CN113341507A

CN113341507A - Coupling device of photoelectronic device

Info

Publication number: CN113341507A
Application number: CN202110465429.8A
Authority: CN
Inventors: 付金勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-09-03

Abstract

The invention discloses a coupling device of an optoelectronic device, which comprises a lifting body, a top frame, a base, a lower clamp body, an operation box and a support frame, wherein the lifting body is arranged at the central position of the top frame, the lifting body is in clearance fit with the top frame, the support frame is arranged at the junction of the operation box and the top frame and is embedded with the operation box, the lower clamp body is arranged on the base and is movably connected with the base, the operation box is provided with an operator, a frame beam, a baffle box, an upper clamp, a telescopic rod and a driving block, the frame beam is arranged in the baffle box and is embedded with the baffle box, the driving blocks are arranged on two sides of the frame beam, the clamping body can clamp a tail fiber body in a tail fiber groove, the fixing of the connection body in the rear groove of a lead is realized, the tail fiber is prevented from being pulled, an adjuster can clamp and position the tail fiber at the exposed end, the outer tail fiber is not easy to be pulled, and the tail fiber in the tail fiber groove is pulled, causing the pigtail to be disconnected from the patch cord.

Description

Coupling device of photoelectronic device

Technical Field

The invention relates to the field of photoelectrons, in particular to a coupling device of a photoelectronic device.

Background

The optoelectronic device is a key and core part of the optoelectronic technology, is the leading research field of modern optoelectronic technology and microelectronic technology, is an important component of information technology, and the coupling device of the optoelectronic device is a phenomenon that the input and the output of two or more than two circuit elements or electric networks are closely matched and mutually influenced, and energy is transmitted from one side to the other side through interaction;

when the coupling device of the optoelectronic device is coupled, the tail fiber needs to be inserted and connected with a line of equipment, the other end of the tail fiber is exposed outside and connected with an external detector, the tail fiber is easy to twist and accumulate in the movable space of the tail fiber groove in the wire guiding process due to the overlarge movable space of the tail fiber groove of the equipment, and the equipment can drag the external tail fiber when in work, so that the tail fiber in the groove is dragged to cause the tail fiber to be separated from the connection with a jumper wire.

Disclosure of Invention

Aiming at the defects of the prior art, the invention is realized by the following technical scheme: a coupling device of a photoelectronic device structurally comprises a lifting body, a top frame, a base, a lower clamp body, an operation box and a support frame, wherein the lifting body is arranged at the central position of the top frame, the lifting body is in clearance fit with the top frame, the support frame is arranged at the junction of the operation box and the top frame, the support frame is embedded with the operation box, the lower clamp body is arranged on the base, and the lower clamp body is movably connected with the base;

the operating box is provided with an operator, a frame beam, a baffle box, an upper clamp, a telescopic rod and a driving block, the frame beam is arranged in the baffle box and is embedded with the baffle box, the driving blocks are arranged on two sides of the frame beam and are connected with the frame beam, the telescopic rod is arranged on the driving block and is in clearance fit with the driving block, the upper clamp is arranged at the center end of the frame beam and is movably clamped with the frame beam, the operator is arranged on the frame beam, and the operator is connected with the frame beam.

As a further optimization of the technical scheme, the manipulator is provided with a stabilizer, a regulator, a locking cover, a connecting cylinder, a shell and a guide rod, the regulator is arranged on the guide rod and movably clamped with the guide rod, the stabilizer is arranged on the guide rod, the guide rod is connected with the stabilizer, the locking cover is arranged on the shell and is in clearance fit with the shell, the connecting cylinder is arranged inside the shell, and the connecting cylinder is embedded with the shell.

As a further optimization of the technical scheme, the stabilizer is provided with a tail fiber groove, an extension cavity, a displacement channel, a puller, a sandwich board, an extension body and a sandwich body, wherein the tail fiber groove is internally provided with the displacement channel, the displacement channel is movably connected with the tail fiber groove, the displacement channel is provided with the puller, the puller is slidably connected with the displacement channel, the extension cavity is provided with the extension body, the extension body is embedded with the extension cavity, the sandwich board is installed on the extension cavity, the sandwich board is movably connected with the extension cavity, the sandwich body is installed inside the sandwich board and is connected with the sandwich board, the puller is embedded on the displacement channel through a sliding shaft body, the sandwich board is provided with a hollow cavity, the hollow cavity surface of the sandwich board is provided with a soft rubber layer, the extension cavity is provided with a sliding rod, two sides of the extension body are provided with connecting columns, and the connecting columns of the extension body run through the sliding rod of the extension cavity, the extension body is equipped with the rotation cylinder with the link of plywood.

As a further optimization of the technical scheme, the clamping body is an arc shaft body, connecting shafts are arranged on two sides of the clamping body, the connecting shafts of the clamping body are embedded inside a movable cavity, a sliding track is arranged inside the movable cavity of the clamping body, the connecting shafts of the clamping body and the arc shaft body are movably connected through the movable shaft, the middle position of the arc shaft body of the clamping body is formed by connecting the connecting shaft bodies, and an arc bulge block is arranged on the arc shaft body of the clamping body.

As a further optimization of the technical scheme, the puller is provided with a reinforcing block, a rotating shaft, a moving body, a moving cavity and a rotating block, the moving body is arranged in the moving cavity and is connected with the moving body in a sliding manner, the rotating block is arranged on the moving body and is connected with the moving body, the reinforcing block is arranged on each of two sides of the rotating shaft and is movably connected with the rotating shaft, a connecting column is arranged in the moving body, sliding grooves are formed in two sides of the connecting column of the moving body, sliding shafts are arranged on two sides of the rotating block and are slidably connected with the sliding grooves, the reinforcing block is an arc-shaped shaft body, a colloid layer is arranged on the surface of the reinforcing block, an arc-shaped groove is formed in the reinforcing block, and the rotating block is movably connected with the rotating shaft through the moving shaft.

As a further optimization of this technical scheme, the axis of rotation is the arc plate, the central point of axis of rotation puts and is equipped with movable chamber, be equipped with the slip track on the movable chamber wall body of axis of rotation, be equipped with protruding piece on the movable chamber of axis of rotation, and the inside rubber block that is equipped with of protruding piece, the inside of axis of rotation is equipped with the circular arc movable block, the movable block of axis of rotation passes through the gomphosis of slip plate on the slip track, the slip plate of axis of rotation is equipped with the circular arc connecting block towards one side of protruding piece.

As a further optimization of the technical scheme, the regulator is provided with an attaching block, a device body, an assembling block, a squeezer and a traction body, the attaching block is provided with the squeezer, the attaching block is movably connected with the squeezer, both sides of the attaching block are provided with the traction bodies, the traction bodies are connected with the attaching block, the traction bodies are arranged inside the assembling block and are in clearance fit with the assembling block, the device body is provided with the assembling block, the assembling block is movably clamped with the device body, the device body is provided with a hollowed-out opening, two hollowed-out holes of the device body are a group, the hollowed-out openings of the device body are respectively arranged on both sides of the attaching block, the width of the hollowed-out opening of the attaching block is larger than that of the traction body, the traction body is of a linear structure, the assembling block is provided with an opening, the traction body penetrates through the assembling block, and the other end of the penetrating line body is provided with a connecting plate, the traction body is provided with a circular hollow-out opening, and one side of the device body facing the line body connecting plate is provided with a threaded notch.

As a further optimization of the technical scheme, the squeezer is provided with a mounting plate, a turnover plate, a contact block and a turnover shaft, the turnover shaft is provided with a turnover plate, the turnover plate is in clearance fit with the turnover shaft, the turnover plate is provided with a mounting plate, the mounting plate is in clearance fit with the turnover plate, the contact block is mounted on the turnover plate, the turnover plate is movably connected with the contact block, the turnover plate is sleeved on the turnover shaft through a cylindrical sleeve ring, connecting blocks are arranged on two sides of the mounting plate, the connecting block of the mounting plate is provided with a groove, the mounting plate is embedded on the groove through a connecting column body, a spiral column body formed by spring copper wires is arranged between the mounting plate and the turnover plate, the contact block is an arc connecting block, the contact block is provided with a convex block and a concave block, and the turnover plate is of a bent arched structure.

Advantageous effects

Compared with the prior art, the coupling device of the optoelectronic device has the following advantages:

1. the rotating shaft can be buckled on the connecting plate surface of the tail fiber connector and the connecting wire body in a propping manner, and the tail fiber is driven to move by the sliding of the rotating shaft, so that the lead of the tail fiber is realized, the lead of the tail fiber is driven by the driving force, and the tail fiber cannot be twisted in the lead process and is accumulated in a tail fiber groove.

2. The clamping body can clamp the tail fiber body in the tail fiber groove, the fixing of the connecting body in the wire rear groove is realized, the tail fiber is prevented from being pulled, the regulator can clamp and position the tail fiber at the exposed end, the external tail fiber is not easy to be pulled, and the tail fiber in the tail fiber groove is pulled, so that the tail fiber is separated from the connection with the jumper wire.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic diagram of the overall structure of a coupling device of an optoelectronic device according to the present invention.

Fig. 2 is a schematic structural diagram of the operation box of the invention.

Fig. 3 is a schematic structural diagram of the manipulator of the present invention.

Fig. 4 is a schematic structural diagram of the stabilizer of the present invention.

Fig. 5 is a schematic view of the structure of the puller of the present invention.

Fig. 6 is a schematic view of the regulator of the present invention.

FIG. 7 is a schematic view of the extruder of the present invention

In the figure: the lifting device comprises a lifting body 1, a top frame 2, a base 3, a lower clamp body 4, an operation box 5, a support frame 6, an operator 5a, a frame beam 5b, a baffle box 5c, an upper clamp 5d, an expansion rod 5e, a driving block 5f, a stabilizer a1, an adjuster a2, a locking cover a3, a connecting cylinder a4, a shell a5, a guide rod a6, a tail fiber groove a11, an extension cavity a12, a displacement channel a13, a puller a14, a clamping plate a15, an extension body a16, a clamping body a17, a reinforcing block 141, a rotating shaft 142, a moving body 143, a moving cavity 144, a rotating block 145, a fitting block a21, a body a22, an assembling block a23, a squeezer a24, a pulling body a25, a mounting plate 241, a turnover plate 242, a contact block and a turnover shaft 244.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easy to understand, the following description and the accompanying drawings further illustrate the preferred embodiments of the invention.

Example one

Referring to fig. 1-5, a coupling device of an optoelectronic device structurally includes a lifting body 1, a top frame 2, a base 3, a lower clamp 4, an operation box 5, and a support frame 6, wherein the lifting body 1 is disposed at a center position of the top frame 2, the lifting body 1 is in clearance fit with the top frame 2, the support frame 6 is disposed at a junction of the operation box 5 and the top frame 2, the support frame 6 is embedded with the operation box 5, the lower clamp 4 is disposed on the base 3, and the lower clamp 4 is movably connected with the base 3;

the operating box 5 is provided with an operator 5a, a frame beam 5b, a baffle box 5c, an upper clamp 5d, an expansion link 5e and a driving block 5f, the frame beam 5b is arranged inside the baffle box 5c, the frame beam 5b is embedded with the baffle box 5c, the two sides of the frame beam 5b are respectively provided with the driving block 5f, the driving block 5f is connected with the frame beam 5b, the expansion link 5e is arranged on the driving block 5f, the expansion link 5e is in clearance fit with the driving block 5f, the center end of the frame beam 5b is provided with the upper clamp 5d, the upper clamp 5d is movably clamped with the frame beam 5b, the frame beam 5b is provided with the operator 5a, and the operator 5a is connected with the frame beam 5b to realize electronic coupling.

The manipulator 5a is provided with a stabilizer a1, an adjustor a2, a locking cover a3, a connecting cylinder a4, a housing a5 and a guide rod a6, the guide rod a6 is provided with the adjustor a2, the adjustor a2 is movably clamped with the guide rod a6, the stabilizer a1 is installed on the guide rod a6, the guide rod a6 is connected with the stabilizer a1, the housing a5 is provided with the locking cover a3, the locking cover a3 is in clearance fit with the housing a5, the connecting cylinder a4 is arranged inside the housing a5, and the connecting cylinder a4 is embedded with the housing a5 to realize the connection of pigtails.

The stabilizer a1 is provided with a pigtail groove a1, an extension cavity a1, a displacement channel a1, a puller a1, a sandwich plate a1, an extension body a1 and a sandwich body a1, the displacement channel a1 is arranged in the pigtail groove a1, the displacement channel a1 is movably connected with the pigtail groove a1, the puller a1 is arranged on the displacement channel a1, the puller a1 is slidably connected with the displacement channel a1, the extension body a1 is arranged on the extension cavity a1, the extension body a1 is embedded with the extension cavity a1, the sandwich plate a1 is movably connected with the extension cavity a1, the sandwich plate a1 is arranged in the sandwich plate a1, the sandwich plate a1 is connected with the sandwich plate a1, the puller a1 is embedded on the displacement channel a1 through a sliding shaft body, the hollow rod a of the sandwich plate a1 is arranged on the surface of the sandwich plate a1, and the hollow rod a1 a hollow rod of the slide plate 1 is arranged on the surface of the sandwich plate a 1. The extension body a16 both sides are equipped with the spliced pole, the spliced pole of extension body a16 runs through the slide bar of extension chamber a12, the link of extension body a16 and plywood a15 is equipped with the rotation cylinder, realizes the clamp of tail fiber.

The clamping body a17 is an arc shaft body, connecting shafts are arranged on two sides of the clamping body a17, the connecting shafts of the clamping body a17 are embedded inside a movable cavity, a sliding track is arranged inside the movable cavity of the clamping body a17, the connecting shafts of the clamping body a17 are movably connected with the arc shaft body through the movable shafts, the middle position of the arc shaft body of the clamping body a17 is formed by connecting the connecting shaft bodies, an arc bulge block is arranged on the arc shaft body of the clamping body a17, and the tail fiber is prevented from being torn through clamping of the tail fiber.

The puller a14 is provided with a reinforcing block 141, a rotating shaft 142, a moving body 143, a moving cavity 144 and a rotating block 145, a moving body 143 is arranged in the moving cavity 144, the moving body 143 is connected with the moving cavity 144 in a sliding way, the moving body 143 is provided with a rotating block 145, the rotating block 145 is connected with the moving body 143, reinforcing blocks 141 are respectively arranged at both sides of the rotating shaft 142, the reinforcing blocks 141 are movably connected with the rotating shaft 142, a connecting column is arranged inside the moving body 143, sliding grooves are arranged on two sides of the connecting column of the moving body 143, sliding shafts are arranged on two sides of the rotating block 145, the sliding shafts of the rotating block 145 are connected with the sliding grooves in a sliding manner, the reinforcing block 141 is an arc-shaped shaft body, a colloid layer is arranged on the surface of the reinforcing block 141, an arc-shaped groove is arranged on the reinforcing block 141, the rotating block 145 is movably connected with the rotating shaft 142 through a movable shaft, so that guiding of the tail fiber is realized.

The rotating shaft 142 is an arc-shaped plate, a movable cavity is arranged at the center of the rotating shaft 142, a sliding track is arranged on the wall body of the movable cavity of the rotating shaft 142, a protruding block is arranged on the movable cavity of the rotating shaft 142, a rubber block is arranged inside the protruding block, an arc-shaped movable block is arranged inside the rotating shaft 142, the movable block of the rotating shaft 142 is embedded on the sliding track through the sliding plate, an arc-shaped connecting block is arranged on one side, facing the protruding block, of the sliding plate of the rotating shaft 142, and tail fibers are further clamped through a rotating structure.

When the locking cover a3 is rotated, the locking cover a3 pulls the connecting cylinder a4 in the housing a5, so that the connecting block in the upper clamp 5d rotates, the locking of the device of the upper clamp 5d is realized, the pigtail penetrates from the pigtail groove a11, when the pigtail slides to the puller a14, the moving body 143 slides and extends along the moving cavity 144, the sliding shaft on the rotating block 145 slides along the sliding groove of the moving body 143, the re-extension of the rotating block 145 can be realized, the rotating shaft 142 rotates along the movable shaft between the rotating block 145, so that the abutting surface of the rotating shaft 142 is clamped on the pigtail connector contact plate surface, the puller a14 slides along the displacement channel a13, so that the pigtail is pulled, the wire is conducted, after the pigtail wire is conducted, the reinforcing block 141 rotates along the movable shaft, the pigtail is clamped and extends out, the arc connecting block on the rotating shaft 142 extends out to clamp the pigtail, the clamping and abutting force is increased, the connecting column of the extension body a16 slides along the sliding rod on the extension cavity a12, a guide rod a6 extends out to be matched with a connecting line body of the tail fiber, the clamping plate a15 rotates along the extension body a16, so that the clamping plate a15 faces the connecting line of the tail fiber, the tail fiber connecting line is clamped and extruded, connecting columns on two sides of the clamping body a17 can slide along the sliding cavity, the clamping body a17 is pushed to rotate, the clamping body a17 is further clamped and fixed, and the tail fiber is prevented from being pulled.

Example two

Referring to fig. 1-7, a coupling device of an optoelectronic device structurally includes a lifting body 1, a top frame 2, a base 3, a lower clamp 4, an operation box 5, and a support frame 6, wherein the lifting body 1 is disposed at a center position of the top frame 2, the lifting body 1 is in clearance fit with the top frame 2, the support frame 6 is disposed at a junction of the operation box 5 and the top frame 2, the support frame 6 is embedded with the operation box 5, the lower clamp 4 is disposed on the base 3, and the lower clamp 4 is movably connected with the base 3;

The adjuster a2 is provided with an attaching block a21, a body a22, an assembling block a23, a squeezer a23 and a pulling body a23, the attaching block a23 is provided with the squeezer a23, the attaching block a23 is movably connected with the squeezer a23, two sides of the attaching block a23 are respectively provided with the pulling body a23, the pulling body a23 is connected with the attaching block a23, the pulling body a23 is arranged in the assembling block a23, the pulling body a23 is in clearance fit with the assembling block a23, the body a23 is provided with the assembling block a23, the assembling block a23 is movably engaged with the body a23, the body a23 is provided with a hollow hole, two hollow holes of the body a23 are a group, the hollow holes of the body a23 are respectively arranged at two sides of the attaching block a23, the width of the opening of the attaching block a23 is larger than that of the body a23 a, the pulling body a pulling body 23 a is provided with a linear opening, the pulling body 23 a pulling body 23, and the pulling body 23 a pulling body 23 is provided with a opening, and the other end of the penetrating wire body is provided with a connecting plate with a space larger than the opening, the traction body a25 is provided with a circular hollow opening, and one side of the device body a22 facing the connecting plate of the wire body is provided with a threaded notch to clamp the exposed end of the tail fiber.

The extruder a24 is provided with a mounting plate 241, a turnover plate 242, a contact block 243 and a turnover shaft 244, the turnover plate 242 is arranged on the turnover shaft 244, the turnover plate 242 is in clearance fit with the turnover shaft 244, the mounting plate 241 is arranged on the turnover plate 242, the mounting plate 241 is in clearance fit with the turnover plate 242, the contact block 243 is arranged on the turnover plate 242, the turnover plate 242 is movably connected with the contact block 243, the turnover plate 242 is sleeved on the turnover shaft 244 through a cylindrical sleeve ring, connecting blocks are arranged on two sides of the mounting plate 241, a groove is arranged on the connecting block of the mounting plate 241, the mounting plate 241 is embedded on the groove through a connecting cylinder, a spiral cylinder composed of spring copper wires is arranged between the mounting plate 241 and the turnover plate 242, the contact block 243 is an arc connecting block, rubber wires are filled in the contact block, and a convex block and a concave block are arranged on the contact block 243, the turning plate 242 has a curved arch structure, and the pigtails are clamped by an extrusion combination structure.

An adjustor a2 is installed on the basis of the first embodiment, an external tail fiber passes through an attaching block a21, then a pulling body a25 is pulled, the pulling body a25 slides along an assembling block a23, so that the distance between the attaching block a21 and a body a22 is reduced, the external tail fiber is attached to the tail fiber, the external tail fiber is clamped between the attaching block a21 and the body a22, a squeezer a24 rotates along a movable shaft between the body a22, a connecting column of a turnover plate 242 is turned over along a turnover shaft 244, so that the turnover plate 242 is in contact with the edge end of the tail fiber, a connecting shaft of the installing plate 241 rotates along connecting blocks on two sides, the contact block 243 squeezes the tail fiber, the clamping force is increased through squeezing force, and the contact block 243 is of an arc-shaped structure, and the tail fiber is not damaged during squeezing.

While there have been shown and described what are at present considered the fundamental principles of the invention, the essential features and advantages thereof, it will be understood by those skilled in the art that the present invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but rather, is capable of numerous changes and modifications in various forms without departing from the spirit or essential characteristics thereof, and it is intended that the invention be limited not by the foregoing descriptions, but rather by the appended claims and their equivalents.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A coupling device for an optoelectronic device, comprising: the structure of the lifting device comprises a lifting body (1), a top frame (2), a base (3), a lower clamp body (4), an operation box (5) and a support frame (6), wherein the lifting body (1) is arranged at the center of the top frame (2), the support frame (6) is embedded with the operation box (5), and the lower clamp body (4) is arranged on the base (3);

the operation box (5) is provided with an operator (5a), a frame beam (5b), a baffle box (5c), an upper clamp (5d), an expansion link (5e) and a driving block (5f), the frame beam (5b) is embedded with the baffle box (5c), the driving blocks (5f) are arranged on two sides of the frame beam (5b), the expansion link (5e) is in clearance fit with the driving block (5f), the upper clamp (5d) is arranged at the center end of the frame beam (5b), and the operator (5a) is connected with the frame beam (5 b).

2. A coupling device for an optoelectronic device according to claim 1, wherein: the manipulator (5a) is provided with a stabilizer (a1), a regulator (a2), a locking cover (a3), a connecting cylinder (a4), a shell (a5) and a guide rod (a6), the regulator (a2) is movably clamped with the guide rod (a6), the stabilizer (a1) is installed on the guide rod (a6), the locking cover (a3) is in clearance fit with the shell (a5), and the connecting cylinder (a4) is arranged inside the shell (a 5).

3. A coupling device for an optoelectronic device according to claim 2, wherein: stabilizer (a1) is equipped with tail fiber groove (a11), extension chamber (a12), displacement way (a13), draws and moves ware (a14), sandwich panel (a15), extension body (a16), clamping body (a17), the inside of tail fiber groove (a11) is equipped with displacement way (a13), draw and move ware (a14) and displacement way (a13) sliding connection, be equipped with extension body (a16) on extension chamber (a12), sandwich panel (a15) and extension chamber (a12) swing joint, the internally mounted of sandwich panel (a15) has clamping body (a 17).

4. A coupling device for an optoelectronic device according to claim 3, wherein: the clamping body (a17) is an arc shaft body, and connecting shafts are arranged on two sides of the clamping body (a 17).

5. A coupling device for an optoelectronic device according to claim 3, wherein: the puller (a14) is provided with a reinforcing block (141), a rotating shaft (142), a moving body (143), a moving cavity (144) and a rotating block (145), the moving body (143) is arranged in the moving cavity (144), the rotating block (145) is connected with the moving body (143), and the reinforcing block (141) is arranged on each of two sides of the rotating shaft (142).

6. A coupling arrangement for an optoelectronic device according to claim 5, wherein: the rotating shaft (142) is an arc-shaped plate, and a movable cavity is arranged in the center of the rotating shaft (142).

7. A coupling device for an optoelectronic device according to claim 2, wherein: the adjuster (a2) is provided with a joint block (a21), a device body (a22), an assembly block (a23), a squeezer (a24) and a traction body (a25), wherein the squeezer (a24) is arranged on the joint block (a21), the traction body (a25) is connected with the joint block (a21), the traction body (a25) is arranged in the assembly block (a23), and the assembly block (a23) is movably clamped with the device body (a 22).

8. A coupling device for an optoelectronic device according to claim 7, wherein: the squeezer (a24) is provided with a mounting plate (241), a turnover plate (242), a contact block (243) and a turnover shaft (244), the turnover plate (242) is arranged on the turnover shaft (244), the mounting plate (241) is in clearance fit with the turnover plate (242), and the contact block (243) is mounted on the turnover plate (242).