cavity connecting the side opening and the lower opening in the middle. The test head is positioned at the upper side opening of the housing, and only partially protrudes from the housing due to the side opening. The needle core is installed within the hollow cavity of the housing, with at least one of its upper end and the test head forming a mating side-pushing surface. A return spring is installed between the needle core and the housing, and the lower end of the needle core has a downwardly extending tail needle. The sensing component is installed at the lower end of the housing and extends from the lower opening for connection to an external detector. When the test head is pressed into the housing, the test head compresses the return spring via the side-pushing surface, causing the tail needle to move downwards. The detection result is obtained by whether the sensing component senses the tail needle.

[0007] One approach is to detect and determine the presence of the analyte:

[0008] The tail needle is an elastic inner needle composed of an inner needle and an inner spring. The lower end of the needle core forms a movable groove, and the inner needle is slidably installed in the movable groove of the needle core. An inner spring is also installed in the movable groove, and the inner needle extends elastically downward under the action of the inner spring. The sensing component includes a probe, which is fixedly installed at the lower end of the housing and extends out from the lower opening for connection with an external detector. When the test head is pressed into the housing, the test head compresses the needle core and resets the spring through the side push surface, causing the inner needle to move downward. The detection result is obtained by whether the probe contacts the inner needle.

[0009] Furthermore, for ease of assembly, the sensing assembly also includes a sensing outer tube and an insulating sleeve. The upper end of the sensing outer tube is assembled to the lower end of the housing via a threaded connection. The probe is assembled in the sensing outer tube and fixed in the sensing outer tube by the insulating sleeve. The lower end of the probe extends out of the sensing outer tube.

[0010] Another approach is to detect whether the object being measured exists and to pinpoint its exact location.

[0011] The tail needle is a magnetic conductor; the sensing component includes a coil, which works with the moving magnetic conductor to generate inductance. The coil is connected to an external detector. When the test head is pressed into the housing, the test head compresses the return spring through the side push surface, causing the magnetic conductor to move downwards. As the magnetic conductor moves within the coil, the inductance of the coil changes. By measuring the change in the coil's inductance or resonant frequency with the detector, the specific position of the magnetic conductor can be obtained, thus determining the specific position of the object under test. Alternatively, the tail needle is a magnetic conductor; the sensing component includes a coil and a circuit board. The coil works with the moving magnetic conductor to generate inductance. The coil is connected to the circuit board, which is connected to an external detector. When the test head is pressed into the housing, the test head compresses the return spring through the side push surface, causing the magnetic conductor to move downwards. As the magnetic conductor moves within the coil, the inductance of the coil changes. By measuring the change in the coil's inductance or resonant frequency with the detector, the specific position of the magnetic conductor can be obtained, thus determining the specific position of the object under test.

[0012] Furthermore, for ease of assembly, the sensing assembly also includes a sensing outer tube and an insulating sleeve. The upper end of the sensing outer tube is assembled to the lower end of the housing via a threaded connection. The coil is assembled in the sensing outer tube by means of a bushing and a tailstock, and the circuit board is fixed in the sensing outer tube by the insulating sleeve, with the circuit board extending out from the sensing outer tube.

[0013] Furthermore, a capacitor is soldered onto the circuit board, and the capacitor is connected in parallel with the two ends of the coil lead. The capacitor and the coil form an LC oscillator to eliminate the influence of the connection line between the detector and this device.

[0014] The upper end of the outer shell forms a horizontal groove, which is perpendicular to the hollow cavity. The side opening is located at one end of the horizontal groove, and the other end of the horizontal groove is open so that the test head can be inserted into the outer shell.

[0015] The upper end of the outer shell forms an inclined groove, which is set at an angle with the hollow cavity. The side opening is located at the upper inclined end of the inclined groove, and the lower inclined end of the inclined groove is open so that the test head can be inserted into the outer shell.

[0016] The side thrust surface can be formed on the upper end of the needle core or on the test head. For example, the test head is spherical. Alternatively, the test head is cylindrical, with both ends being conical surfaces; or one end of the cylinder is conical while the other end is spherical; or both ends of the cylinder are spherical. Another option is that the test head is square-prism-shaped, with both ends being beveled.

[0017] With the above solution, when the present invention is used, the test head is exposed from the side opening of the shell. The test head transmits the sensed force to the needle core through the side push surface. The test direction is changed by the mutual cooperation of the side push surfaces, so that the test can be performed from the side. The needle core is parallel to the test object, and the working plane is placed vertically close to the test object. This makes the size of the test module unrestricted and the working surface greatly reduced, which can meet the needs of miniaturization of the test module.

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments are briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an existing detection device;

[0021] Figure 2 This is a structural schematic diagram of Embodiment 1 of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0023] Figure 4 This is a structural schematic diagram of Embodiment 3 of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of Embodiment 4 of the present invention;

[0025] Figure 6 This is a structural schematic diagram of Embodiment 5 of the present invention;

[0026] Figure 7 This is a schematic diagram of the circuit board structure of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of Embodiment Six of the present invention;

[0028] Figure 9 This is a schematic diagram of the structure of Embodiment Seven of the present invention;

[0029] Figure 10 This is a schematic diagram of the structure of Embodiment 8 of the present invention;

[0030] Figure 11-12 These are a front view and a side view of a test head according to the present invention;

[0031] Figure 13-14 These are front and side views of another test head according to the present invention;

[0032] Figure 15-16 These are a front view and a side view of another test head according to the present invention;

[0033] Figure 17-18 These are a front view and a side view of another test head according to the present invention;

[0034] Figure 19 This is a usage illustration of Embodiment 5 of the present invention. Figure 1 ;

[0035] Figure 20 This is a usage illustration of Embodiment 5 of the present invention. Figure 2 ;

[0036] Figure 21 This is a usage illustration of Embodiment 5 of the present invention. Figure 3 .

[0037] Label Explanation

[0038] Test object 100, steel ball 200, slider 300, return spring 400, contact 500, test probe 600;

[0039] Outer shell 1, side opening 11, bottom opening 12, hollow cavity 13, horizontal slide 14, inclined slide 15;

[0040] Test head 2;

[0041] Needle core 3, inner spring 31, inner needle 32, movable groove 33, magnetic conductor 34;

[0042] 41. Probe, 42. Sensing outer tube, 43. Insulating sleeve, 44. Coil, 45. Circuit board, 46. Bushing, 47. Tailstock, 48. Capacitor.

[0043] Return spring 5. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0045] It should be noted that the terms front, back, inside, outside, top, bottom, left, right, first, second, third, etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the technical features indicated, unless otherwise explicitly defined.

[0046] like Figures 2 to 5 As shown, the present invention discloses a series of side position detection devices, including a housing 1, a test head 2, a needle core 3, and a sensing component.

[0047] The upper end of the outer shell 1 forms a side opening 11 on the side, the lower end of the outer shell 1 forms a lower opening 12, and the middle of the outer shell 1 forms a hollow cavity 13 connecting the side opening 11 and the lower opening 12.

[0048] The test head 2 is limited and installed at the upper side opening 11 of the housing 1, that is, the diameter of the side opening 11 is slightly smaller than the diameter of the test head 2, and the test head 2 is limited by the side opening 11 so that only part of it can be exposed outside the housing 1.

[0049] The needle core 3 is installed inside the hollow cavity 13 of the outer shell 1. The upper end of the needle core 3 or the test head 2 forms a mating side push surface. The function of this side push surface is to transfer the force acting on the test head 2 from the side of the outer shell 1 to the vertically arranged needle core 3, thereby changing the direction of the force. Specifically, the side push surface can be formed only on the needle core 3, only on the test head 2, or both on the needle core 3 and the test head 2. A return spring 5 is installed between the needle core 3 and the outer shell 1 (the return spring 5 can directly or indirectly abut against the outer shell 1) to allow the needle core 3 to return to its original position when no external force is applied. The lower end of the needle core 3 has a downwardly extending tail needle, which is specifically an elastic inner needle composed of an inner spring 31 and an inner needle 32. The lower end of the needle core 3 forms a movable groove 33. The inner needle 32 is slidably installed in the movable groove 33 of the needle core 3. The limiting installation between the inner needle 32 and the movable groove 33 can be achieved by the step on the inner needle 32 and the small diameter of the movable groove 33. An inner spring 31 is also installed in the movable groove 33. Under the action of the inner spring 31, the inner needle 32 extends downward elastically.

[0050] The sensing component is mounted at the lower end of the housing 1 and extends from the lower opening 12 for connection to an external detector (not shown). Specifically, the sensing component may include a probe 41, which is fixedly mounted at the lower end of the housing 1 and extends from the lower opening 12 for connection to an external detector. Furthermore, for ease of assembly, the sensing component also includes a sensing outer tube 42 and an insulating sleeve 43. The upper end of the sensing outer tube 42 is threadedly connected to the lower end of the housing 1. The probe 41 is assembled in the sensing outer tube 42 and fixed therein by the insulating sleeve 43, with the lower end of the probe 41 extending from the sensing outer tube 42. The lower end of the aforementioned return spring 5 can abut against the sensing outer tube 42 or the insulating sleeve 43, achieving indirect mounting of the return spring 5 to the housing 1.

[0051] During installation, the test head 2 is mounted at the side opening 11 of the housing 1. The needle core 3, inner spring 31, inner needle 32, return spring 5, and sensing outer tube 42 containing probe 41 and insulating sleeve 43 are sequentially mounted in the hollow cavity 13 of the housing 1. The sensing outer tube 42 is then threadedly connected to the lower end of the housing 1, thus completing the assembly and fixation. Because the test head 2 protrudes from the side opening 11 of the housing 1, the test head 2 transmits the sensing force to the needle core 3 through the side pushing surface, and changes the testing direction through the side pushing surface. This allows for testing from the side. The needle core 3 and probe 41 are parallel to the object under test 100. Therefore, the working plane is vertically placed and close to the object under test 100, which makes the size of the test module unrestricted and greatly reduces the working surface, meeting the needs of miniaturized test modules.

[0052] When in use, when the test head 2 touches the object 100 and is pressed into the outer shell 1 (radial movement), the test head 2 causes the needle core 3 to compress the return spring 5 through the side push surface and drives the inner needle 32 to move downward (axial movement). The side push surface changes the test direction, and the inner needle 32 contacts the probe 41, thus detecting and confirming the presence of the object 100.

[0053] like Figures 6 to 10 As shown, the present invention discloses another series of side position detection devices, including a housing 1, a test head 2, a needle core 3, and a sensing component.

[0054] The upper end of the outer shell 1 forms a side opening 11 on the side, the lower end of the outer shell 1 forms a lower opening 12, and the middle of the outer shell 1 forms a hollow cavity 13 connecting the side opening 11 and the lower opening 12.

[0055] The test head 2 is limited and installed at the upper side opening 11 of the housing 1, that is, the diameter of the side opening 11 is slightly smaller than the diameter of the test head 2, and the test head 2 is limited by the side opening 11 so that only part of it can be exposed outside the housing 1.

[0056] The needle core 3 is installed inside the hollow cavity 13 of the outer shell 1. The upper end of the needle core 3 or the test head 2 forms a mutually cooperating side push surface. The function of this side push surface is to transfer the force acting on the test head 2 from the side of the outer shell 1 to the vertically arranged needle core 3, thereby changing the direction of the force. Specifically, the side push surface can be formed only on the needle core 3, only on the test head 2, or both on the needle core 3 and the test head 2. A return spring 5 is installed between the needle core 3 and the outer shell 1 (the return spring 5 can directly or indirectly abut against the outer shell 1) to allow the needle core 3 to return to its original position when no external force is applied. The lower end of the needle core 3 has a downwardly extending tail needle, which can specifically be a magnetic material 34 (such as iron, nickel-iron alloy, manganese-zinc alloy, nickel-zinc alloy, ferrite, etc.).

[0057] The sensing component is mounted at the lower end of the housing 1 and extends from the lower opening 12 for connection to an external detector (not shown). Specifically, the sensing component includes a coil 44 and a circuit board 45. The coil 44 is used to generate inductance in conjunction with the moving magnetic conductor 34. The coil 44 is connected to the circuit board 45, which is connected to the external detector. Furthermore, for ease of assembly, the sensing component also includes a sensing outer tube 42 and an insulating sleeve 43. The upper end of the sensing outer tube 42 is threadedly assembled to the lower end of the housing 1. The coil 44 is assembled in the sensing outer tube 42 using a bushing 46 and a tailstock 47. The bushing 41 guides the magnetic conductor 3, allowing it to enter the coil 4 more accurately. The circuit board 45 is fixed in the sensing outer tube 42 by the insulating sleeve 43 and extends from the sensing outer tube 42. The lower end of the aforementioned return spring 5 can abut against the sensing outer tube 42 or the insulating sleeve 43, achieving indirect installation of the return spring 5 and the housing 1. Further... Figure 7 As shown, a capacitor 48 is soldered on the circuit board 45. The two ends of the capacitor 48 and the coil 44 lead are connected in parallel. The capacitor 48 and the coil 44 form an LC oscillator to eliminate the influence of the connection line between the detector and this device.

[0058] Of course, the sensing component may also include only coil 44 and omit the circuit board, with coil 44 directly connected to an external detector.

[0059] During installation, the test head 2 is mounted at the side opening 11 of the housing 1. The needle core 3, inner spring 31, inner needle 32, return spring 5, and sensing outer tube 42 containing coil 44, circuit board 45, and insulating sleeve 43 are sequentially mounted in the hollow cavity 13 of the housing 1. The sensing outer tube 42 is then threadedly connected to the lower end of the housing 1, thus completing the assembly and fixation. Because the test head 2 protrudes from the side opening 11 of the housing 1, the test head 2 transmits the sensing force to the needle core 3 through the side pushing surface, and changes the testing direction through the side pushing surface. This allows for testing from the side. The needle core 3, magnetic conductor 34, and coil 44 are parallel to the object under test 100, and the working plane is vertically placed close to the object under test 100. This makes the size of the test module unrestricted, and the working surface is greatly reduced, which can meet the needs of miniaturized test modules.

[0060] Cooperate Figures 19 to 21 When in use, when the test head 2 touches the object under test 100, and the test head 2 is pressed into the outer shell 1 (radial movement), the test head 2 causes the needle core 3 to compress the return spring 5 and the magnetic conductor 34 to move downward (axial movement) through the side push surface. The side push surface changes the test direction. When the magnetic conductor 34 moves in the coil 44, the inductance of the coil 44 changes. By measuring the inductance or resonant frequency change of the coil 44 with the detector, the specific position of the magnetic conductor 44 can be obtained. It can not only detect and determine the existence of the object under test 100, but also detect the specific position of the object under test 100.

[0061] Furthermore, such as Figure 2 , Figure 4 , Figure 6 and Figure 9 As shown in the embodiment, a horizontal groove 14 can be formed at the upper end of the outer shell 1. The horizontal groove 14 is perpendicular to the hollow cavity 13. A side opening 11 is located at one end of the horizontal groove 14, and the other end of the horizontal groove 14 is open to allow the test head 2 to be inserted into the outer shell 1. For example... Figure 3 , Figure 5 , Figure 8 and Figure 10 As shown in the embodiment, the upper end of the outer shell 1 forms an inclined groove 15, the inclined groove 15 is set at an angle with the hollow cavity 13, the side opening 11 is located at the upper inclined end of the inclined groove 15, and the lower inclined end of the inclined groove 15 is open so that the test head can be installed in the outer shell.

[0062] Furthermore, such as Figure 2 , Figure 4 , Figure 6 and Figure 9 As shown in the embodiments, the present invention forms side-pushing surfaces on both the needle core 3 and the test head 2. The side-pushing surface of the needle core 3 is an inclined surface, and the side-pushing surface of the test head 2 is an arc surface. For example... Figure 3 , Figure 5 , Figure 8 and Figure 10 As shown in the embodiments, the present invention forms a side-pushing surface (arc surface) only on the test head 2.

[0063] Furthermore, the test head 2 of the present invention can have various forms to smoothly transmit and convert lateral forces into vertical forces. For example... Figure 2 , Figure 3 , Figure 6 and Figure 8 As shown in the embodiment, the test head 2 is spherical. For example... Figure 4 , Figure 5 , Figure 9 and Figure 10 As shown in the embodiment, the test head 2 is cylindrical, and both ends of the cylinder are spherical, in conjunction with... Figure 11 and Figure 12 As shown. For example... Figure 13 and Figure 14 As shown, the test head 2 is also cylindrical, but one end is a conical surface and the other end is a spherical surface. For example... Figure 15 and Figure 16 As shown, the test head 2 is also cylindrical, with conical ends. It can also be... Figure 17 and Figure 18As shown, the test head 2 is square-shaped with beveled ends. In short, regardless of the shape of the test head 2, as long as it can smoothly transmit lateral forces and convert them into vertical forces, it falls under the definition of the test head 2 of this invention.

[0064] The embodiments described above are merely illustrative of the technical ideas and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, they do not limit the patent scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should still be covered within the patent scope of the present invention.

Claims

1. A side position detection device characterized by comprising: The application relates to a test head, which comprises a shell, a test head, a needle core and a sensing assembly; the upper end of the shell is provided with a side opening, the lower end of the shell is provided with a lower opening, and the middle of the shell is provided with a hollow cavity connecting the side opening and the lower opening; The test head is limitedly arranged at the upper end side opening of the shell and can only partially expose outside the shell; the upper end of the needle core is provided with a side pushing surface matched with at least one of the test head; the needle core is arranged with a reset spring between the shell; the lower end of the needle core is provided with a tail needle extending downward; the sensing assembly is arranged at the lower end of the shell and extends from the lower opening to be connected with an external detector; when the test head is pressed into the shell, the test head makes the needle core compress the reset spring and drives the tail needle to move downward, and the detection result is obtained according to whether the tail needle is sensed by the sensing assembly.

2. A side position detection device according to claim 1, characterized in that: The tail needle is an elastic inner needle composed of an inner needle and an inner spring; the lower end of the needle core is provided with a movable groove; the inner needle is limitedly arranged in the movable groove of the needle core in a slidable mode; the inner spring is also arranged in the movable groove; and the inner needle elastically extends downward under the action of the inner spring; the sensing assembly comprises a probe; the probe is fixedly arranged at the lower end of the shell and extends from the lower opening to be connected with the external detector; when the test head is pressed into the shell, the test head makes the needle core compress the reset spring and drives the inner needle to move downward, and the detection result is obtained according to whether the probe contacts the inner needle.

3. A side position detecting device according to claim 2, wherein: The sensing assembly further comprises a sensing outer tube and an insulating sleeve; the upper end of the sensing outer tube is assembled at the lower end of the shell through screw connection; the probe is assembled in the sensing outer tube and fixed in the sensing outer tube through the insulating sleeve; and the lower end of the probe extends from the sensing outer tube.

4. A side position detecting device as claimed in claim 1, characterized in that: The tail needle is a magnetic conductor; the sensing assembly comprises a coil; the coil is used for generating inductance in cooperation with the moving magnetic conductor; the coil is connected with the external detector; when the test head is pressed into the shell, the test head makes the needle core compress the reset spring and drives the magnetic conductor to move downward; the inductance of the coil changes when the magnetic conductor moves in the coil; the specific position of the magnetic conductor can be obtained by measuring the inductance or the resonance frequency change of the coil through the detector, so that the specific position of the measured object is obtained. Alternatively, the tail needle is a magnetic conductor; the sensing assembly comprises a coil and a circuit board; the coil is used for generating inductance in cooperation with the moving magnetic conductor; the coil is connected with the circuit board; and the circuit board is connected with the external detector; when the test head is pressed into the shell, the test head makes the needle core compress the reset spring and drives the magnetic conductor to move downward; the inductance of the coil changes when the magnetic conductor moves in the coil; the specific position of the magnetic conductor can be obtained by measuring the inductance or the resonance frequency change of the coil through the detector, so that the specific position of the measured object is obtained.

5. A side position detecting device as claimed in claim 4, characterized in that: The sensing assembly further comprises a sensing outer tube and an insulating sleeve; the upper end of the sensing outer tube is assembled at the lower end of the shell through screw connection; the coil is assembled in the sensing outer tube through a bushing and a tail seat; and the circuit board is fixed in the sensing outer tube through the insulating sleeve; and the circuit board extends from the sensing outer tube.

6. A side position detecting device as claimed in claim 4, characterized in that: A capacitor is welded on the circuit board; the capacitor is connected with both ends of the coil lead; and the capacitor and the coil form an LC oscillator.

7. A side position detecting device as claimed in claim 1, characterized in that: The upper end of the shell forms a horizontal chute, the horizontal chute is vertically arranged with the hollow cavity, the side opening is located at one end of the horizontal chute, and the other end of the horizontal chute is open.

8. A side position detecting device as claimed in claim 1, characterized in that: The upper end of the shell forms an inclined chute, the inclined chute is arranged at an angle with the hollow cavity, the side opening is located at the obliquely upper end of the inclined chute, and the obliquely lower end of the inclined chute is open.

9. A side position detecting device as claimed in claim 1, characterized in that: The side pushing surface is formed at the upper end of the needle core or the test head.

10. A side position detecting device as claimed in claim 1, characterized in that: The test head is spherical. Alternatively, the test head is cylindrical, and both ends of the cylindrical test head are conical. Alternatively, the test head is cylindrical, one end of the cylindrical test head is conical, and the other end is spherical. Alternatively, the test head is cylindrical, both ends of the cylindrical test head are spherical. Alternatively, the test head is square columnar, and both ends of the square columnar test head are inclined.

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