Rapid PCR (Polymerase Chain Reaction) detection equipment

Abstract

The utility model relates to the technical field of PCR (Polymerase Chain Reaction) detection, in particular to rapid PCR detection equipment which is convenient for popping up a test tube independently and popping up the test tube together, so that the practicability is improved. Comprising a detection mechanism; the device further comprises a fixing mechanism, a plurality of placing mechanisms, a plurality of locking mechanisms, a plurality of unlocking mechanisms and a total unlocking mechanism, the fixing mechanism is installed on the detection mechanism, the placing mechanisms are installed in the detection mechanism, the locking mechanisms are installed in the detection mechanism, the unlocking mechanisms are installed in the detection mechanism, and the total unlocking mechanism is installed in the detection mechanism. PCR detection can be conveniently carried out through the detection mechanism, the detection mechanism is fixed through the fixing mechanism, test tubes can be conveniently placed and rebounded through the placing mechanism, the placing mechanism is conveniently fixed through the locking mechanism, one locking mechanism can be independently unlocked through the unlocking mechanism, and the test tubes in the multiple placing mechanisms can be conveniently ejected out through the total unlocking mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of PCR detection, in particular to a quick PCR detection device. Background Art

[0002] PCR detection is a molecular biology technique. Its full name is polymerase chain reaction. It is based on the mechanism of double-stranded DNA replication and is used to amplify specific DNA fragments. The principle of PCR detection is to use the DNA molecule to be amplified as a template and a pair of oligonucleotide fragments that are complementary to the 5' and 3' ends of the template as primers. Under the action of DNA polymerase, it extends along the template chain according to the mechanism of semi-conservative replication until new DNA synthesis is completed. Since each newly synthesized chain can be used as a template for the next round of replication, after multiple rounds of replication, the number of target DNA fragments will rapidly increase.

[0003] In the existing PCR detection technology, for example, the prior art with application number CN202220143912.4, it includes a main body, a control display panel, a carrying handle, a detection chamber, a test tube rack plate, an elastic pad, a connecting rod, a limit groove, a bidirectional threaded rod, a movable plate and a cover plate, etc. By providing the elastic pad and the limit groove, it can play a fixed buffering role for the detection reagent tube, and by combining the card block and the card groove, the vertical direction of the detection reagent tube can be fixed and protected. In addition, the presence of the test tube rack plate of the device itself can fix and protect the detection reagent tube in all directions.

[0004] However, the prior art uses a movable plate to push all reagent tubes out of the device together, and some of the pushed reagent tubes still contain samples that have not obtained test results, which is not conducive to the device's testing of samples that require different times, thereby affecting the quality of the test. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a quick PCR detection device which is convenient for ejecting test tubes individually and ejecting test tubes together, thereby improving practicality.

[0006] The utility model discloses a quick PCR detection device, comprising a detection mechanism; further comprising a fixing mechanism, a plurality of placement mechanisms, a plurality of locking mechanisms, a plurality of unlocking mechanisms and a total unlocking mechanism, wherein the fixing mechanism is installed on the detection mechanism, the placement mechanism is installed in the detection mechanism, the locking mechanism is installed in the detection mechanism, the unlocking mechanism is installed in the detection mechanism, and the total unlocking mechanism is installed in the detection mechanism, and the detection mechanism is convenient for performing PCR detection, the fixing mechanism fixes the detection mechanism, the placement mechanism is convenient for placing and rebounding test tubes, the locking mechanism is convenient for fixing the placement mechanism, the unlocking mechanism is convenient for unlocking a locking mechanism alone, and the total unlocking mechanism is convenient for ejecting test tubes in a plurality of placement mechanisms at the same time; the detection mechanism is convenient for performing PCR detection, the fixing mechanism fixes the detection mechanism, the placement mechanism is convenient for placing and rebounding test tubes, the locking mechanism is convenient for fixing the placement mechanism, the unlocking mechanism is convenient for unlocking a locking mechanism alone, and the total unlocking mechanism is convenient for ejecting test tubes in a plurality of placement mechanisms at the same time, thereby improving practicality.

[0007] Preferably, the detection mechanism includes a detection box, a cover plate and a rotating shaft, and the cover plate is rotatably mounted on the detection box via the rotating shaft; the PCR detection is completed by the detection box, and the detection box is sealed by the cover plate.

[0008] Preferably, the fixing mechanism includes a fixed lock, a first mounting plate, a second mounting plate, a locking pin, a limiting plate and a first spring, the fixed lock is mounted on the side wall of the cover plate, the first mounting plate is mounted on the side wall of the detection box, the second mounting plate is mounted on the bottom end of the first mounting plate, the locking pin is slidably mounted on the second mounting plate, the limiting plate is mounted on one end of the locking pin, the first spring connects the second mounting plate and the limiting plate, and a locking hole is provided on the fixed lock; first, the limiting plate is pulled to lengthen the first spring, and then the cover plate is rotated so that the fixed lock passes through the first mounting plate, and when the locking pin is aligned with the locking hole, the limiting plate is released, and the locking pin is inserted into the locking hole of the fixed lock by the elasticity of the first spring, thereby completing the fixation of the cover plate.

[0009] Preferably, the placement mechanism includes a placement hole, a sliding plate and a second spring. A placement hole is provided in the detection box, and the sliding plate is slidably installed in the placement hole. The second spring connects the bottom surface inside the placement hole and the sliding plate. The test tube is placed in the placement hole, and then the test tube is pressed to make the sliding plate slide in the placement hole, so that the second spring contracts and the sliding plate is fixed by the locking mechanism. When the unlocking mechanism or the total unlocking mechanism unlocks the locking mechanism, the sliding plate is pushed to slide in the placement hole by the elasticity of the second spring, and then the test tube is pushed out of the placement hole.

[0010] Preferably, the locking mechanism includes a sliding limit plate, a locking rod and a third spring, a chamber is provided in the detection box, the sliding limit plate is slidably installed in the chamber, the locking rod is installed on the sliding limit plate, the locking rod is slidably installed on the side wall of the chamber, the locking rod can be extended into the placement hole, the third spring connects the inner wall of the chamber and the sliding limit plate, and a keyhole is provided on the sliding plate; first, the unlocking mechanism is pressed, and the sliding limit plate is pushed to slide in the chamber through the unlocking mechanism, thereby stretching the third spring so that the locking rod enters the chamber and places the test tube in the placement hole, and then the test tube is pressed to make the sliding plate slide in the placement hole, so that the second spring contracts, and when the locking rod is aligned with the keyhole, the unlocking mechanism is released, and the locking rod is pushed into the keyhole by the elasticity of the third spring, thereby completing the fixation of the sliding plate, and when the unlocking mechanism or the total unlocking mechanism unlocks the locking mechanism, the sliding plate is pushed to slide in the placement hole by the elasticity of the second spring, thereby pushing the test tube out of the placement hole.

[0011] Preferably, the unlocking mechanism includes a first push rod and a connecting rod, and a slide is provided on the detection box, the first push rod is slidably installed in the slide, one end of the connecting rod is rotatably installed on the sliding limit plate, and the other end of the connecting rod is rotatably installed on the bottom end of the first push rod; first, the first push rod is pressed, and the sliding limit plate is pushed to slide in the chamber through the connecting rod, thereby stretching the third spring, so that the locking rod enters the chamber, and the test tube is placed in the placement hole, and then the test tube is pressed to make the sliding plate slide in the placement hole, so that the second spring contracts, and when the locking rod is aligned with the keyhole, the first push rod is released, and the locking rod is pushed into the keyhole by the elasticity of the third spring, thereby completing the fixation of the sliding plate, and when a test tube needs to be ejected separately, the first push rod is pressed, the sliding limit plate slides in the chamber, thereby stretching the third spring, so that the locking rod enters the chamber, and the sliding plate is pushed to slide in the placement hole by the elasticity of the second spring, thereby pushing the test tube out of the placement hole.

[0012] Preferably, the total unlocking mechanism includes a second push rod, a fifth spring, a first connecting plate, a second connecting plate and a pressing block, a second slide is provided on the detection box, the second push rod is slidably installed in the second slide, the fifth spring is installed at the bottom end of the second push rod, and the other end of the fifth spring is installed on the inner bottom surface of the second slide, a total driving chamber is provided in the detection box, the first connecting plate is installed on the second push rod, the first connecting plate is slidably installed in the total driving chamber, the second connecting plate is installed on the first connecting plate, and the pressing block is installed on the side wall of the first push rod; by pressing the second push rod, the fifth spring contracts, and then the second connecting plate is driven by the first connecting plate to press all the pressing blocks, so that the first push rod slides in the slide, and the sliding limit plate is pushed to slide in the chamber by the connecting rod, thereby stretching the third spring, so that the locking rod enters into the chamber, and the sliding plate is pushed to slide in the placement hole by the elasticity of the second spring, thereby all test tubes are pushed out of the placement hole, and the second push rod can be reset by the fifth spring.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the detection mechanism facilitates PCR detection, the fixing mechanism fixes the detection mechanism, the placement mechanism facilitates the placement and rebound of the test tube, the locking mechanism facilitates the fixation of the placement mechanism, the unlocking mechanism facilitates the unlocking of a locking mechanism individually, and the total unlocking mechanism facilitates the simultaneous ejection of test tubes in multiple placement mechanisms, thereby improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a first axonometric structural schematic diagram of the utility model;

[0015] Figure 2 It is a second axonometric structural schematic diagram of the utility model;

[0016] Figure 3 It is a third axonometric structural schematic diagram of the utility model;

[0017] Figure 4 It is a schematic diagram of the top-view cross-section axonometric structure of the utility model;

[0018] Figure 5 It is a schematic diagram of the first side cross-sectional axonometric structure of the utility model;

[0019] Figure 6 It is a front cross-sectional structural schematic diagram of the utility model;

[0020] Figure 7 It is a second side view cross-sectional axonometric structural schematic diagram of the utility model;

[0021] Figure 8 The utility model Figure 5 A schematic diagram of the enlarged structure at A in the middle;

[0022] Markings in the accompanying drawings: 01, detection mechanism; 11, detection box; 12, cover plate; 13, rotating shaft; 02, fixing mechanism; 21, fixed lock; 22, first mounting plate; 23, second mounting plate; 24, locking pin; 25, limiting plate; 26, first spring; 03, placement mechanism; 31, placement hole; 32, sliding plate; 33, second spring; 04, locking mechanism; 41, sliding limiting plate; 42, locking rod; 43, third spring; 44, keyhole; 05, unlocking mechanism; 51, first push rod; 52, connecting rod; 06, total unlocking mechanism; 61, second push rod; 62, fifth spring; 63, first connecting plate; 64, second connecting plate; 65, pressing block. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0024] Example 1

[0025] like Figure 2 and Figure 3 As shown, a quick PCR detection device includes a detection mechanism 01, a fixing mechanism 02, a plurality of placement mechanisms 03, a plurality of locking mechanisms 04, a plurality of unlocking mechanisms 05 and a total unlocking mechanism 06, wherein the fixing mechanism 02 is installed on the detection mechanism 01, the placement mechanism 03 is installed in the detection mechanism 01, the locking mechanism 04 is installed in the detection mechanism 01, the unlocking mechanism 05 is installed in the detection mechanism 01, and the total unlocking mechanism 06 is installed in the detection mechanism 01;

[0026] The detection mechanism 01 is used to facilitate PCR detection, the fixing mechanism 02 fixes the detection mechanism 01, the placement mechanism 03 is used to facilitate the placement and rebound of the test tube, the locking mechanism 04 is used to facilitate the fixing of the placement mechanism 03, the unlocking mechanism 05 is used to facilitate the unlocking of a locking mechanism 04 alone, and the total unlocking mechanism 06 is used to facilitate the ejection of test tubes in multiple placement mechanisms 03 at the same time;

[0027] The detection mechanism 01 includes a detection box 11, a cover plate 12 and a rotating shaft 13, and the cover plate 12 is rotatably mounted on the detection box 11 via the rotating shaft 13;

[0028] The fixing mechanism 02 includes a fixed lock head 21, a first mounting plate 22, a second mounting plate 23, a lock pin 24, a limit plate 25 and a first spring 26. The fixed lock head 21 is mounted on the side wall of the cover plate 12, the first mounting plate 22 is mounted on the side wall of the detection box 11, the second mounting plate 23 is mounted on the bottom end of the first mounting plate 22, the lock pin 24 is slidably mounted on the second mounting plate 23, the limit plate 25 is mounted on one end of the lock pin 24, the first spring 26 connects the second mounting plate 23 and the limit plate 25, and a lock hole is provided on the fixed lock head 21;

[0029] The PCR test is completed through the detection box 11, and the detection box 11 is sealed by the cover 12. First, the limit plate 25 is pulled to stretch the first spring 26, and then the cover 12 is rotated to allow the fixed lock head 21 to pass through the first mounting plate 22. When the locking pin 24 is aligned with the lock hole, the limit plate 25 is released, and the locking pin 24 is inserted into the lock hole of the fixed lock head 21 through the elasticity of the first spring 26, thereby completing the fixation of the cover 12. The placement mechanism 03 is convenient for placing and rebounding the test tube, the locking mechanism 04 is convenient for fixing the placement mechanism 03, the unlocking mechanism 05 is convenient for unlocking a locking mechanism 04 alone, and the total unlocking mechanism 06 is convenient for ejecting the test tubes in multiple placement mechanisms 03 at the same time, thereby improving practicality.

[0030] Example 2

[0031] like Figures 4 to 8 As shown, a quick PCR detection device includes a detection mechanism 01, a fixing mechanism 02, a plurality of placement mechanisms 03, a plurality of locking mechanisms 04, a plurality of unlocking mechanisms 05 and a total unlocking mechanism 06, wherein the fixing mechanism 02 is installed on the detection mechanism 01, the placement mechanism 03 is installed in the detection mechanism 01, the locking mechanism 04 is installed in the detection mechanism 01, the unlocking mechanism 05 is installed in the detection mechanism 01, and the total unlocking mechanism 06 is installed in the detection mechanism 01;

[0032] The detection mechanism 01 is used to facilitate PCR detection, the fixing mechanism 02 fixes the detection mechanism 01, the placement mechanism 03 is used to facilitate the placement and rebound of the test tube, the locking mechanism 04 is used to facilitate the fixing of the placement mechanism 03, the unlocking mechanism 05 is used to facilitate the unlocking of a locking mechanism 04 alone, and the total unlocking mechanism 06 is used to facilitate the ejection of test tubes in multiple placement mechanisms 03 at the same time;

[0033] The placement mechanism 03 includes a placement hole 31, a sliding plate 32 and a second spring 33. The placement hole 31 is provided in the detection box 11, and the sliding plate 32 is slidably installed in the placement hole 31. The second spring 33 connects the bottom surface of the placement hole 31 and the sliding plate 32.

[0034] The locking mechanism 04 includes a sliding limit plate 41, a locking rod 42 and a third spring 43. A chamber is provided in the detection box 11. The sliding limit plate 41 is slidably installed in the chamber. The locking rod 42 is installed on the sliding limit plate 41. The locking rod 42 is slidably installed on the side wall of the chamber. The locking rod 42 can extend into the placement hole 31. The third spring 43 connects the inner wall of the chamber with the sliding limit plate 41. A keyhole 44 is provided on the sliding plate 32.

[0035] The unlocking mechanism 05 includes a first push rod 51 and a connecting rod 52. A slideway is provided on the detection box 11. The first push rod 51 is slidably installed in the slideway. One end of the connecting rod 52 is rotatably installed on the sliding limit plate 41. The other end of the connecting rod 52 is rotatably installed at the bottom end of the first push rod 51.

[0036] The total unlocking mechanism 06 includes a second push rod 61, a fifth spring 62, a first connecting plate 63, a second connecting plate 64 and a pressing block 65. A second slideway is provided on the detection box 11, the second push rod 61 is slidably installed in the second slideway, the fifth spring 62 is installed at the bottom end of the second push rod 61, and the other end of the fifth spring 62 is installed on the inner bottom surface of the second slideway. A total driving chamber is provided in the detection box 11, the first connecting plate 63 is installed on the second push rod 61, the first connecting plate 63 is slidably installed in the total driving chamber, the second connecting plate 64 is installed on the first connecting plate 63, and the pressing block 65 is installed on the side wall of the first push rod 51;

[0037] The detection mechanism 01 is used to facilitate PCR detection. The fixing mechanism 02 fixes the detection mechanism 01. First, the first push rod 51 is pressed, and the sliding limit plate 41 is pushed to slide in the chamber through the connecting rod 52, thereby stretching the third spring 43, so that the locking rod 42 enters the chamber, and the test tube is placed in the placement hole 31. Then, the test tube is pressed to make the sliding plate 32 slide in the placement hole 31, so that the second spring 33 contracts. When the locking rod 42 is aligned with the keyhole 44, the first push rod 51 is released, and the locking rod 42 is pushed into the keyhole 44 by the elasticity of the third spring 43, thereby completing the fixation of the sliding plate 32. When a test tube needs to be ejected separately, the sliding limit plate 41 slides in the chamber by pressing the first push rod 51, and then The third spring 43 is stretched to allow the locking rod 42 to enter the chamber, and the sliding plate 32 is pushed to slide in the placement hole 31 by the elasticity of the second spring 33, so that the test tube is pushed out of the placement hole 31, and the fifth spring 62 is contracted by pressing the second push rod 61, and then the second connecting plate 64 is driven by the first connecting plate 63 to press all the pressing blocks 65, so that the first push rod 51 slides in the slide, and the sliding limit plate 41 is pushed to slide in the chamber by the connecting rod 52, and then the third spring 43 is stretched to allow the locking rod 42 to enter the chamber, and the sliding plate 32 is pushed to slide in the placement hole 31 by the elasticity of the second spring 33, so that all test tubes are pushed out of the placement hole 31, and the second push rod 61 can be reset by the fifth spring 62.

[0038] like Figures 1 to 8As shown, a quick PCR detection device of the present invention completes PCR detection through the detection box 11 during operation, and seals the detection box 11 through the cover plate 12. First, the limit plate 25 is pulled to lengthen the first spring 26, and then the cover plate 12 is rotated to make the fixed lock head 21 pass through the first mounting plate 22. When the locking pin 24 is aligned with the lock hole, the limit plate 25 is released, and the locking pin 24 is inserted into the lock hole of the fixed lock head 21 by the elasticity of the first spring 26, thereby completing the fixation of the cover plate 12. First, the first push rod 51 is pressed, and the sliding limit plate 41 is pushed to slide in the chamber by the connecting rod 52, thereby lengthening the third spring 43, so that the locking rod 42 enters the chamber, and the test tube is placed in the placement hole 31. Then, the test tube is pressed to make the sliding plate 32 slide in the placement hole 31, so that the second spring 33 contracts. When the locking rod 42 is aligned with the keyhole 44, the first push rod 51 is released, and the elasticity of the third spring 43 is The locking rod 42 is pushed into the keyhole 44, thereby completing the fixation of the sliding plate 32. When a test tube needs to be ejected separately, the first push rod 51 is pressed, the sliding limit plate 41 slides in the chamber, and then the third spring 43 is lengthened, so that the locking rod 42 enters the chamber, and the sliding plate 32 is pushed to slide in the placement hole 31 by the elasticity of the second spring 33, thereby pushing the test tube out of the placement hole 31, and pressing the second push rod 61 to make the fifth spring 62 contract, and then the first connecting plate 63 drives the second connecting plate 64 to press all the pressing blocks 65, so that the first push rod 51 slides in the slideway, and the sliding limit plate 41 is pushed to slide in the chamber by the connecting rod 52, thereby stretching the third spring 43, so that the locking rod 42 enters the chamber, and the sliding plate 32 is pushed to slide in the placement hole 31 by the elasticity of the second spring 33, thereby all test tubes are pushed out of the placement hole 31, and the second push rod 61 can be reset by the fifth spring 62.

[0039] The detection box 11 of the utility model is purchased on the market, and technicians in the industry only need to install and operate it according to the accompanying instruction manual, without the need for technicians in the field to make creative efforts.

[0040] The main function achieved by the utility model is that during the PCR detection process, the test tubes can be easily ejected individually or together, thereby improving the practicality.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A quick PCR detection device, comprising a detection mechanism (01); characterized in that: It also includes a fixing mechanism (02), a plurality of placement mechanisms (03), a plurality of locking mechanisms (04), a plurality of unlocking mechanisms (05) and a total unlocking mechanism (06), wherein the fixing mechanism (02) is installed on the detection mechanism (01), the placement mechanism (03) is installed in the detection mechanism (01), the locking mechanism (04) is installed in the detection mechanism (01), the unlocking mechanism (05) is installed in the detection mechanism (01), and the total unlocking mechanism (06) is installed in the detection mechanism (01); The detection mechanism (01) is convenient for performing PCR detection, the fixing mechanism (02) fixes the detection mechanism (01), the placement mechanism (03) is convenient for placing and rebounding the test tube, the locking mechanism (04) is convenient for fixing the placement mechanism (03), the unlocking mechanism (05) is convenient for unlocking a locking mechanism (04) individually, and the total unlocking mechanism (06) is convenient for ejecting the test tubes in multiple placement mechanisms (03) at the same time.

2. A quick PCR detection device as claimed in claim 1, characterized in that: The detection mechanism (01) comprises a detection box (11), a cover plate (12) and a rotating shaft (13); the cover plate (12) is rotatably mounted on the detection box (11) via the rotating shaft (13).

3. A quick PCR detection device as claimed in claim 2, characterized in that: The fixing mechanism (02) comprises a fixed lock (21), a first mounting plate (22), a second mounting plate (23), a lock pin (24), a limit plate (25) and a first spring (26); the fixed lock (21) is mounted on the side wall of the cover plate (12); the first mounting plate (22) is mounted on the side wall of the detection box (11); the second mounting plate (23) is mounted on the bottom end of the first mounting plate (22); the lock pin (24) is slidably mounted on the second mounting plate (23); the limit plate (25) is mounted on one end of the lock pin (24); the first spring (26) connects the second mounting plate (23) and the limit plate (25); and a lock hole is provided on the fixed lock (21).

4. A quick PCR detection device as claimed in claim 2, characterized in that: The placement mechanism (03) comprises a placement hole (31), a sliding plate (32) and a second spring (33). The placement hole (31) is provided in the detection box (11), the sliding plate (32) is slidably installed in the placement hole (31), and the second spring (33) connects the bottom surface inside the placement hole (31) and the sliding plate (32).

5. A quick PCR detection device as claimed in claim 2, characterized in that: The locking mechanism (04) comprises a sliding limit plate (41), a locking rod (42) and a third spring (43). A chamber is provided in the detection box (11). The sliding limit plate (41) is slidably installed in the chamber. The locking rod (42) is installed on the sliding limit plate (41). The locking rod (42) is slidably installed on the side wall of the chamber. The locking rod (42) can extend into the placement hole (31). The third spring (43) connects the inner wall of the chamber with the sliding limit plate (41). A keyhole (44) is provided on the sliding plate (32).

6. A quick PCR detection device as claimed in claim 2, characterized in that: The unlocking mechanism (05) comprises a first push rod (51) and a connecting rod (52). A slideway is provided on the detection box (11). The first push rod (51) is slidably mounted in the slideway. One end of the connecting rod (52) is rotatably mounted on the sliding limit plate (41). The other end of the connecting rod (52) is rotatably mounted on the bottom end of the first push rod (51).

7. A quick PCR detection device as claimed in claim 2, characterized in that: The total unlocking mechanism (06) comprises a second push rod (61), a fifth spring (62), a first connecting plate (63), a second connecting plate (64) and a pressing block (65); a second slideway is provided on the detection box (11); the second push rod (61) is slidably mounted in the second slideway; the fifth spring (62) is mounted at the bottom end of the second push rod (61); the other end of the fifth spring (62) is mounted on the inner bottom surface of the second slideway; a total driving chamber is provided in the detection box (11); the first connecting plate (63) is mounted on the second push rod (61); the first connecting plate (63) is slidably mounted in the total driving chamber; the second connecting plate (64) is mounted on the first connecting plate (63); and the pressing block (65) is mounted on the side wall of the first push rod (51).

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