Mobile laser target in water

Abstract

The utility model provides an underwater mobile laser target, and belongs to the technical field of laser targets. The underwater mobile laser target comprises a shell, a weight reduction opening, a supporting plate, a water pump, a water inlet pipe assembly, a water outlet pipe assembly, a protective shell, a laser signal receiver, a motor, a rotating shaft and a rudder plate. The input end of the water pump communicates with the water inlet pipe assembly, the output end of the water pump communicates with the water outlet pipe assembly, and the water inlet pipe assembly and the water outlet pipe assembly penetrate through the front portion and the rear portion of the shell correspondingly, so that the water pump can suck water into the water pump through the water inlet pipe assembly, and the water is discharged through the water outlet pipe assembly; therefore, thrust is formed to drive the shell to move; meanwhile, the motor drives the rudder plate to rotate through the rotating shaft to adjust the angle of the rudder plate, so that the moving direction of the shell on the water surface is adjusted, the difficulty of hitting the laser signal receiver is improved, and the entertainment of the product is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of laser targets, and in particular relates to an underwater mobile laser target. Background Art

[0002] In amusement equipment, shooting target is a game suitable for both adults and children; since traditional marble shooting has certain dangers, laser shooting is widely used in amusement equipment.

[0003] The prior art (publication number: CN204718500U) discloses a water sports target drone, including a floating platform, a target board and a target drone master control system; the target drone master control system includes a propulsion system, and the propulsion system includes a stroke detection module, a first drive circuit and a propeller motor, the stroke detection module is electrically connected to the input end of the system main control circuit, the first drive circuit is electrically connected to the output end of the system main control circuit, the propeller motor is electrically connected to the control end of the first drive circuit, and the output shaft of the propeller motor is connected to a propeller. This new water sports target drone realizes the function of setting targets on water at will, thereby getting rid of the backward method of transporting and adjusting the position of the target drone by boat in the past, saving a lot of manpower, material resources and time, reducing the number of support personnel for shooting training, and improving the safety of live-fire shooting.

[0004] In the prior art, since the moving direction of the product cannot be adjusted, the difficulty of hitting the moving target cannot be increased, thereby reducing the entertainment value of the product. Utility Model Content

[0005] In order to solve the problem that the direction of product movement cannot be adjusted in the above-mentioned prior art, and therefore the difficulty of hitting the moving target cannot be increased, thereby reducing the product entertainment, the utility model provides an underwater mobile laser target, which uses a motor to drive the rudder plate to rotate through a rotating shaft to adjust the angle of the rudder plate, thereby adjusting the moving direction of the shell on the water surface, so as to increase the difficulty of hitting the laser signal receiver, thereby improving the product entertainment effect. The specific technical solution is:

[0006] A mobile laser target in water, the mobile laser target in water includes: a housing, a weight reduction port, a support plate, a water pump, an inlet pipe assembly, an outlet pipe assembly, a protective housing, a laser signal receiver, a motor, a rotating shaft and a rudder plate; the housing is a hollow sphere; the weight reduction port is arranged at the top of the housing; the support plate is embedded in the housing, the support plate is connected to the inner wall of the housing, and the support plate is located below the weight reduction port; the water pump is fixed on the support plate; one end of the inlet pipe assembly is communicated with the input end of the water pump, and the other end of the inlet pipe assembly passes through the front part of the housing; one end of the outlet pipe assembly is communicated with the output end of the water pump, and the other end of the outlet pipe assembly passes through the rear part of the housing; the protective housing is a hollow cavity with an opening at one end, and a plurality of protective housings are connected to the outer wall of the housing; the laser signal receiver is embedded in the protective housing, and the laser signal receiver and the protective housing are installed in the protective housing; the motor is provided with an output shaft, and the motor is fixed on the support plate; one end of the rotating shaft is connected to the output shaft of the motor, and the other end of the rotating shaft passes through the housing; the rudder plate is connected to the other end of the rotating shaft, and the rudder plate is located outside the housing; wherein, the protective housing is a transparent body.

[0007] In addition, the mobile laser target in water provided by the above technical solution of the present utility model may further have the following additional technical features:

[0008] In the above technical solution, the inlet pipe assembly includes: an inlet pipe body and a first hose; one end of the inlet pipe body is communicated with the input end of the water pump; the first hose is an elastic body, one end of the first hose is communicated with the other end of the inlet pipe body, and the other end of the first hose passes through the housing.

[0009] In the above technical solution, the outlet pipe assembly includes: an outlet pipe body and a second hose; one end of the outlet pipe body is connected to the output end of the water pump; the second hose is an elastic body, one end of the second hose is communicated with the other end of the outlet pipe body, and the other end of the second hose passes through the housing.

[0010] In the above technical solution, the mobile laser target in water includes: a first support pipe and a second support pipe; the first support pipe is a hollow cavity with openings at both ends, the first support pipe is embedded in the other end of the first hose, and the first support pipe is located inside the housing; the second support pipe is a hollow cavity with openings at both ends, the second support pipe is embedded in the other end of the second hose, and the second support pipe is located inside the housing; wherein, the first support pipe is a plastic body, and the second support pipe is a plastic body.

[0011] In the above technical solution, the mobile laser target in water includes: a sealing sleeve; the sealing sleeve is an elastic body, the sealing sleeve is wound around the outside of the rotating shaft, and the sealing sleeve is embedded in the housing.

[0012] In the above technical solution, the underwater mobile laser target includes: an internal thread and a mounting plate; the internal thread is provided on the inner wall of the protective shell; an external thread is provided on the outer wall of the mounting plate, the mounting plate is fixed on the outer wall of the housing, and the protective shell is sleeved outside the mounting plate; wherein, the internal thread is adapted to the external thread.

[0013] In the above technical solution, the underwater mobile laser target includes: a connection hole and an adjustment groove; at least two connection holes are provided on both sides of the motor; at least two adjustment grooves are provided on both sides of the motor, and the adjustment groove communicates with the connection hole.

[0014] An underwater mobile laser target of the present utility model has the following beneficial effects compared with the prior art:

[0015] 1. By connecting the input end of the water pump to the water inlet pipe assembly and the output end of the water pump to the water outlet pipe assembly, and enabling the water inlet pipe assembly and the water outlet pipe assembly to pass through the front and rear parts of the housing respectively, the water pump can suck water into the water pump through the water inlet pipe assembly and discharge it through the water outlet pipe assembly, thereby forming a thrust to drive the housing to move; meanwhile, the motor drives the rudder plate to rotate through the rotating shaft to adjust the angle of the rudder plate, thereby adjusting the moving direction of the housing on the water surface, increasing the difficulty of hitting the laser signal receiver, and further enhancing the entertainment of the product.

[0016] 2. By connecting one end of the water inlet pipe body to the input end of the water pump and one end of the first hose to the other end of the water inlet pipe body, and enabling the other end of the first hose to pass through the housing, the water pump can suck the water outside the housing into the water pump through the water inlet pipe body and the first hose. By setting the first hose as an elastic body, the connection between the first hose and the housing can be sealed by using the elasticity of the first hose, thereby preventing water from entering the housing.

[0017] 3. By connecting one end of the water outlet pipe body to the output end of the water pump and one end of the second hose to the other end of the water outlet pipe body, and enabling the other end of the second hose to pass through the housing, the water pump can discharge water to the outside of the housing through the water outlet pipe body and the second hose, thereby forming a thrust to drive the housing to move on the water surface. By setting the second hose as an elastic body, the connection between the second hose and the housing can be sealed by using the elasticity of the second hose, thereby preventing water from entering the housing.

[0018] 4. By setting the first support tube as a hollow cavity with openings at both ends, embedding the first support tube into the other end of the first hose, and placing the first support tube inside the housing, while setting the first support tube as a plastic body to achieve a certain hardness of the first support tube, thereby enabling the first support tube to support the first hose, and further enabling the first hose to be closely attached to the housing to improve the sealing performance of the housing. By setting the second support tube as a hollow cavity with openings at both ends, embedding the second support tube into the other end of the second hose, and placing the second support tube inside the housing, while setting the second support tube as a plastic body to achieve a certain hardness of the second support tube, thereby enabling the second support tube to support the second hose, and further enabling the second hose to be closely attached to the housing to improve the sealing performance of the housing.

[0019] 5. By setting the sealing sleeve as an elastic body, winding the sealing sleeve around the outside of the rotating shaft, and embedding the sealing sleeve into the housing, to achieve sealing of the connection between the rotating shaft and the housing, thereby preventing water from entering the housing and improving the user experience of the product.

[0020] 6. By sleeving the protective shell on the outside of the mounting plate and making the internal thread in the protective shell fit with the external thread on the outer wall of the mounting plate, to achieve threaded connection between the protective shell and the mounting plate, thereby facilitating the disassembly and assembly of the protective shell on the housing and improving the user experience of the product.

[0021] 7. By providing a plurality of adjustment slots on both sides of the motor and making the adjustment slots communicate with the connection holes, to enable the connection bolts to move within the adjustment slots, thereby adjusting the position of the motor and improving the user experience of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 One of the three-dimensional views of a mobile laser target in water according to the present utility model;

[0023] Figure 2 A cross-sectional view of a mobile laser target in water according to the present utility model;

[0024] Figure 3 is Figure 2 A partial enlarged view of part A;

[0025] Figure 4 is Figure 2 A partial enlarged view of part B;

[0026] Figure 5 Another three-dimensional view of a mobile laser target in water according to the present utility model;

[0027] Among them, Figures 1 to 5 The corresponding relationship between the reference numerals in the drawings and the component names is as follows:

[0028] 10 housing, 11 weight reduction port, 12 support plate, 13 water pump, 14 water inlet pipe assembly, 141 water inlet pipe body, 142 first hose, 15 water outlet pipe assembly, 151 water outlet pipe body, 152 second hose, 16 protective shell, 17 laser signal receiver, 18 motor, 19 rotating shaft, 20 rudder plate, 21 first support pipe, 22 second support pipe, 23 sealing sleeve, 24 mounting plate, 25 connecting hole, 26 adjusting groove. Detailed implementation manners

[0029] The following combines specific implementation cases and appendices Figures 1 to 5 to further illustrate the present utility model, but the present utility model is not limited to these embodiments.

[0030] A mobile laser target in water, as Figures 1 to 5 shown, the mobile laser target in water includes: a housing 10, a weight reduction port 11, a support plate 12, a water pump 13, a water inlet pipe assembly 14, a water outlet pipe assembly 15, a protective shell 16, a laser signal receiver 17, a motor 18, a rotating shaft 19 and a rudder plate 20; the housing 10 is a hollow sphere; the weight reduction port 11 is arranged at the top of the housing 10; the support plate 12 is embedded in the housing 10, the support plate 12 is connected to the inner wall of the housing 10, and the support plate 12 is located below the weight reduction port 11; the water pump 13 is fixed on the support plate 12; one end of the water inlet pipe assembly 14 is communicated with the input end of the water pump 13, and the other end of the water inlet pipe assembly 14 passes through the front part of the housing 10; one end of the water outlet pipe assembly 15 is communicated with the output end of the water pump 13, and the other end of the water outlet pipe assembly 15 passes through the rear part of the housing 10; the protective shell 16 is a hollow cavity with an opening at one end, and a plurality of protective shells 16 are connected to the outer wall of the housing 10; the laser signal receiver 17 is embedded in the protective shell 16, and the laser signal receiver 17 and the protective shell 16 are installed in the protective shell 16; the motor 18 is provided with an output shaft, and the motor 18 is fixed on the support plate 12; one end of the rotating shaft 19 is connected to the output shaft of the motor 18, and the other end of the rotating shaft 19 passes through the housing 10; the rudder plate 20 is connected to the other end of the rotating shaft 19, and the rudder plate 20 is located outside the housing 10; wherein, the protective shell 16 is a transparent body.

[0031] By setting the outer shell 10 as a hollow spherical body and arranging the weight-reducing port 11 at the top of the outer shell 10, it is achieved that the outer shell 10 can float on the water surface, thus realizing the structure of the outer shell 10 with a heavier bottom and a lighter top, and further avoiding the outer shell 10 from flipping on the water surface; by embedding the support plate 12 into the outer shell 10 and connecting the support plate 12 to the inner wall of the outer shell 10 by welding, it is achieved that the outer shell 10 supports the support plate 12; by fixing the water pump 13 and the motor 18 on the support plate 12, it is achieved that the support plate 12 supports the water pump 13 and the motor 18, thereby improving the stability of the water pump 13 and the motor 18. By connecting one end of the water inlet pipe assembly 14 to the input end of the water pump 13 and passing the other end of the water inlet pipe assembly 14 through the front part of the outer shell 10, it is achieved that the water pump 13 can suck water into the water pump 13 through the water inlet pipe assembly 14; by connecting one end of the water outlet pipe assembly 15 to the output end of the water pump 13 and passing the other end of the water outlet pipe assembly 15 through the rear part of the outer shell 10, it is achieved that the water pump 13 can discharge the sucked water through the water outlet pipe assembly 15, thereby forming a thrust to drive the outer shell 10 to move on the water surface. By connecting a plurality of protective shells 16 to the outer wall of the outer shell 10 and installing the laser signal receiver 17 in the protective shell 16, it is achieved that the outer shell 10 drives the laser signal receiver 17 to move through the protective shell 16, thereby adjusting the position of the laser signal receiver 17 on the water surface, increasing the difficulty of hitting the laser signal receiver 17, and further enhancing the entertainment of the product. By connecting one end of the rotating shaft 19 to the output shaft of the motor 18, passing the other end of the rotating shaft 19 through the outer shell 10, and connecting the rudder plate 20 to the other end of the rotating shaft 19, it is achieved that the motor 18 can drive the rudder plate 20 to rotate through the rotating shaft 19, thereby adjusting the angle of the rudder plate 20, adjusting the moving direction of the outer shell 10, and further enhancing the use experience of the product.

[0032] Adopting the above structure, by connecting the input end of the water pump 13 to the water inlet pipe assembly 14, connecting the output end of the water pump 13 to the water outlet pipe assembly 15, and enabling the water inlet pipe assembly 14 and the water outlet pipe assembly 15 to pass through the front part and the rear part of the outer shell 10 respectively, it is achieved that the water pump 13 can suck water into the water pump 13 through the water inlet pipe assembly 14 and discharge it through the water outlet pipe assembly 15, thereby forming a thrust to drive the outer shell 10 to move; at the same time, enabling the motor 18 to drive the rudder plate 20 to rotate through the rotating shaft 19 to adjust the angle of the rudder plate 20, thereby adjusting the moving direction of the outer shell 10 on the water surface, increasing the difficulty of hitting the laser signal receiver 17, and further enhancing the entertainment of the product.

[0033] In the embodiment of the present utility model, as Figures 1 to 5As shown, the water inlet pipe assembly 14 includes: a water inlet pipe body 141 and a first hose 142; one end of the water inlet pipe body 141 is connected to the input end of the water pump 13; the first hose 142 is an elastomer, one end of the first hose 142 is connected to the other end of the water inlet pipe body 141, and the other end of the first hose 142 passes through the housing 10.

[0034] By connecting one end of the water inlet pipe body 141 to the input end of the water pump 13, connecting one end of the first hose 142 to the other end of the water inlet pipe body 141, and making the other end of the first hose 142 pass through the housing 10, it is realized that the water pump 13 can suck the water outside the housing 10 into the water pump 13 through the water inlet pipe body 141 and the first hose 142. By setting the first hose 142 as an elastomer, it is realized that the connection part between the first hose 142 and the housing 10 is sealed by the elasticity of the first hose 142, so as to prevent water from entering the housing.

[0035] In the embodiment of the present utility model, as Figures 1 to 5 shown, the water outlet pipe assembly 15 includes: a water outlet pipe body 151 and a second hose 152; one end of the water outlet pipe body 151 is connected to the output end of the water pump 13; the second hose 152 is an elastomer, one end of the second hose 152 is connected to the other end of the water outlet pipe body 151, and the other end of the second hose 152 passes through the housing 10.

[0036] By connecting one end of the water outlet pipe body 151 to the output end of the water pump 13, connecting one end of the second hose 152 to the other end of the water outlet pipe body 151, and making the other end of the second hose 152 pass through the housing 10, it is realized that the water pump 13 can discharge water to the outside of the housing 10 through the water outlet pipe body 151 and the second hose 152, so as to form a thrust to drive the housing 10 to move on the water surface. By setting the second hose 152 as an elastomer, it is realized that the connection part between the second hose 152 and the housing 10 is sealed by the elasticity of the second hose 152, so as to prevent water from entering the housing.

[0037] In the embodiment of the present utility model, as Figures 1 to 5 shown, the laser target for underwater movement includes: a first support tube 21 and a second support tube 22; the first support tube 21 is a hollow cavity with openings at both ends, the first support tube 21 is embedded in the other end of the first hose 142, and the first support tube 21 is located inside the housing 10; the second support tube 22 is a hollow cavity with openings at both ends, the second support tube 22 is embedded in the other end of the second hose 152, and the second support tube 22 is located inside the housing 10; wherein, the first support tube 21 is a plastic body, and the second support tube 22 is a plastic body.

[0038] By setting the first support tube 21 as a hollow cavity with openings at both ends, embedding the first support tube 21 into the other end of the first hose, and placing the first support tube 21 inside the housing 10, and at the same time setting the first support tube 21 as a plastic body to achieve a certain hardness of the first support tube 21, so as to realize that the first support tube 21 supports the first hose 142, and further realize that the first hose 142 is closely attached to the housing 10 to improve the sealing performance of the housing 10. By setting the second support tube 22 as a hollow cavity with openings at both ends, embedding the second support tube 22 into the other end of the second hose, and placing the second support tube 22 inside the housing 10, and at the same time setting the second support tube 22 as a plastic body to achieve a certain hardness of the second support tube 22, so as to realize that the second support tube 22 supports the second hose 152, and further realize that the second hose 152 is closely attached to the housing 10 to improve the sealing performance of the housing 10.

[0039] In an embodiment of the present invention, as Figures 1 to 5 shown, the underwater mobile laser target includes: a sealing sleeve 23; the sealing sleeve 23 is an elastic body, the sealing sleeve 23 is wound around the outside of the rotating shaft 19, and the sealing sleeve 23 is embedded inside the housing 10.

[0040] By setting the sealing sleeve 23 as an elastic body, winding the sealing sleeve 23 around the outside of the rotating shaft 19, and embedding the sealing sleeve 23 inside the housing 10, to achieve sealing of the connection between the rotating shaft 19 and the housing 10 by the sealing sleeve 23, thereby preventing water from entering the housing 10 and improving the user experience of the product.

[0041] In an embodiment of the present invention, as Figures 1 to 5 shown, the underwater mobile laser target includes: an internal thread and a mounting plate 24; the internal thread is provided on the inner wall of the protective shell 16; an external thread is provided on the outer wall of the mounting plate 24, the mounting plate 24 is fixed on the outer wall of the housing 10, and the protective shell 16 is sleeved outside the mounting plate 24; wherein, the internal thread is adapted to the external thread.

[0042] By fixing the mounting plate 24 on the outer wall of the housing 10 by welding, to connect the mounting plate 24 and the housing 10 together; by sleeving the protective shell 16 outside the mounting plate 24 and making the internal thread in the protective shell 16 adapted to the external thread on the outer wall of the mounting plate 24, to realize the threaded connection between the protective shell 16 and the mounting plate 24, thereby facilitating the disassembly and assembly of the protective shell 16 on the housing 10 and improving the user experience of the product.

[0043] In an embodiment of the present invention, as Figures 1 to 5As shown in the figure, the mobile laser target in water includes: connection holes 25 and adjustment slots 26; at least two connection holes 25 are arranged on both sides of the motor 18; at least two adjustment slots 26 are arranged on both sides of the motor 18, and the adjustment slots 26 communicate with the connection holes 25.

[0044] By arranging a plurality of connection holes 25 on both sides of the motor 18, it is convenient for the connecting bolts to pass through the connection holes 25, so as to facilitate fixing the motor 18 on the support plate 12 through the connecting bolts; by arranging a plurality of adjustment slots 26 on both sides of the motor 18 and making the adjustment slots 26 communicate with the connection holes 25, it is realized that the connecting bolts can move in the adjustment slots 26, thereby adjusting the position of the motor 18 to improve the use experience of the product.

[0045] In the description of the present utility model, the term "a plurality" means two or more, unless otherwise clearly defined. The terms "upper", "lower", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model; the terms "connection", "installation", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0046] In the description of the present utility model, the descriptions of the terms "an embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In the present utility model, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0047] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A mobile laser target in water, characterized in that: The underwater mobile laser target comprises: An outer shell, wherein the outer shell is a hollow sphere; A weight-reducing opening, the weight-reducing opening being arranged at the top of the shell; A support plate, wherein the support plate is embedded in the shell, the support plate is connected to the inner wall of the shell, and the support plate is located below the weight reduction opening; a water pump, wherein the water pump is fixed on the support plate; A water inlet pipe assembly, one end of which is connected to the input end of the water pump, and the other end of which passes through the front portion of the housing; a water outlet pipe assembly, one end of which is connected to the output end of the water pump, and the other end of which passes through the rear portion of the housing; A protective shell, wherein the protective shell is a hollow cavity with an opening at one end, and a plurality of the protective shells are connected to the outer wall of the outer shell; A laser signal receiver, the laser signal receiver is embedded in the protective shell, and the laser signal receiver and the protective shell are installed in the protective shell; A motor, wherein the motor is provided with an output shaft and the motor is fixed on the support plate; A rotating shaft, one end of which is connected to the output shaft of the motor, and the other end of which passes through the housing; A rudder plate, the rudder plate is connected to the other end of the rotating shaft and is located outside the housing; Wherein, the protective shell is a transparent body.

2. The underwater mobile laser target according to claim 1, characterized in that: The water inlet pipe assembly comprises: A water inlet pipe body, one end of which is connected to the input end of the water pump; A first hose, wherein the first hose is an elastic body, one end of the first hose is connected to the other end of the water inlet pipe body, and the other end of the first hose passes through the shell.

3. The underwater mobile laser target according to claim 2, characterized in that: The water outlet pipe assembly comprises: A water outlet pipe body, one end of which is connected to the output end of the water pump; The second hose is an elastic body, one end of the second hose is connected with the other end of the water outlet pipe body, and the other end of the second hose passes through the shell.

4. The underwater mobile laser target according to claim 3, characterized in that: The underwater mobile laser target comprises: A first support tube, wherein the first support tube is a hollow cavity with openings at both ends, the first support tube is embedded in the other end of the first hose, and the first support tube is located in the housing; A second support tube, wherein the second support tube is a hollow cavity with openings at both ends, the second support tube is embedded in the other end of the second hose, and the second support tube is located in the housing; Wherein, the first support tube is a plastic body, and the second support tube is a plastic body.

5. The underwater mobile laser target according to claim 1, characterized in that: The underwater mobile laser target comprises: The sealing sleeve is an elastic body, is wound around the outside of the rotating shaft, and is embedded in the outer shell.

6. The underwater mobile laser target according to claim 5, characterized in that: The underwater mobile laser target comprises: An internal thread, wherein the internal thread is arranged on the inner wall of the protective shell; A mounting plate, the outer wall of which is provided with external threads, the mounting plate is fixed to the outer wall of the housing, and the protective shell is sleeved on the outer side of the mounting plate; Wherein, the internal thread is matched with the external thread.

7. The underwater mobile laser target according to claim 6, characterized in that: The underwater mobile laser target comprises: Connecting holes, at least two of which are arranged on both sides of the motor; Adjustment grooves, at least two of which are arranged on both sides of the motor, and the adjustment grooves are communicated with the connecting holes.

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