Conveying device

Abstract

The utility model relates to a conveying device, which is used for conveying a sample frame and comprises a supporting unit, a driving unit and a driving unit, the feeding unit comprises a feeding channel, a first driving assembly and a first pushing assembly, the feeding channel extends in the first direction and is arranged on the supporting base, the feeding channel is provided with a first conveying belt, the first driving assembly is arranged on the supporting base, and the first driving assembly is connected with the first conveying belt so as to drive the first conveying belt to act; the recovery unit comprises a recovery channel and a second material pushing assembly, the recovery channel extends in the first direction and is arranged on the supporting base, the second material pushing assembly comprises a second material pushing piece movably arranged on the supporting base, and the second material pushing piece is driven to move in the first direction to push the sample frame placed in the recovery channel. According to the sample frame conveying device, the conveying efficiency of the sample frames can be improved, interactive conveying of the sample frames can be reliably achieved, and the sample frame conveying device is compact in structure and small in occupied space, so that space can be effectively saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially is a kind of conveying device. BACKGROUND

[0002] In the biological and medical field, especially in medical research and laboratory environment, sample holder plays an important role, and the sample holder is a device for storing and transporting samples (such as biological samples, chemical samples, etc.), which is usually used to organize and store multiple samples for subsequent analysis, testing or experiments. The design of the sample holder usually needs to meet the storage conditions of the sample and be easy to access for the convenience of the experimental personnel. In the prior art, a push mechanism is usually used to realize the interactive transfer of the sample holder between the pipeline system and the functional instrument.

[0003] However, the prior art has the disadvantage that the structure of the single push mechanism is relatively large due to the consideration of stroke, and the interactive transfer needs to be realized by one in and one out, which results in the need for a large space for the entire interactive mechanism, and the structure of the track transmission mechanism between different functional instruments in the in-vitro diagnostic analysis pipeline system is also relatively complex, thus resulting in a complex overall structure and the need for a large amount of space. SUMMARY

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the shortcomings of the prior art, provide a conveying device that can reliably realize the interactive transfer of the sample holder, and the structure of the sample holder conveying device is compact, requiring less space, thereby effectively saving space.

[0005] To solve the above technical problems, the utility model provides a conveying device for interactive transfer of sample holder, comprising,

[0006] The support unit comprises a support seat;

[0007] The feeding unit comprises a feeding channel, a first driving assembly and a first pushing assembly. The feeding channel is arranged in the support seat along the first direction. The feeding channel is provided with a first conveying belt. The first driving assembly is arranged in the support seat, and the first driving assembly is connected with the first conveying belt to drive the first conveying belt to act. The first pushing assembly comprises a first pushing piece movably arranged in the support seat. The first pushing piece can be driven to move along the first direction to push the sample holder placed on the first conveying belt.

[0008] a recovery unit comprising a recovery channel and a second pushing assembly, the recovery channel is arranged on the support base along the first direction, the second pushing assembly comprises a second pushing member movably arranged on the support base, the second pushing member is driven to move along the first direction to push the sample rack placed in the recovery channel; the recovery channel and the feeding channel are arranged along a second direction, the second direction is perpendicular to the first direction; the second pushing member is also driven to move along the second direction to avoid the sample rack;

[0009] a detection unit comprising a first detection assembly and a second detection assembly, the first detection assembly is used to detect the position of the sample rack on the first conveying belt; the second detection assembly is used to detect the position of the sample rack in the recovery channel;

[0010] a control unit connected with the feeding unit, the recovery unit and the detection unit, the control unit collects signals from the detection unit to control the feeding unit and the recovery unit.

[0011] In an embodiment of the present application, the first detection assembly comprises a first sensor arranged on the support base, the number of the first sensor is two, and the two first sensors are arranged near the two ends of the first conveying belt.

[0012] In an embodiment of the present application, the second detection assembly comprises a second sensor arranged on the support base, the number of the second sensor is two, and the two second sensors are arranged adjacent to the recovery channel and near the two ends of the recovery channel.

[0013] In an embodiment of the present application, the detection unit further comprises a first reset detection sensor arranged adjacent to the first conveying belt, the first reset detection sensor is located at one end of the first conveying belt, and the first reset detection sensor is used to detect the position of the first pushing member on the first conveying belt to control the action of the first pushing member.

[0014] In an embodiment of the present application, the detection unit further comprises a second reset detection sensor arranged at one end of the recovery channel, and the second reset detection sensor is used to detect the position of the second pushing member in the recovery channel to control the action of the second pushing member.

[0015] In an embodiment of the utility model, first drive assembly still include the first drive piece and first transmission mechanism of assembly in support seat, first transmission mechanism includes first transmission wheel, second transmission wheel and first belt, first transmission wheel and second transmission wheel interval setting along height direction, first belt transmission is connected with first transmission wheel and second transmission wheel, the output of first drive piece connects first transmission wheel, drives first transmission wheel action.

[0016] In an embodiment of the utility model, the first pushing assembly further comprises a second driving member and a second transmission mechanism, the second transmission mechanism comprises a third transmission wheel, a fourth transmission wheel and a second belt, the third transmission wheel and the fourth transmission wheel are spaced apart along the first direction, the second belt is in transmission connection with the third transmission wheel and the fourth transmission wheel, and the output end of the second driving member is connected with the third transmission wheel to drive the third transmission wheel to act; the first pushing member is connected with the second belt.

[0017] In an embodiment of the utility model, the first pushing member comprises a first connecting plate, a first pushing block and an elastic member, the first connecting plate is fixedly connected with the second belt, and the first pushing block is elastically connected with the first connecting plate through the elastic member.

[0018] In an embodiment of the utility model, the second pushing assembly further comprises a third driving member and a third transmission mechanism, the third transmission mechanism comprises a fifth transmission wheel, a sixth transmission wheel and a third belt, the fifth transmission wheel and the sixth transmission wheel are spaced apart along the first direction, the third belt is in transmission connection with the fifth transmission wheel and the sixth transmission wheel, and the output end of the third driving member is connected with the fifth transmission wheel to drive the fifth transmission wheel to act; the second pushing member is connected with the third belt.

[0019] In an embodiment of the utility model, the first pushing assembly further comprises a first guide rail and a first sliding block slidingly arranged on the first guide rail, the first guide rail is arranged in extension along the first direction, and the first pushing member is connected with the first sliding block; the second pushing assembly further comprises a second guide rail and a second sliding block slidingly connected with the second guide rail, the second guide rail is arranged in extension along the first direction, and the second pushing member is connected with the second sliding block.

[0020] The above technical scheme of the utility model has the following advantages compared with the prior art:

[0021] The utility model relates to a conveying device, be equipped with support unit, feed unit, recovery unit, detection unit and control unit, support unit is used for bearing feed unit, recovery unit and detection unit, feed unit is provided with feed passageway, first drive assembly and first push material subassembly, is provided with first conveying belt to feed passageway, and the sample holder that waits to convey is placed in first conveying belt, and can move under the drive of first conveying belt, cooperation first push material subassembly can push sample holder from the end of first drive belt to facilitate sample holder collection to transfer mechanism, when the sample holder is recovered, second push material piece can move along second direction to avoid the recovery path of sample holder, after sample holder is placed in position in recovery passageway, second push material piece extends along second direction, then moves along first direction to push sample holder to specified position, the conveying device of the utility model, compared with single push hand transmission structure in prior art, can effectively solve the problem of long stroke in prior art device, and improve the conveying efficiency of sample holder, reliably realize the interactive transmission of sample holder, and the compact structure of sample holder conveying device needs to occupy the space smaller, thereby can effectively save space. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to make the content of the utility model more easily be clearly understood, the following according to the specific embodiment of the utility model and combining with the drawings, the utility model is further detailed, wherein.

[0023] Fig. 1 It is the first perspective schematic drawing of the overall structure of the preferred embodiment of the utility model.

[0024] Fig. 2 It is the second perspective schematic drawing of the overall structure of the preferred embodiment of the utility model.

[0025] Fig. 3 It is the structural schematic drawing of second push material subassembly, mounting bracket and support vertical plate of the preferred embodiment of the utility model.

[0026] Fig. 4 It is the structural schematic drawing of first push material piece of the preferred embodiment of the utility model.

[0027] The description reference signs are as follows: 10, support seat; 11, support vertical plate; 12, mounting frame; 20, feeding channel; 21, first conveying belt; 22, first pushing piece; 220, first connecting plate; 221, first pushing block; 222, elastic piece; 23, first driving piece; 24, first transmission wheel; 25, second transmission wheel; 26, first belt; 27, seventh transmission wheel; 28, eighth transmission wheel; 30, recycling channel; 31, second pushing piece; 310, second connecting plate; 311, second pushing block; 32, third driving piece; 33, fifth transmission wheel; 34, sixth transmission wheel; 35, third belt; 41, left first sensor; 42, right first sensor; 43, right second sensor; 44, left second sensor; 45, first reset detection sensor; 46, second reset detection sensor; 50, second driving piece; 51, third transmission wheel; 52, fourth transmission wheel; 53, second belt; 60, first guide rail; 61, second guide rail; 62, third guide rail. DETAILED DESCRIPTION

[0028] The utility model will be further explained in connection with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model. Embodiment one

[0029] Referring to Figs. 1 to 4 The utility model discloses a conveying device for interactive conveying sample holder.

[0030] The conveying device comprises a support unit, and the support unit comprises a support seat 10.

[0031] The conveying device further comprises a feeding unit, and the feeding unit comprises a feeding channel 20, a first driving assembly and a first pushing assembly.

[0032] The first pushing assembly comprises a first pushing piece 22 movably arranged on the support seat 10, and the first pushing piece 22 can be driven to move along the first direction to push the sample holder placed on the first conveying belt 21.

[0033] The conveying device further comprises a recycling unit, the recycling unit comprises a recycling channel 30 and a second pushing assembly, the recycling channel 30 is arranged on the support base 10 along the first direction, the second pushing assembly comprises a second pushing member 31 movably arranged on the support base 10, the second pushing member 31 is driven to move along the first direction to push the sample rack placed on the recycling channel 30.

[0034] It should be noted that the recycling channel 30 and the feeding channel 20 are arranged along a second direction, the second direction is perpendicular to the first direction.

[0035] Meanwhile, the second pushing member 31 can also be driven to move along the second direction, so that when the sample rack needs to be recycled, the second pushing member 31 is first controlled to move along the second direction to avoid the sample rack, and then when the sample rack is placed on the recycling channel 30, the second pushing member 31 is controlled to push the sample rack along the first direction and push it to the designated position.

[0036] The conveying device further comprises a detection unit, the detection unit comprises a first detection assembly and a second detection assembly. Specifically, the first detection assembly is installed on the support base 10, and the first detection assembly is used to detect the position of the sample rack on the first conveying belt 21. The second detection assembly is installed on the support base 10, and the second detection assembly is used to detect the position of the sample rack on the recycling channel 30.

[0037] The conveying device further comprises a control unit, the control unit is connected with the feeding unit, the recycling unit and the detection unit, so that the control unit can collect signals from the detection unit to control the feeding unit and the recycling unit to act.

[0038] Therefore, the conveying device to be protected by the utility model, be equipped with support unit, feed unit, recycling unit, detection unit and control unit, support unit is used for bearing feed unit, recycling unit and detection unit, feed unit is provided with feed channel, first drive assembly and first push assembly, feed channel is provided with first conveying belt, the sample holder to be conveyed is placed in first conveying belt, and can be moved under the drive of first conveying belt, cooperation first push assembly, can push sample holder from the end of first drive belt, so as to sample holder collection to transfer mechanism;When recycling sample holder, the second push piece can move along the second direction, in order to avoid the recycling path of sample holder, after sample holder is placed in recycling channel in place, the second push piece extends along the second direction, then moves along the first direction, in order to push sample holder to the designated position.The conveying device of the utility model, compared with the single push hand transmission structure in the prior art, can effectively solve the problem of too long stroke, and improve the conveying efficiency of sample holder, so that the interactive conveying of sample holder can be reliably realized, and the structure of the sample holder conveying device is compact, and the space occupied is small, so that the space can be effectively saved.

[0039] Specifically, the support unit further comprises two support vertical plates 11, the two support vertical plates 11 are oppositely arranged, and the two ends of the support base 10 are respectively fixedly assembled to the support vertical plates 11.

[0040] As a preferred embodiment, the first detection assembly comprises a first sensor arranged on the support base 10. The number of the first sensor is two, and the two first sensors are respectively arranged near the two ends of the first conveying belt 21. Specifically, one of the first sensors is located at the inlet end of the first conveying belt 21, which is defined as a left first sensor 41, and the other first sensor is located at the outlet end of the first conveying belt 21, which is defined as a right first sensor 42.

[0041] In the embodiment, the left first sensor 41 and the right first sensor 42 are photoelectric sensors.

[0042] As a preferred embodiment, the second detection assembly comprises a second sensor arranged on the support base 10. The number of the second sensor is two, and the two second sensors are arranged adjacent to the recycling channel 30 and respectively near the two ends of the recycling channel 30. Specifically, one of the second sensors is located at the inlet end of the recycling channel 30, which is defined as a right second sensor 43, and the other second sensor is located at the outlet end of the recycling channel 30, which is defined as a left second sensor 44.

[0043] In the embodiment, the left second sensor 43 and the right second sensor 44 are photoelectric sensors.

[0044] The detection unit further comprises a first reset detection sensor 45 arranged adjacent to the first conveying belt 21, the first reset detection sensor 45 being located at one end of the first conveying belt 21, and the first reset detection sensor 45 being used to detect the position of the first pushing member 22 on the first conveying belt 21 to output a signal to the control unit, so as to control the action of the first pushing member 22.

[0045] The detection unit further comprises a second reset detection sensor 46 arranged at one end of the recycling channel 30, and the second reset detection sensor 46 being used to detect the position of the second pushing member 31 in the recycling channel 30 to output a signal to the control unit, so as to control the action of the second pushing member 31.

[0046] In operation, the running process of the sample holder in the feeding unit is as follows:

[0047] When the left first sensor 41 detects that there is a new sample holder on the feeding channel 20, the flat belt driving motor 1 drives the first conveying belt 21 on the feeding channel 20 to move from left to right through the synchronous belt conveying mechanism, and the sample holder is moved together by the friction force generated by the first conveying belt 21, and moves to the right first sensor 42, and the first driving assembly stops, so that the first conveying belt 21 stops. When the transfer mechanism receives the sample holder beside the conveying device, the first driving assembly is started again to convey the sample holder to the transfer mechanism, and then the first driving assembly stops working; then the first pushing member 22 is driven to move right along the first conveying belt 21 to push the sample holder into position. Finally, the first pushing member 22 is driven to move left until the first reset detection sensor 45 is triggered, and the action is stopped.

[0048] In operation, the running process of the sample holder in the recycling unit is as follows:

[0049] The transfer mechanism sends the sample holder into the recycling channel 30, and when the left second sensor 44 detects the sample holder, it means that the sample holder has been in position, and at this time the transfer mechanism can be removed. The second pushing member 31 is driven to move left in the recycling channel 30, and in this process, the second pushing member 31 extends in the second direction and pushes the sample holder away from the recycling channel 30. Then the second pushing member 31 is driven to move right until the second reset detection sensor 46 is triggered, and then the second pushing member 31 stops moving. It should be noted that when only the right second sensor 43 detects the sample holder in the recycling channel 30, it means that the sample holder has not been completely in position in the recycling channel 30, and at this time the sample holder recycling action cannot be performed.

[0050] In detail, the first driving assembly further comprises a first driving member 23 and a first transmission mechanism assembled on the support base 10. The first transmission mechanism comprises a first transmission wheel 24, a second transmission wheel 25 and a first belt 26. The first transmission wheel 24 and the second transmission wheel 25 are arranged in a spaced apart manner along the height direction. The first belt 26 is in transmission connection with the first transmission wheel 24 and the second transmission wheel 25. The output end of the first driving member 23 is connected with the first transmission wheel 24 to drive the first transmission wheel 24 to move, thereby driving the second transmission wheel 25 to move.

[0051] The feeding unit further comprises a seventh transmission wheel 27 and an eighth transmission wheel 28 arranged in a spaced apart manner along the first direction. The first conveying belt 21 is in transmission connection with the seventh transmission wheel 27 and the eighth transmission wheel 28. The seventh transmission wheel 27 is coaxially connected with the second transmission wheel 25 and can synchronously rotate.

[0052] The first driving member 23 comprises but is not limited to a driving motor.

[0053] Further, the first pushing assembly further comprises a second driving member 50 and a second transmission mechanism arranged on the support base 10. The second transmission mechanism comprises a third transmission wheel 51, a fourth transmission wheel 52 and a second belt 53. The third transmission wheel 51 and the fourth transmission wheel 52 are arranged in a spaced apart manner along the first direction. The second belt 53 is in transmission connection with the third transmission wheel 51 and the fourth transmission wheel 52. The output end of the second driving member 50 is connected with the third transmission wheel 51 to drive the third transmission wheel 51 to move. The first pushing member 22 is connected with the second belt 53.

[0054] The second driving member 50 comprises but is not limited to a driving motor.

[0055] As a preferred embodiment, the first pushing member 22 comprises a first connecting plate 220, a first pushing block 221 and an elastic member 222. The first connecting plate 220 is fixedly connected with the second belt 53. The first pushing block 221 is elastically connected with the first connecting plate 220 through the elastic member 222. The elastic member 222 comprises but is not limited to a torsion spring. In this way, the first pushing member 22 can avoid damaging the sample rack when pushing the sample rack, and the pushing force can also be guaranteed.

[0056] Further, the second pushing assembly further comprises a third driving member 32 arranged on the support base 10 and a third transmission mechanism, the third transmission mechanism comprises a fifth transmission wheel 33, a sixth transmission wheel 34 and a third belt 35, the fifth transmission wheel 33 and the sixth transmission wheel 34 are arranged in the first direction, the third belt 35 is transmissionally connected to the fifth transmission wheel 33 and the sixth transmission wheel 34, and the output end of the third driving member 32 is connected to the fifth transmission wheel 33 so as to drive the fifth transmission wheel 33 to move.

[0057] In order to guide and limit the movement of the first pushing member 22, the first pushing assembly further comprises a first guide rail 60 arranged on the support base 10 and a first sliding block slidingly arranged on the first guide rail 60, and the first guide rail 60 is arranged in the first direction, and the first pushing member 22 is connected to the first sliding block.

[0058] Correspondingly, in order to guide and limit the movement of the second pushing member 31, the second pushing assembly 31 further comprises a second guide rail 61 and a second sliding block slidingly connected to the second guide rail 61, the support base 10 is provided with a mounting bracket 12, and the second guide rail 61 is assembled on the mounting bracket 12, and the second guide rail 61 is arranged in the first direction, and the second pushing member 31 is connected to the second sliding block.

[0059] As a preferred embodiment, the second pushing member 31 comprises a second connecting plate 310 and a second pushing block 311, the second connecting plate 310 is connected to the second sliding block, and a third guide rail 62 is further arranged on the second connecting plate 310 and arranged in the second direction, so that the second pushing block 311 can move in the first direction and the second direction. Embodiment two

[0060] The utility model further discloses a kind of conveying equipment, including transfer mechanism and the conveying device as described in embodiment one, and the transfer mechanism is used to transfer sample rack to the conveying device.

[0061] In the description of the utility model, it needs to be understood that, term "first", "second" is only used for the purpose of description, and can not be understood as indicating or suggesting relative importance or implicitly indicating the number of indicated technical features. Therefore, the feature limited by "first", "second" can be explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless there is explicit specific limitation.

[0062] In the utility model, unless another definite provision and limitation, the term " install " " link " " connect " " fixed " and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can pass through intermediate medium indirectly connect;Can be two element inside's intercommunication or two element's interaction relation. For ordinary skilled person in the art, the above-mentioned term can be understood according to the specific meaning in the utility model of concrete situation.

[0063] Obviously, the above embodiments are only examples for clearly illustrating, not limiting the embodiments. For ordinary skilled person in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and can not be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A transfer device for interactive transfer of a sample holder, characterized by: The application relates to a sample rack feeding and recycling device. The device comprises a supporting unit, a feeding unit, a recycling unit and a detecting unit. The supporting unit comprises a supporting base. The feeding unit comprises a feeding channel, a first driving assembly and a first pushing assembly. The feeding channel is arranged on the supporting base along a first direction. The feeding channel is provided with a first conveying belt.

2. A conveyor as claimed in claim 1, wherein: The first driving assembly is arranged on the supporting base and connected with the first conveying belt to drive the first conveying belt.

3. The conveyor of claim 1, wherein: The first pushing assembly comprises a first pushing member movably arranged on the supporting base.

4. The conveyor of claim 1, wherein: The first pushing member is driven to move along the first direction to push a sample rack arranged on the first conveying belt.

5. The delivery device of claim 1, wherein: The recycling unit comprises a recycling channel and a second pushing assembly.

6. The delivery device of claim 1, wherein: The recycling channel is arranged on the supporting base along the first direction. The second pushing assembly comprises a second pushing member movably arranged on the supporting base. The second pushing member is driven to move along the first direction to push a sample rack arranged on the recycling channel. The recycling channel is arranged along a second direction apart from the feeding channel. The second direction is perpendicular to the first direction. The second pushing member is also driven to move along the second direction to avoid the sample rack. The detecting unit comprises a first detecting assembly and a second detecting assembly. The first detecting assembly is used to detect the position of the sample rack on the first conveying belt. The second detecting assembly is used to detect the position of the sample rack on the recycling channel. The control unit is connected with the feeding unit, the recycling unit and the detecting unit. The control unit collects signals from the detecting unit to control the feeding unit and the recycling unit. The first detecting assembly comprises two first sensors arranged on the supporting base. The two first sensors are arranged near the two ends of the first conveying belt. The second detecting assembly comprises two second sensors arranged on the supporting base. The two second sensors are arranged near the two ends of the recycling channel. The detecting unit further comprises a first reset detecting sensor arranged near the first conveying belt. The first reset detecting sensor is arranged at one end of the first conveying belt. The first reset detecting sensor is used to detect the position of the first pushing member on the first conveying belt to control the action of the first pushing member. The detecting unit further comprises a second reset detecting sensor arranged at one end of the recycling channel. The second reset detecting sensor is used to detect the position of the second pushing member on the recycling channel to control the action of the second pushing member. The first driving assembly further comprises a first driving member and a first transmission mechanism arranged on the supporting base. The first transmission mechanism comprises a first transmission wheel, a second transmission wheel and a first belt. The first transmission wheel and the second transmission wheel are arranged apart along a height direction. The first belt is transmissionally connected with the first transmission wheel and the second transmission wheel. The output end of the first driving member is connected with the first transmission wheel to drive the first transmission wheel.

7. The delivery device of claim 1, wherein: The first pushing assembly further comprises a second driving member and a second transmission mechanism, the second transmission mechanism comprises a third transmission wheel, a fourth transmission wheel and a second belt, the third transmission wheel and the fourth transmission wheel are arranged at intervals along the first direction, the second belt is in transmission connection with the third transmission wheel and the fourth transmission wheel, and the output end of the second driving member is connected with the third transmission wheel to drive the third transmission wheel to move.

8. A conveyor as claimed in claim 7, wherein: The first pushing member is connected with the second belt.

9. The delivery device of claim 1, wherein: The second pushing assembly further comprises a third driving member and a third transmission mechanism, the third transmission mechanism comprises a fifth transmission wheel, a sixth transmission wheel and a third belt, the fifth transmission wheel and the sixth transmission wheel are arranged at intervals along the first direction, the third belt is in transmission connection with the fifth transmission wheel and the sixth transmission wheel, and the output end of the third driving member is connected with the fifth transmission wheel to drive the fifth transmission wheel to move.

10. A conveyor as claimed in any one of claims 1 to 9, wherein: The first pushing assembly further comprises a first guide rail and a first sliding block slidingly arranged on the first guide rail, the first guide rail is arranged in extension along the first direction, and the first pushing member is connected with the first sliding block; the second pushing assembly further comprises a second guide rail and a second sliding block slidingly connected with the second guide rail, the second guide rail is arranged in extension along the first direction, and the second pushing member is connected with the second sliding block.

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