Rotary connecting joint with stop control device and folding rod group

Abstract

The utility model discloses a rotary connection joint with a stop control device and a folding rod group, which comprise a first connecting piece, a second connecting piece, a locking piece, an elastic piece and a pressing piece, the first connecting piece is rotatably connected with the second connecting piece, a locking cavity is arranged between the first connecting piece and the second connecting piece which are connected with each other, and the elastic piece is arranged in the locking cavity. The first connecting piece or the second connecting piece is provided with a pressing cavity, and the locking piece is provided with a locking position and an unlocking position in the locking cavity. When the locking piece is located at the locking position, the first connecting piece and the second connecting piece do not rotate relatively, and when the locking piece is located at the unlocking position, the first connecting piece and the second connecting piece rotate relatively; the elastic piece abuts against the locking piece to enable the locking piece to be located at the locking position, the pressing piece is installed in the pressing cavity, the first part of the pressing piece abuts against the locking piece, and the second part of the pressing piece is exposed from the first connecting piece or the second connecting piece; when the pressing piece is pressed, the locking piece is located at the unlocking position; when the pressing piece is released, the locking piece is located at the locking position. According to the utility model, the unlocking and the operation are simple.

Description

Technical Field

[0001] This utility model relates to the field of folding rods, and in particular to a rotating connecting joint with a stop control device and a folding rod assembly. Background Technology

[0002] Folding rod assemblies are the core support structure for folding furniture (such as folding chairs and folding beds) and portable devices. Their core lies in the rotating connecting joints—the unfolding, fixing, folding, and storage of the rods are achieved through lockable hinge nodes.

[0003] Existing folding rod assemblies (such as folding chair frames) often use pin-type or knob-type locking joints, which have obvious defects: (1) Cumbersome operation: Unlocking requires two hands (such as pulling out the pin and rotating the nut), making it impossible to fold quickly with one hand. (2) Insufficient reliability: The pin is prone to accidentally coming out, causing the locking to fail, and the knob is prone to loosening due to vibration. (3) Exposed structure: The locking components are exposed to the outside, making them susceptible to contamination or mechanical damage. (4) Large space occupation: The external locking mechanism increases the joint volume and affects the compactness of folding.

[0004] Therefore, a technical solution to the above problems is needed. Utility Model Content

[0005] In order to solve the technical problems existing in the prior art, the purpose of this utility model is to provide a rotating connecting joint and a folding rod assembly with a stop control device to solve the above-mentioned technical problems.

[0006] To achieve its purpose, the present invention adopts the following technical solution:

[0007] A rotary joint with a stop control device includes:

[0008] A first connector and a second connector are rotatably connected, and a locking cavity is provided between the connected first connector and second connector; a pressing cavity is provided on the first connector or the second connector.

[0009] A locking element is installed within the locking cavity and has a locked position and an unlocked position; when the locking element is in the locked position, the first connecting element and the second connecting element do not rotate relative to each other; when the locking element is in the unlocked position, the first connecting element and the second connecting element rotate relative to each other.

[0010] An elastic element is installed in the locking cavity, and the elastic element abuts against the locking element, so that the locking element is in the locked position;

[0011] A pressing element is installed in the pressing cavity, with a first part of the pressing element abutting against the locking element in the locking cavity, and a second part exposed from the first connecting element or the second connecting element.

[0012] When the pressing member is pressed, the locking member is in the unlocked position; when the pressing member is released, the locking member is in the locked position.

[0013] Preferably, both the first connector and the second connector are provided with mounting grooves, and when the first connector and the second connector are connected to each other, the mounting grooves of the first connector and the second connector are in corresponding positions; the locking member has a protrusion, and the protrusion can slide in the mounting grooves of the first connector and the second connector;

[0014] When the locking member is in the locked position, the protrusion is completely located within the mounting groove of one of the first connector and the second connector;

[0015] When the locking member is in the unlocked position, the protrusion is located between the mounting groove of the first connector and the mounting groove of the second connector.

[0016] Preferably, one of the first connector and the second connector is provided with a limiting plate with a through hole, and the other is provided with a protrusion with a through hole. The first connector and the second connector are connected to the limiting plate through the through hole by bolts passing through the protrusion.

[0017] Preferably, the locking member is provided with a clearance hole, and when the locking member is installed in the locking cavity, the locking member is sleeved on the outside of the protrusion through the clearance hole.

[0018] Preferably, the second part of the pressing member is a cap portion exposed outside the pressing cavity, and the first part is a pressing foot that extends into the locking cavity and abuts against the locking member.

[0019] Preferably, the end of the pressing foot is provided with a limiting protrusion to prevent the pressing member from dislodging from the locking cavity.

[0020] Preferably, two pressing feet are provided. When the pressing feet are inserted into the locking cavity, the limiting plate is located between the two pressing feet, preventing the two pressing feet from moving relative to each other.

[0021] Preferably, both the first connector and the second connector are provided with an interface for connecting rods.

[0022] Preferably, it further includes two hinged reinforcing plates that are hinged to each other, and the two hinged reinforcing plates are respectively connected to the first connector and the second connector.

[0023] A folding rod assembly with a rotating joint having a stop control device includes the aforementioned rotating joint with a stop control device and a rod connected to the rotating joint with the stop control device.

[0024] This utility model employs a locking cavity between the connecting parts, which contains an elastic element, a locking element, and a pressing element. By pressing the pressing element, the locking element overcomes the elastic force of the elastic element and disengages from the locked position, thereby achieving instantaneous unlocking and free rotation of the rod assembly. The operation is simple, the unlocking operation is easy, and it can be quickly folded with one hand, improving efficiency.

[0025] This invention employs a locking element installed within the locking cavity, where both locking and unlocking occur. This ensures high reliability and prevents problems such as accidental disengagement leading to locking failure and knob loosening due to vibration.

[0026] In this invention, the locking component is subjected to the elastic force of the elastic component within the locking cavity. After the pressing component is released, the elastic component automatically pushes the locking component into the locking position, ensuring rigid locking of the rod assembly in the unfolded state and significantly enhancing its resistance to vibration and detachment. Furthermore, the locking component and elastic component are located within the locking cavity, reducing exposed parts, shrinking the joint volume, and improving folding compactness. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This utility model is a three-dimensional rotating connecting joint with a stop control device and a folding rod assembly (unlocked state). Figure 1 ;

[0029] Figure 2 This utility model is a three-dimensional rotating connecting joint with a stop control device and a folding rod assembly (unlocked state). Figure 2 ;

[0030] Figure 3 This is an exploded structural diagram of the rotating connecting joint and folding rod assembly with stop control device in this utility model;

[0031] Figure 4 The three-dimensional form of the first connecting member in this utility model Figure 1 ;

[0032] Figure 5 The three-dimensional form of the first connecting member in this utility model Figure 2 ;

[0033] Figure 6 The three-dimensional form of the second connecting member in this utility model Figure 1 ;

[0034] Figure 7The three-dimensional form of the second connecting member in this utility model Figure 2 ;

[0035] Figure 8 The three-dimensional locking component in this utility model Figure 1 ;

[0036] Figure 9 The three-dimensional locking component in this utility model Figure 2 ;

[0037] Figure 10 The three-dimensional pressing element in this utility model Figure 1 ;

[0038] Figure 11 The three-dimensional pressing element in this utility model Figure 2 ;

[0039] Figure 12 This is a perspective view of the hinged reinforcing plate in this utility model;

[0040] Figure 13 This is a top view of the rotating connection joint with a stop control device in the unlocked state of this utility model.

[0041] Figure 14 for Figure 13 A sectional view taken along the A-A direction;

[0042] Figure 15 This utility model is a three-dimensional rotating connecting joint with a stop control device and a folding rod assembly (locked state). Figure 3 ;

[0043] Figure 16 This utility model is a three-dimensional rotating connecting joint with a stop control device and a folding rod assembly (locked state). Figure 4 ;

[0044] Figure 17 This is a top view of the rotating connection joint with a stop control device in the locked state of this utility model.

[0045] Figure 18 for Figure 17 A cross-sectional view of the structure taken along the B-B direction.

[0046] In the figure: 100, rotating connecting joint with stop control device; 110, first connecting piece; 120, second connecting piece; 111, interface; 112, circular structure; 113, protruding post; 121, limiting plate; 114, through hole; 100a, locking cavity; 100b, pressing cavity; 115, mounting groove; 130, locking piece; 131, spring groove; 132, clearance hole; 133, protrusion; 140, pressing piece; 141, cap part; 142, pressing foot; 1421, limiting protrusion; 150, elastic element; 160, hinge reinforcing plate; 200, rod. Detailed Implementation

[0047] The present invention will now be described in further detail with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0048] It should be noted that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0050] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0051] In the above description, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0052] Figure 1 This is a schematic diagram of the folding rod assembly with a stop control device for the rotating connecting joint in this utility model.

[0053] like Figures 1 to 18 As shown, the folding rod assembly with a rotating connecting joint with a stop control device includes a rotating connecting joint 100 with a stop control device and rods 200. The rods 200 are connected to the rotating connecting joint 100 with a stop control device, and the rods 200 can rotate relative to each other through the rotating connecting joint 100 with a stop control device. The rods 200 can also be locked together through the rotating connecting joint 100 with a stop control device, so that the rods 200 can be folded and unfolded.

[0054] refer to Figure 1 , Figure 2 and Figure 3 The rotating connecting joint 100 with a stop control device includes a first connecting member 110, a second connecting member 120, a locking member 130, a pressing member 140, and an elastic member 150.

[0055] See Figures 4 to 14 The first connector 110 and the second connector 120 are rotatably connected, and both the first connector 110 and the second connector 120 are provided with an interface 111 for connecting the rod 200.

[0056] Specifically, in this embodiment, one end of the first connector 110 and the second connector 120 is set as a circular structure 112, and the other end extends out an interface 111 whose shape is adapted to the shape of the rod 200. When the first connector 110 and the second connector 120 are connected, they are coaxially set at the end of the circular structure 112 and connected by bolts. The bolts do not lock the first connector 110 and the second connector 120. The first connector 110 and the second connector 120 can also rotate relative to each other, so that the rod 200 connected between the first connector 110 and the second connector 120 can be folded or unfolded relative to each other, that is, the first connector 110 and the second connector 120 are hinged.

[0057] Preferably, one of the first connecting member 110 and the second connecting member 120 is provided with a protrusion 113, and the other is provided with a limiting plate 121. Both the protrusion 113 and the limiting plate 121 are provided with through holes 114. When the first connecting member 110 and the second connecting member 120 are connected, the through holes 114 on the protrusion 113 and the through holes 114 on the limiting plate 121 correspond. A bolt passes from the outside of the first connecting member 110 or the second connecting member 120 into the protrusion 113, and passes through the through hole 114 of the limiting plate 121 to engage with a nut, thereby connecting the first connecting member 110 and the second connecting member 120 to each other. Specifically, in this embodiment, the first connecting member 110 is provided with a protrusion 113, and the second connecting member 120 is provided with a limiting plate 121.

[0058] Preferably, when the first connector 110 and the second connector 120 are connected, each is provided with a hinged reinforcing plate 160. One end of the hinged reinforcing plate 160 is connected to the interface 111 of the first connector 110 or the second connector 120, and the other end is connected to the connection point of the first connector 110 and the second connector 120. Specifically, refer to... Figure 2 and Figure 12 The hinge reinforcement plate 160 has two pieces, one end of which is connected to the interface 111 of the first connector 110 and the second connector 120, and the other end is connected to the circular structure 112 end of the first connector 110 and the second connector 120, which can strengthen the connection between the first connector 110 and the second connector 120; and the hinge reinforcement plate 160 can be rotatably connected to the connection of the first connector 110 and the second connector 120, so that the hinge reinforcement plate 160 will not affect the mutual rotation of the first connector 110 and the second connector 120. Through the hinge reinforcement plate 160, the hinge between the first connector 110 and the second connector 120 can be strengthened, and the first connector 110 and the second connector 120 can be prevented from separating.

[0059] When the first connector 110 and the second connector 120 are connected to each other, a locking cavity 100a is formed. The elastic member 150 and the locking member 130 are installed in the locking cavity 100a at the connection between the first connector 110 and the second connector 120. The locking member 130 has a locked position and an unlocked position in the locking cavity 100a. The locking member 130 can move between the locked position and the unlocked position to lock or unlock the first connector 110 and the second connector 120, so that the rod 200 connected between the first connector 110 and the second connector 120 can rotate relative to each other. The elastic member 150 is disposed in the locking cavity 100a and abuts against the locking member 130, and can generate elastic force on the locking member 130 to keep the locking member 130 in the locked position. Preferably, the elastic member 150 is sleeved on the protrusion 113.

[0060] Figure 14 , Figure 18 As shown, one of the first connector 110 and the second connector 120 is further provided with a pressing cavity 100b. A pressing member 140 is installed in the pressing cavity 100b. The pressing member 140 includes a first part and a second part. The first part of the pressing member 140 abuts against the locking member 130 in the locking cavity 100a. The second part is exposed from one of the first connector 110 and the second connector 120 for being pressed from the outside. When the pressing member 140 is pressed, it abuts against the locking member 130, causing the locking member 130 to overcome the elastic force of the elastic member 150 and move from the locked position to the unlocked position, so that the first connector 110 and the second connector 120 can rotate relative to each other. When the pressing member 140 is released, the locking member 130 moves from the unlocked position to the locked position under the elastic force of the elastic member 150, and the first connector 110 and the second connector 120 are locked and cannot rotate relative to each other.

[0061] Specifically, in this embodiment, both the first connector 110 and the second connector 120 have mounting grooves 115 on the ends of the circular structure 112. When the first connector 110 and the second connector 120 are connected to each other, the mounting grooves 115 of the first connector 110 and the second connector 120 correspond to each other and form a locking cavity 100a for accommodating the locking member 130. The locking member 130 is shaped to fit the mounting groove 115 and has a protrusion 133. The protrusion 133 can be installed in the mounting groove 115 and can move within the mounting groove 115, thereby allowing the locking member 130 to move within the locking cavity 100a. When the protrusion 133 of the locking member 130 is completely located within the mounting groove 115 of either the first connector 110 or the second connector 120 within the locking cavity 100a, the locking member 130 is in the unlocked position (unlocked state), while the locking member 130 is in the locked state. When part 0 is located within the mounting groove 115 of the first connector 110 and part is located within the mounting groove 115 of the second connector 120, that is, when the protrusion 133 is located between the mounting groove 115 of the first connector 110 and the mounting groove 115 of the second connector 120, the locking member 130 is in the locked position (in a locked state). The first connector 110 and the second connector 120 are blocked by the locking member 130 and cannot rotate relative to each other. The first connector 110 and the second connector 120 are locked together.

[0062] Preferably, the elastic element 150 is a spring, and a spring groove 131 is provided on one side of the locking element 130. When both the locking element 130 and the elastic element 150 are installed in the locking cavity 100a, the locking element 130 is sleeved on one end of the elastic element 150 through the spring groove 131, and the other end of the elastic element 150 abuts against the side wall of the locking cavity 100a (the bottom of the mounting groove 115 of the first connecting member 110 or the second connecting member 120), so that the elastic element 150 can generate a spring force on the locking element 130. Specifically, in this embodiment, the elastic element 150 is disposed in the first connecting member 110.

[0063] Preferably, the pressing member 140 is a circular cap structure, the second part of which is a cap portion 141 extending out of the locking cavity 100a, and the first part is two pressing feet 142 disposed below the cap portion 141. During installation, the pressing member 140 extends into the locking cavity 100a and abuts against the locking member 130 to press the locking member 130.

[0064] Preferably, see Figure 10 and Figure 11The pressing member 140 is further provided with a limiting protrusion 1421 for limiting the pressing member 140 from disengaging from the locking cavity 100a. Specifically, in this embodiment, the limiting protrusion 1421 is provided on the pressing foot 142, and both pressing feet 142 are provided with limiting protrusions 1421. The size of the two limiting protrusions 1421 is larger than the size of the mounting hole. During installation, the two pressing feet 142 can be pressed and moved relative to each other, so that the distance between the two limiting protrusions 1421 becomes smaller, allowing the pressing foot 142 to be installed into the locking cavity 100a through the mounting hole. When not pressed, the distance between the two pressing feet 142 returns to normal, and the distance between the limiting protrusions 1421 is larger than the size of the mounting hole, thus limiting the pressing foot 142 and preventing the pressing foot 142 from disengaging.

[0065] Preferably, the pressing member 140 extends at least partially from one of the limiting plates 121 provided in the first connecting member 110 and the second connecting member 120. The width of the limiting plate 121 is slightly smaller than the width between the two pressing feet 142. When the pressing feet 142 are inserted into the locking cavity 100a, they are located on both sides of the limiting plate 121. Due to the action of the limiting plate 121, the two pressing feet 142 inserted into the locking cavity 100a are difficult to move relative to each other, so that the limiting protrusion 1421 can always limit the pressing feet 142 within the locking cavity 100a.

[0066] See Figure 13 and Figure 14 When the pressing member 140 is pressed, the locking member 130 can overcome the elastic force of the elastic member 150. The locking member 130 is completely located within the first connecting member 110 or the second connecting member 120. The first connecting member 110 and the second connecting member 120 are not locked together and can rotate relative to each other; see reference. Figures 15 to 18 When the pressing member 140 is not pressed, the locking member 130 is partially located in the mounting groove 115 of the first connecting member 110 and partially located in the mounting groove 115 of the second connecting member 120 under the action of the elastic member 150. When this is the case, the locking member 130 is in the locked position, and the first connecting member 110 and the second connecting member 120 are locked.

[0067] Preferably, the locking member 130 is further provided with a clearance hole 132 to allow the protrusion 113 to pass through. When the locking member 130 is installed in the locking cavity 100a, the protrusion 113 passes through the clearance hole 132, and the locking member 130 can also rotate around the protrusion 113.

[0068] The rod 200 is a straight rod or an irregular rod, and one end of it is provided with a first fixing hole. The interface 111 of the first connector 110 and the second connector 120 is also provided with a second fixing hole. When the rod 200 is inserted into the interface 111 of the first connector 110 or the second connector 120, it can be fixed with bolts through the first fixing hole and the second fixing hole, so that the rod 200 can be fixed to the first connector 110 or the second connector 120.

[0069] In use, the folding rod assembly with the stop control device on the rotating connecting joint 100 can be used on a folding chair. The rod assembly serves as a support frame for the folding chair. When the folding chair needs to be unfolded, the rod 200 connected to the first connecting member 110 and the second connecting member 120 is unfolded to 180 degrees. At this time, the locking member 130 is in the locked position in the locking cavity 100a. When the folding chair needs to be folded, the pressing member 140 is pressed, and the pressing member 140 presses the locking member 130, placing it in the unlocked position in the locking cavity 100a. The position allows the rods 200 connected to the first connector 110 and the second connector 120 to rotate relative to each other. At this time, the mounting grooves 115 of the first connector 110 and the second connector 120 do not correspond. The locking member 130 is pressed by the pressing member 140 and overcomes the elastic force of the elastic member 150, falling into the mounting groove 115 of one of the first connector 110 and the second connector 120. The rods 200 of the first connector 110 and the second connector 120 can rotate freely, folding the folding chair.

[0070] Understandably, multiple sets of folding rod assemblies with rotating connecting joints 100 and stop control devices can be installed in folding chairs as needed.

[0071] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A rotary connection joint with a stop control device, characterized in that include: A first connector and a second connector are rotatably connected, and a locking cavity is provided between the first connector and the second connector; The first connector or the second connector has a pressing cavity; A locking element is installed in the locking cavity, and the locking element has a locked position and an unlocked position in the locking cavity; when the locking element is in the locked position, the first connecting element and the second connecting element do not rotate relative to each other; When the locking member is in the unlocked position, the first connecting member and the second connecting member rotate relative to each other. An elastic element is installed in the locking cavity, and the elastic element abuts against the locking element, so that the locking element is in the locked position; A pressing element is installed in the pressing cavity, with a first part of the pressing element abutting against the locking element in the locking cavity, and a second part exposed from the first connecting element or the second connecting element. When the pressing member is pressed, the locking member is in the unlocked position; when the pressing member is released, the locking member is in the locked position.

2. The revolute joint with stop control device according to claim 1, characterized in that, Both the first connector and the second connector are provided with mounting grooves. When the first connector and the second connector are connected to each other, the mounting grooves of the first connector and the second connector are in corresponding positions. The locking member has a protrusion that can slide in the mounting grooves of the first connector and the second connector. When the locking member is in the locked position, the protrusion is completely located within the mounting groove of one of the first connector and the second connector; When the locking member is in the unlocked position, the protrusion is located between the mounting groove of the first connector and the mounting groove of the second connector.

3. The revolute joint with stop control device according to claim 1, characterized in that, One of the first connector and the second connector is provided with a limiting plate with a through hole, and the other is provided with a protrusion with a through hole. The first connector and the second connector are connected to the limiting plate through the through hole by bolts passing through the protrusion.

4. The revolute joint with stop control device according to claim 3, characterized in that, The locking member is provided with a clearance hole. When the locking member is installed in the locking cavity, the locking member is sleeved on the outside of the protruding post through the clearance hole.

5. The revolute joint with stop control device according to claim 3, characterized in that, The second part of the pressing member is a cap portion exposed outside the pressing cavity, and the first part is a pressing foot that extends into the locking cavity and abuts against the locking member.

6. The revolute joint with stop control device according to claim 5, characterized in that, The end of the pressing foot is provided with a limiting protrusion to prevent the pressing member from dislodging from the locking cavity.

7. The revolute joint with stop control device according to claim 6, characterized in that, Two pressing feet are provided. When the pressing feet are inserted into the locking cavity, the limiting plate is located between the two pressing feet, preventing the two pressing feet from moving relative to each other.

8. The revolute joint with stop control device according to any one of claims 1-7, characterized in that, Both the first connector and the second connector are provided with interfaces for connecting rods.

9. The revolute joint with stop control device according to any one of claims 1-7, characterized in that, It also includes two hinged reinforcing plates that are hinged to each other, and the two hinged reinforcing plates are respectively connected to the first connector and the second connector.

10. A folding pole set with a swivel joint having a stop control device, characterized in that It includes the rotary connecting joint with stop control device as described in any one of claims 1 to 9 and the rod connected to the rotary connecting joint with stop control device.

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