TWI718917B - Locking structure for take-up device - Google Patents

Abstract

A locking structure for a wire take-up device includes: an operating rod with two protrusions extending outward and reverse; a stop seat, which is arranged on the fixing plate of the wire take-up device, has a shaft hole and two locking grooves, and the operating rod penetrates The shaft hole and the perforation of the fixing plate; the locking piece has a positioning block fixed to the operating rod and a catching piece fixed to the positioning block and having an external gear part; an elastic element, both ends abut against the locking piece and the stop Seat; shaft sleeve, fixed on the fixed plate and sleeved on the locking part; the locked part, rotatably provided on the shaft sleeve and fixed on the wire wheel of the wire take-up device, and has a clamping hole and an internal gear part; when The operating lever is in the locked position, the two protrusions interfere with the two locking grooves, and the external gear part is engaged with the internal gear part; when the operating rod is in the release position, the two protrusions are pushed forward by the stop seat surface, and the external gear part is not engaged Internal gear.

Description

Locking structure for take-up device

The present invention relates to a wire reel, and particularly refers to a locking structure for a wire take-up device.

The conventional wire take-up device is mainly composed of a support frame and a wire wheel rotatably arranged on the support frame by a rotating shaft, and has the functions of winding and unwinding.

However, in the aforementioned prior art, the wire wheel is in a freely rotatable state. When the pipeline is wound around the wire wheel and the storage is completed, the wire wheel is easily affected by external forces and rotates, causing part of the pipeline to separate from the wire wheel or be wound up. Not tight, resulting in the pipeline may be damaged by other heavy objects or people being pressed or stepped on. In addition, when the user pulls out the required length of the pipeline from the conventional wire take-up device, the wire reel is also easily affected by external forces. Rotate to make the pipeline detached from the reel too long and partially drop to the ground. The user must always pay attention to avoid damaging the pipeline due to stepping, which will cause inconvenience to the user's operation.

In view of the above-mentioned deficiencies, the main purpose of the present invention is to provide a locking structure for a wire take-up device, which can be operated by a user to limit the position of the wire wheel or not interfere with the wire wheel.

In order to achieve the above-mentioned object, the present invention provides a locking structure for a wire take-up device to be installed in a wire take-up device. The wire take-up device has a frame, a fixing plate, and a wire wheel. The fixing plate has a perforation. The wire reel is rotatably arranged on the frame by a rotating shaft, and the locking structure for the wire take-up device includes: an operating rod with two protrusions extending in the radial direction and opposite directions; and a stop seat , Arranged on the fixing plate and located in front of the fixing plate, the stop seat has a shaft hole penetrating forward and backward to communicate with the perforation, and has two locking grooves recessed from the front end to the rear, and the two locking grooves are located on the shaft The two sides of the hole are open toward one end of the shaft hole, the operating rod passes through the shaft hole and the perforation; a locking piece has a positioning block and a latching piece, the positioning block is fixed on the operating rod and Located at its rear end, the outer surface of the locking member has an external gear portion, the locking member is fixed to the positioning block and located behind the positioning block; an elastic element, both ends of which abut against the locking member and the stop, respectively The retaining seat, the elastic restoring force of which is to push the locking member backwards; a shaft sleeve which penetrates back and forth and is fixed on the fixing plate and sleeves on the locking member; and a locked member with a snap hole penetrating forward and backward , The locked member has an internal gear portion located on the inner peripheral wall of the clamping hole, the locked member is fixed on the wire wheel and rotates with the wire wheel, and the locked member is rotatably provided on the shaft sleeve; Wherein, the operating lever is used for the user to operate and rotate to move between a locked position and a released position. When the operating lever is located in the locked position, the elastic element pushes the locking member together with the operating lever to move backwards. The two projections interfere with the two locking grooves, and the external gear part is engaged with the internal gear part; when the operating lever is not in the locking position, that is, in the release position, the two projections are blocked by the The surface of the seat is pushed forward so that the external gear part is disengaged and does not engage with the internal gear part.

Preferably, the stop seat further has two positioning grooves recessed backward from the front end thereof, the two positioning grooves are open toward one end of the shaft hole, and the depth of the two positioning grooves in the front-rear direction makes the two convex When the block is located in the two positioning grooves, the external gear portion of the locking member will not engage with the internal gear portion, and the two groove wall surfaces of each positioning groove gradually expand forward and outward.

Preferably, the two locking grooves and the two positioning grooves are equidistant from each other and are arranged at an annular interval relative to the shaft hole.

Preferably, the front end of the stop base has a front end surface, the stop base protrudes forward from the front end surface with a boss, and the two positioning grooves are arranged on the boss.

Preferably, the wall surfaces of the two grooves of each of the locking grooves located on the boss gradually expand forward and outward.

Preferably, the operating rod further has a first shoulder extending outward in the radial direction, and the two protrusions protrude from two opposite outer sides of the first shoulder; the stop seat further has a rear end from the front end to the rear A circular groove is recessed, the shaft hole penetrates the groove bottom of the circular groove, and when the operating rod is in the locking position, the first shoulder is located in the circular groove.

Preferably, the positioning block further has a second shoulder protruding outward; the front and rear openings of the sleeve have a large front and a small diameter and form a stepped surface on the inner wall of the peripheral wall; wherein, when the operating rod is located In the release position, the second shoulder is located in front of the step surface but does not touch; when the operating rod is in the locked position, the second shoulder presses against the shaft sleeve.

Preferably, it further includes a turntable arranged at the front end of the operating rod.

In order to describe the structure and features of the present invention in detail, the following preferred embodiments are given in conjunction with the illustrations, in which:

As shown in Figures 1 to 8, the first preferred embodiment of the present invention provides a locking structure 10 for a wire take-up device, which is used to be installed on a wire take-up device 94, which has a frame Body 95, a fixed plate 96, and a wire wheel 97 for winding a flexible cable 99. The fixed plate 96 has a perforation 961. The wire wheel 97 is rotatably arranged on the frame by a rotating shaft 98 95. For the convenience of schematic representation, the present invention only shows the flexible cable 99 in FIG. 1 and FIG. 2, and does not show it in other drawings. The locking structure 10 for the wire take-up device includes: an operating rod 11, a stop seat 21, a locking member 31, an elastic element 41, a shaft sleeve 51, a locked member 61 and a turntable 71.

Please refer to Fig. 3, the operating rod 11 has two protrusions 12 extending radially outward and inversely.

The stop seat 21 is arranged on the fixed plate 96 and is located in front of the fixed plate 96. The stop seat 21 has a shaft hole 22 penetrating forward and backward to communicate with the perforation 961, and has two locks recessed from the front end to the rear. The two locking grooves 23 are located on both sides of the shaft hole 22 and are open toward one end of the shaft hole 22, the operating rod 11 passes through the shaft hole 22 and the perforation 961, and the stop seat 21 is located The surface of the shaft hole 22 is attached to the shaft of the operating rod 11.

Please refer to FIG. 4, the locking member 31 has a positioning block 32 and a latching member 33. The positioning block 32 is fixed to the operating rod 11 and located at the rear end thereof. The latching member 33 has an external gear on its outer surface. 331, the latch 33 is fixed to the positioning block 32 and located behind the positioning block 32.

The two ends of the elastic element 41 abut against the locking member 31 and the stop seat 21 respectively, and the elastic restoring force is to push the locking member 31 backward. In actual implementation, the elastic element 41 is a compression spring, the compression spring is sleeved on the operating rod 11, and the two ends along the direction of the elastic restoring force abut against the locking member 31 and the stop seat 21 respectively.

The shaft sleeve 51 penetrates back and forth and is fixed on the fixing plate 96 and sleeved on the locking member 31.

The locked member 61 has a locking hole 62 penetrating forward and backward, the locked member 61 has an internal gear portion 63 located on the inner peripheral wall of the locking hole 62, and the locked member 61 is fixed on the wire wheel 97 and As the wire wheel 97 rotates, the locked member 61 is rotatably disposed on the shaft sleeve 51.

The turntable 71 is provided at the front end of the operating rod 11.

Wherein, the operating lever 11 is used for the user to operate and rotate to move between a locked position P1 and a release position P2. When the operating lever 11 is in the locked position P1, the elastic element 41 pushes the locking member 31 together with The operating lever 11 moves backward to cause the two protrusions 12 to interfere with the two locking grooves 23, and the external gear portion 331 is engaged with the internal gear portion 63; when the operating lever 11 is not located at the locking position P1, that is, At the release position P2, the two protrusions 12 are pushed forward by the surface of the stop seat 21 to disengage the external gear portion 331 without engaging with the internal gear portion 63.

The structure of the first preferred embodiment has been described above, and the operation state of the first preferred embodiment will be described next.

Please refer to Figures 5 to 8, when the user wants to pull out a portion of the flexible cable 99 from the wire take-up device 94 or store the flexible cable 99 in the wire take-up device 94, both are rotated The wire wheel 97 causes the flexible cable 99 to be released from the wire wheel 97 or wound around the wire wheel 97.

In order to clearly describe the operating state of the first preferred embodiment, when describing the operating steps that the user wants to lock the reel 97 so that it cannot rotate freely, the initial position of the operating lever 11 is at the release position P2, That is, the two protrusions 12 are pushed forward on the surface of the stop seat 21 and are not located in the two locking grooves 23; when explaining the operation steps that the user wants to make the wire wheel 97 freely rotate relative to the frame 95, The initial position of the operating lever 11 is at the locked position P1, but in actual implementation, the initial position of the operating lever 11 can be the locked position P1 or the release position P2.

When the user wants to lock the wire wheel 97 so that it cannot rotate freely, the user rotates the dial 71 by operating to rotate the operating rod 11 with its axis as the rotation axis until the two protrusions 12 are located in the two locking grooves 23 Front, and the two protrusions 12 are pushed back by the elastic element 41 by the elastic restoring force to push the locking member 31 back and move back together with the locking member 31, so that the two protrusions 12 extend in and interfere with the two locking Slot 23 and the external gear portion 331 are engaged with the internal gear portion 63, the operating rod 11 is located at the locking position P1 and cannot rotate freely relative to the frame 95.

Since the locked member 61 with the internal gear portion 63 is fixed to the wire wheel 97, and the external gear portion 331 is meshed with the internal gear portion 63, when the operating rod 11 cannot be opposed to the frame 95 When freely rotating, the wire wheel 97 cannot rotate freely relative to the frame body 95.

When the user wants to make the wire wheel 97 freely rotate with respect to the frame 95, the user continuously applies the turntable 71 to pull forward and is greater than the elastic restoring force of the elastic element 41 (in the figure) (Not shown), the operating rod 11 is moved forward and the two protrusions 12 are separated from the two locking grooves 23 and located in front of the two locking grooves 23, and the external gear portion 331 is disengaged and does not engage with the internal gear Department 63.

When the two protrusions 12 escape from the two locking grooves 23 and are located in front of the two locking grooves 23, the user maintains the pulling force (not shown in the figure), and at the same time rotates the turntable 71 by operating to make the operating lever 11 Rotate with its axis as the rotation axis until the two protrusions 12 are not located in front of the two locking grooves 23.

When the two protrusions 12 are not located in front of the two locking grooves 23, the user releases the turntable 71, and the operating rod 11 is pushed back by the elastic element 41 by its elastic restoring force to push the locking member 31 back together. The locking member 31 is displaced backward, and the two protrusions 12 are not located in the two locking grooves 23 by the front surface of the stop seat 21, and the external gear portion 331 is located in front of the internal gear portion 63. The operating lever 11 is located at the release position P2.

Since the two protrusions 12 do not interfere with the two locking grooves 23, and the external gear portion 331 is disengaged and does not engage with the internal gear portion 63, the wire wheel 97 with the internal gear portion 63 can be opposed to the frame The body 95 rotates freely.

Thereby, when the user has wound the flexible cable 99 on the reel 97 to complete the storage of the flexible cable 99 in the wire take-up device 94, or has stretched out the flexible cable 99 from the wire take-up device 94 After the length of the flexible cable 99 is required, the user can rotate the operating rod 11 to make the operating rod 11 in the locked position P1, and the wire wheel 97 is interfered by the locking member 31 and cannot be opposed to The frame 95 rotates freely; and when the user wants to stretch the flexible cable 99 from the wire take-up device 94 or wind the flexible cable 99 on the reel 97, the user can use Operate to rotate the operating rod 11 so that the operating rod 11 is located at the release position P2, and the wire wheel 97 is free to rotate relative to the frame 95 without being interfered by the locking member 31.

As shown in Figs. 9 to 11, the second preferred embodiment of the present invention provides a locking structure 80 for a wire take-up device, which is basically the same as the first preferred embodiment disclosed above, except that:

In the second preferred embodiment, the stop seat 21 further has two positioning grooves 24 recessed rearward from the front end thereof, the two positioning grooves 24 are open toward one end of the shaft hole 22, and the two positioning grooves The depth of 24 along the front and rear direction is such that when the two protrusions 12 are located in the two positioning grooves 24, the external gear portion 331 of the locking member 31 will not engage with the internal gear portion 63, and two of the positioning grooves 24 The wall surface of the groove gradually expands forward and outward to form an oblique shape, and the two locking grooves 23 and the two positioning grooves 24 are equidistant from each other and are arranged at an annular interval relative to the shaft hole 22.

When the operating lever 11 is at the release position P2 and the two protrusions 12 are not located in the two positioning grooves 24, the user can further rotate the turntable 71 by operating to make the two protrusions 12 follow the position of the operating rod 11 The axis is the axis of rotation. When the two protrusions 12 rotate to above the two positioning grooves 24, the two protrusions 12 are pushed back indirectly by the elastic restoring force of the elastic element 41 and are inclined along the positioning grooves 24 respectively. One of the groove walls slides into the two positioning grooves 24, the two protrusions 12 interfere with the two positioning grooves 24, and the external gear portion 331 is not engaged with the internal gear portion 63.

When the operating lever 11 is at the release position P2 and the two protrusions 12 interfere with the two positioning grooves 24, the user can rotate the dial 71 by operating, and when the user acts on the two protrusions 12 When the forward component force of the inclined groove wall surface of the two positioning grooves 24 is greater than the elastic restoring force of the elastic element 41, the two protrusions 12 are separated along one of the groove wall surfaces of each of the positioning grooves 24 without interfering with each other. The positioning groove 24 and the external gear portion 331 are not engaged with the internal gear portion 63.

Thereby, when the operating rod 11 is at the release position P2 and the two protrusions 12 interfere with the two positioning grooves 24, the operating rod 11 is not easily affected by an external force to rotate or move to the locked position P1. In addition, by Since the two positioning grooves 24 are inclined with the two groove walls, the user only needs to rotate the turntable 71 to make the operating rod 11 rotate synchronously, and the two protrusions 12 can be extended into or out of the two positioning grooves 24 , Without having to pull the turntable 71 and the operating lever 11 backwards, which makes the operation of the second preferred embodiment convenient.

The rest of the structure of the second preferred embodiment and its achievable effects are the same as those of the first preferred embodiment disclosed above, and will not be repeated.

As shown in Figures 12 to 15, the third preferred embodiment of the present invention provides a locking structure 90 for a wire take-up device, which is basically the same as the previous second preferred embodiment, and the difference lies in:

In the third preferred embodiment, the operating rod 11 further has a first shoulder 13 extending radially outward, and the two protrusions 12 protrude from two opposite outer sides of the first shoulder 13 .

The front end of the stop seat 21 has a front end surface 27, and the stop seat 21 protrudes forward from the front end surface 27 with a boss 25 and further has a circular groove 26 recessed backward from the front end of the stop seat 21. The hole 22 penetrates the groove bottom of the circular groove 26, the two positioning grooves 24 are provided on the boss 25, and the part of the two groove wall surfaces where each of the locking grooves 23 are located on the boss 25 gradually expands forward and outward.

The positioning block 32 further has a second shoulder 321 protruding outward.

The diameter of the front and rear openings of the sleeve 51 is large in the front and small in the rear, and a step surface 52 is formed on the inner wall of the peripheral wall.

Wherein, when the operating lever 11 is located at the release position P2, the second shoulder 321 is located in front of the step surface 52 but does not touch; when the operating lever 11 is located at the locking position P1, the first shoulder 13 is located at In the circular groove 26, the second shoulder 321 is pressed against the sleeve 51.

When the user wants to lock the wire wheel 97 so that it cannot rotate freely, by operating the rotating disc 71, the two protrusions 12 are located in front of the two locking grooves 23, the two protrusions 12 and the first shoulder 13 is subjected to the elastic element 41 to push the locking member 31 back by its elastic restoring force, and to move back together with the locking member 31, so that the two protrusions 12 extend into and interfere with the two locking grooves 23, and the first shoulder The portion 13 extends into the circular groove 26 and presses against the bottom of the circular groove 26, and the second shoulder 321 presses against the sleeve 51, the operating rod 11 is located at the locking position P1.

When the user wants to make the wire wheel 97 freely rotate relative to the frame 95, the user continuously pulls the turntable 71 and rotates the turntable 71 until the two protrusions 12 are not located in front of the two locking grooves 23, The first shoulder 13 and the second shoulder 321 move forward at the same time, and the first shoulder 13 is not pressed against the bottom of the circular groove 26, and the second shoulder 321 is located on the step surface 52 Front side but no contact.

When the two protrusions 12 are not located in front of the two locking grooves 23, the user releases the turntable 71, and the operating rod 11 is pushed back by the elastic element 41 by its elastic restoring force to push the locking member 31 back together. The locking member 31 is displaced backward, and the two protrusions 12 are not located in the two locking grooves 23 by the front surface of the stop seat 21, and the external gear portion 331 is located in front of the internal gear portion 63. The operating lever 11 is located at the release position P2.

Therefore, compared with the first and second preferred embodiments disclosed above, the elastic restoring force of the elastic element 41 only acts on the two protrusions 12. In the third preferred embodiment, When the operating rod 11 is in the locked position P1, the elastic restoring force of the elastic element 41 acts on the two protrusions 12, the first shoulder 13 and the second shoulder 321, so that the operating rod 11 is The two protrusions 12 and the first shoulder 13 are pressed against the stop seat 21 backwards, and the locking member 31 is pressed against the sleeve 51 with the second shoulder 321. Therefore, the elastic element 41 is The component force of the elastic restoring force acting on the two protrusions 12, the first shoulder 13 and the second shoulder 321 is small and is not easy to damage the components, that is, the third preferred embodiment has better durability.

The rest of the structure of the third preferred embodiment and its achievable effects are the same as those of the second preferred embodiment disclosed above, and will not be repeated.

10: Locking structure for take-up device 11: Joystick 12: bump 21: Stop seat 22: Shaft hole 23: lock slot 31: Locking piece 32: positioning block 33: Cards 331: External Gear 41: Elastic element 51: Axle sleeve 61: locked piece 62: Snap hole 63: Internal gear 71: turntable P1: Locked position P2: Release position 80: Locking structure for take-up device 24: positioning slot 90: Locking structure for take-up device 13: The first shoulder 25: boss 26: round groove 27: Front face 321: second shoulder 52: step surface 94: Take-up device 95: Frame 96: fixed plate 961: perforation 97: wire wheel 98: shaft 99: Flexible cable

Fig. 1 is a perspective view of the wire take-up device of the first preferred embodiment of the present invention, showing the state of the first preferred embodiment of the present invention combined with the wire take-up device. Fig. 2 is a side view of the wire take-up device of the first preferred embodiment of the present invention, showing the state of combining the first preferred embodiment of the present invention in the wire take-up device, and the part of the partial cross-sectional view shows that the flexible cable is wound on the wire The state of the wheel. Figure 3 is an exploded view of the partial structure of the first preferred embodiment of the present invention, showing the structure of the turntable, the operating rod and the stop seat. Figure 4 is an exploded view of the first preferred embodiment of the present invention. Figure 5 is a perspective view of the partial structure of the wire take-up device of the first preferred embodiment of the present invention, showing the combined relationship of the first preferred embodiment of the present invention with the fixed plate and the wire wheel, and the operating lever is in the locked position. Figure 6 is a cross-sectional view taken along line 6-6 in Figure 5. FIG. 7 is a perspective view of the partial structure of the wire take-up device of the first preferred embodiment of the present invention, showing the combined relationship of the first preferred embodiment of the present invention with the fixing plate and the wire wheel, and the operating lever is in the released position. Figure 8 is a cross-sectional view taken along the line 8-8 in Figure 7. Figure 9 is an exploded view of the second preferred embodiment of the present invention. Figure 10 is an exploded view of the partial structure of the second preferred embodiment of the present invention, showing the structure of the turntable, the operating rod and the stop seat. Fig. 11 is a sectional view of the partial structure of the wire take-up device of the second preferred embodiment of the present invention. The position of the section line in this figure is the same as the position of the section line 8-8 in Fig. 7. Figure 12 is an exploded view of the third preferred embodiment of the present invention. Figure 13 is an exploded view of the partial structure of the third preferred embodiment of the present invention, showing the structure of the turntable, the operating rod and the stop seat. Fig. 14 is a sectional view of the partial structure of the wire take-up device of the third preferred embodiment of the present invention. The position of the section line in this figure is the same as that of the section line 8-8 in Fig. 7. Fig. 15 is a sectional view of the partial structure of the wire take-up device of the third preferred embodiment of the present invention. The position of the section line in this figure is the same as that of the section line 6-6 in Fig. 5.

10: Locking structure for take-up device

71: turntable

95: Frame

96: fixed plate

97: wire wheel

99: Flexible cable

Claims (8)

A locking structure for a wire take-up device is used to be arranged on a wire take-up device. The wire take-up device has a frame, a fixed plate and a wire wheel. The fixed plate has a perforation. The wire wheel can be configured by a rotating shaft. It is rotatably arranged on the frame, and the locking structure for the wire take-up device includes: An operating rod with two protrusions extending radially outward and in opposite directions; A stop seat is arranged on the fixing plate and located in front of the fixing plate. The stop seat has a shaft hole penetrating forward and backward to communicate with the perforation, and has two locking grooves recessed from the front end to the rear, the two locking grooves Is located on both sides of the shaft hole and is open toward one end of the shaft hole, and the operating rod passes through the shaft hole and the perforation; A locking member has a positioning block and a locking member, the positioning block is fixed on the operating lever and located at the rear end thereof, the outer surface of the locking member has an external gear part, and the locking member is fixed to the positioning Block and located behind the positioning block; An elastic element, both ends of which abut against the locking member and the stop seat respectively, and the elastic restoring force is to push the locking member backward; A shaft sleeve which penetrates back and forth and is fixed on the fixing plate and sleeved on the locking member; and A locked part has a clamping hole penetrating back and forth, the locked part has an internal gear part located on the inner peripheral wall of the clamping hole, the locked part is fixed on the wire reel and rotates with the wire reel, the The locked part is rotatably arranged on the shaft sleeve; Wherein, the operating lever is used for the user to operate and rotate to move between a locked position and a released position. When the operating lever is located in the locked position, the elastic element pushes the locking member together with the operating lever to move backwards. The two projections interfere with the two locking grooves, and the external gear part is engaged with the internal gear part; when the operating lever is not in the locking position, that is, in the release position, the two projections are blocked by the The surface of the seat is pushed forward so that the external gear part is disengaged and does not engage with the internal gear part. The locking structure for a wire take-up device according to claim 1, wherein: the stop seat further has two positioning grooves recessed from the front end of the stop seat, and the two positioning grooves are open toward one end of the shaft hole, and The depth of the two positioning grooves in the front and rear direction is such that when the two protrusions are located in the two positioning grooves, the external gear portion of the locking member will not engage with the internal gear portion, and the two groove wall surfaces of each positioning groove are Gradually expand forward and outward. The locking structure for a wire take-up device according to claim 2, wherein: the two locking grooves and the two positioning grooves are equidistant from each other and are arranged at an annular interval relative to the shaft hole. The locking structure for a wire take-up device according to claim 2, wherein: the front end of the stop base has a front end surface, the stop base protrudes forward from the front end surface with a boss, and the two positioning grooves are provided on the Boss. The locking structure for a wire take-up device according to claim 4, wherein: the wall surfaces of the two grooves of each of the locking grooves on the boss are gradually expanded forwards and outwards. The locking structure for a wire take-up device according to claim 1, wherein: the operating rod further has a first shoulder extending radially outward, and the two protrusions are opposite to each other from the first shoulder Two outward protrusions; the stop seat further has a circular groove recessed from the front end to the rear, the shaft hole penetrates the groove bottom of the circular groove, and when the operating lever is in the locking position, the first shoulder is located in the circular groove Inside. The locking structure for a wire take-up device according to claim 1, wherein: the positioning block further has a second shoulder protruding outward; the front and rear openings of the sleeve have a large front and a small diameter on the surrounding wall The inner wall forms a step surface; wherein, when the operating lever is in the release position, the second shoulder is located in front of the step surface but does not touch; when the operating lever is in the locking position, the second shoulder presses against于The shaft sleeve. The locking structure for the wire take-up device according to claim 1, wherein: it further includes a turntable arranged at the front end of the operating rod.

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