Indoor horizontal bar

Abstract

The utility model belongs to the single pole technical field especially relates to an indoor single pole. An indoor single pole, including single pole lever body and being located the support seat of single pole lever body both ends, the support seat includes: the mounting seat, its fixed connection in the end of single pole lever body, the center of the axial outer end of mounting seat is equipped with the complete convex conical surface or convex spherical surface that protrudes outward, the non -skid pad, its be equipped with the axial outside of mounting seat and be used for with wall contact, the connecting seat, its be equipped with between non -skid pad and mounting seat, the axial one end of non -skid pad and the connecting seat between the connecting structure that realizes both fixed, the axial other end of connecting seat is equipped with and the recessed conical surface or recessed spherical surface of convex conical surface or convex spherical surface adaptation and mutual abutment, the mounting seat and the connecting seat between the elastic piece or magnetic attraction piece are equipped with. The utility model has the advantage that the stress is more stable, makes the better advantage of security.

Description

Technical Field

[0001] This utility model belongs to the field of horizontal bar technology, and in particular relates to an indoor horizontal bar. Background Technology

[0002] Current single-bar products generally use a double-sloping groove structure to achieve the self-locking function, but this has significant limitations in the installation process: the groove must be installed with the groove pointing strictly vertically downwards; otherwise, effective locking cannot be achieved. This directional installation requirement is extremely inconvenient in actual operation and seriously affects the user experience.

[0003] Chinese patent application number 202120961812.8 discloses a fixing structure for a single bar mounting base on a door. Although the patent proposes an improved solution to achieve multi-directional installation through a conical surface mating fastener structure, its core structure still has some defects: the center of the conical surface of the fastener and the single bar base is provided with a mushroom-shaped buckle and a round hole groove, which causes a structural interruption in the contact surface, destroys the continuous force transmission path of the conical surface of the fastener, and thus reduces the structural stability.

[0004] Therefore, users may experience unstable force when using the device, especially when making large swinging movements (such as using the horizontal bar as a swing) or making large circular swings at large angles, making it difficult to ensure safety. Utility Model Content

[0005] To address the shortcomings of existing technologies, an indoor horizontal bar is provided that offers greater stability under stress and improved safety.

[0006] This utility model is achieved using the following technical solution: an indoor horizontal bar, comprising a single lever body and support seats disposed at both ends of the single lever body, wherein the support seats include:

[0007] The mounting base is fixedly connected to the end of the single lever body. The center of the axial outer end of the mounting base is provided with an outwardly protruding complete convex cone surface or convex spherical surface, or the center of the axial outer end of the mounting base is provided with an inwardly recessed complete concave cone surface or concave spherical surface.

[0008] Anti-slip pad, which is located on the axial outer side of the mounting base and is used to contact the wall;

[0009] A connecting seat is provided between an anti-slip pad and a mounting seat. One axial end of the anti-slip pad is provided with a connecting structure to fix the two together. The other axial end of the connecting seat is provided with a concave conical surface or concave spherical surface that is adapted to and abuts against the convex conical surface or convex spherical surface of the mounting seat, or a convex conical surface or convex spherical surface that is adapted to and abuts against the concave conical surface or concave spherical surface of the mounting seat.

[0010] An elastic element is provided between the mounting base and the connecting base to ensure that the convex conical surface or convex spherical surface of the mounting base and the concave conical surface or concave spherical surface are in close contact; or

[0011] A magnetic attraction element is provided between the mounting base and the anti-slip pad or connecting base to ensure that the convex conical surface or convex spherical surface of the mounting base and the concave conical surface or concave spherical surface are tightly attached.

[0012] In this design, the convex conical or convex spherical surface is a complete surface. Users are not required to install it in any particular direction, and the contact area with the concave conical or spherical surface is larger, resulting in more stable force distribution. Furthermore, this design uses magnetic or elastic components to secure the mounting base, connecting base, and anti-slip pad, thus preserving the integrity of the convex or convex conical or concave surface on the mounting base, further increasing the contact area and ensuring more stable force distribution.

[0013] The elastic element and the magnetic element are used to ensure the fixation between the mounting base and the connecting base when the horizontal bar is not in use.

[0014] Preferably, the fixed connection structure between the connecting seat and the anti-slip pad includes a filling groove on the connecting seat and a filling part on the anti-slip pad, wherein the end face of the filling part abuts against the end face of the filling groove and the two are tightly fitted together.

[0015] Solid filling is used between the connector and the anti-slip pad to make the force transmission more stable and safer.

[0016] Preferably, the filling part is a split structure, which includes a plurality of filling blocks evenly spaced along the circumferential direction. The filling grooves correspond one-to-one with each filling block and are evenly spaced along the circumferential direction on the connecting seat. The axes of the plurality of filling blocks arranged along the circumferential direction are coaxial with the axis of the concave conical surface or concave spherical surface.

[0017] By setting the filling part as multiple filling blocks, which can be tightly fitted with multiple filling slots, the contact area between the connecting seat and the anti-slip pad is increased, allowing for better force transmission. The convex conical or spherical surface transmits force to the concave conical or spherical surface. Coaxially arranging the circumference of the filling blocks with the concave conical or spherical surface achieves uniform force distribution, further enhancing force transmission.

[0018] Preferably, the filler block is wedge-shaped, with its end face in the axial direction being an inclined surface or an arc surface. The inclined surfaces or arc surfaces of all the filler blocks together form a combined surface that is adapted to and parallel to the taper of the concave cone or the arc of the concave spherical surface.

[0019] The above design allows for better and more even force transmission to the filler block from the concave conical or spherical surface. Furthermore, because the taper of the combined surface is parallel to the concave conical surface or the curvature of the concave spherical surface, the thickness between the filling groove of the connecting seat and the concave conical surface is uniform, ensuring better stability and more even force transmission. The rounded corners of the filler block's circumferential outer wall facilitate insertion into the filling groove and prevent deformation and jamming under pressure.

[0020] Preferably, the filling block has a raised step structure on its radially outer outer wall, and the filling groove has a complementary concave step structure on its groove wall corresponding to the raised step structure. When the filling block and the filling groove are engaged, the raised step structure and the concave step structure abut against each other.

[0021] The contact between the convex and concave steps allows for better force transmission between the filler block and the filler groove.

[0022] Preferably, the number of elastic elements is multiple and they are evenly arranged in the circumferential direction; the mounting base is equipped with a pressure ring, the mounting base has a stepped surface that abuts against the pressure ring, and the elastic elements are directly connected to the pressure ring, so that the pressure ring applies axial pressure to the mounting base, so that the convex conical surface or convex spherical surface between the mounting base and the connecting base is in close contact with the concave conical surface or concave spherical surface.

[0023] By incorporating a pressure ring, the elastic force of the elastic element can be converted into axial pressure on the mounting base, resulting in a more uniform force distribution on the mounting base. Furthermore, the pressure ring is annular and abuts against the stepped surface of the mounting base, thus the two are rotatably connected. Therefore, rotation of the mounting base during use will not affect the elastic element, thereby preventing the elastic element from becoming entangled.

[0024] Preferably, the mounting base has an annular portion that extends axially and abuts against the connecting base. The connecting base has a plurality of circumferentially evenly spaced wedge-shaped blocks. Each wedge-shaped block has an inclined surface or an arc surface facing the mounting base. The taper of the inclined surface is the same as the taper of the concave conical surface, or the arc surface has the same arc surface as the arc surface.

[0025] When a user uses the horizontal bar, the bar slides 360° in all directions, causing misalignment between the convex and concave conical surfaces, or the convex and concave spherical surfaces, resulting in increased pressure and thus increased friction. An annular portion is provided on the mounting base, and a wedge-shaped block is provided on the connecting base to contact and abut against the annular portion. During user use, even when the mounting base slides, a portion of the annular portion always remains in contact with the wedge-shaped block, ensuring the stability of the mounting base and allowing for better transmission of force to the connecting base.

[0026] Preferably, the mounting base is equipped with an outer cover, the mounting base is located inside the outer cover, and a positioning post and a positioning hole into which the positioning post is inserted are provided between the outer cover and the connecting base to realize the connection between the outer cover and the connecting base. The end of the elastic element connected to the connecting base is fixed to the positioning post.

[0027] The mounting base can be housed within the outer cover, resulting in a more aesthetically pleasing structure and preventing it from being exposed. Furthermore, the positioning pin between the outer cover and the connecting base secures one end of the elastic element, making the structure more compact.

[0028] Preferably, the magnetic attractor includes a first magnet and a second magnet; the connecting seat has a mating hole at its center, the anti-slip pad has a protrusion extending into the mating hole, and the first magnet is embedded in the protrusion; the mounting seat has a second magnet embedded at the other end away from the connecting seat, which is magnetically attracted to the first magnet.

[0029] The first and second magnets ensure that the mounting base, connecting base, and anti-slip pad remain in a state of not falling off or detaching from each other when installed on a door or wall without support.

[0030] Preferably, the mounting base has an annular mounting groove with a lateral opening on its axial outer end; the anti-slip pad has a connecting part that fits tightly with the annular mounting groove, and the end face of the annular mounting groove abuts against the end face of the connecting part.

[0031] The anti-slip pad is provided with a receiving groove for accommodating the connecting seat. The groove wall is tightly fitted with the outer wall of the connecting seat and their end faces abut against each other. The filling block is disposed in the receiving groove.

[0032] The mounting base and the anti-slip pad are tightly fitted together via a connecting part and an annular mounting groove, with the end face of the annular mounting groove abutting against the end face of the connecting part. This achieves uniform multi-directional load transfer under stress, eliminating assembly gaps in traditional structures, avoiding micro-displacement under dynamic loads, and enhancing safety. The anti-slip pad has a receiving groove to fix the connecting base, and the abutting between the end face of the connecting base and the end face of the receiving groove ensures a continuous and complete force transmission path.

[0033] Compared with existing technologies, the advantages of this invention are: the convex conical surface or convex spherical surface in this solution is a complete surface, which eliminates the user's requirements for installation direction and provides a larger contact area with the concave conical surface or concave spherical surface, resulting in more stable force distribution. The mounting base and connecting base are fixed using magnetic or elastic components, which, compared with prior art, does not damage the integrity of the convex conical surface or convex spherical surface, thus improving force transmission.

[0034] The filling groove and filling block between the connector and the anti-slip pad are tightly fitted and have end face contact, thus ensuring a continuous and complete force transmission path. Compared to the prior art, this solution uses solid filling between the connector and the anti-slip pad, as well as between the anti-slip pad and the mounting base, making force transmission more stable and safer. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of the single bar in Embodiment 1 of the utility model;

[0036] Figure 2 for Figure 1 A sectional view;

[0037] Figure 3 for Figure 2 Enlarged view of the central support base;

[0038] Figure 4 This is an exploded view of the support base of Example 1;

[0039] Figure 5 This is an exploded view of the support base of Embodiment 1 from another perspective;

[0040] Figure 6 This is a schematic diagram of the anti-slip pad and connecting seat in Example 1;

[0041] Figure 7 This is a schematic diagram of the support base in Example 2;

[0042] Figure 8 for Figure 7 Exploded view;

[0043] Figure 9 for Figure 7 Schematic diagram of the structure after removing the outer cover;

[0044] Figure 10 This is a structural diagram of the mounting base and the connecting base;

[0045] Figure 11 This is a schematic diagram of the internal structure of the outer casing;

[0046] Figure 12 for Figure 7 A sectional view.

[0047] Reference numerals: 1. Single lever body; 11. Rotating rod; 12. Telescopic rod; 13. Lead screw; 14. Lead screw nut; 2. Support seat; 3. Mounting seat; 31. Convex conical surface; 32. Clearance groove; 33. Annular mounting groove; 34. Stepped surface; 35. Annular part; 4. Anti-slip pad; 41. Connecting part; 42. Filler block; 421. Inclined surface; 422. Convex step structure; 43. Convex column; 44. Receiving groove; 5. Connecting seat; 51. Concave conical surface; 52. Through hole; 53. Filler groove; 54. Concave step structure; 55. Large diameter plate; 56. Small diameter plate; 57. Positioning hole; 58. Wedge block; 61. First magnet embedding groove; 62. Second magnet embedding groove; 7. Pressure ring; 8. Elastic element; 9. Outer cover; 91. Positioning column. Detailed Implementation

[0048] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0049] like Figure 1 and Figure 2 As shown, this embodiment discloses an indoor horizontal bar, including a single lever body 1. The single lever body 1 includes a rotating rod 11 located in the middle part and telescopic rods 12 sleeved and fitted at both ends of the rotating rod 11. The telescopic rods 12 and the rotating rod 11 are connected by a lead screw 13. The telescopic rod 12 is provided with a lead screw nut 14 that is threaded and fitted with the lead screw 13. When the rotating rod 11 rotates, the two telescopic rods 12 can move closer to each other or further away from each other.

[0050] like Figures 3 to 6 As shown, a support base 2 is connected to the outer end of the telescopic rod 12. The support base 2 is used to support the door frame or wall surface. The support base 2 includes a mounting base 3, a connecting base 5, and an anti-slip pad 4 in sequence from the end near the rotating rod 11 to the end away from the rotating rod 11. The mounting base 3 is provided with a plug hole for the telescopic rod 12 to be inserted. The inner wall of the plug hole and the outer wall of the telescopic rod 12 are provided with any existing structure to prevent relative rotation between the two, such as a D-shaped plug hole or a spline groove plug hole type, etc.

[0051] Both the mounting base 3 and the connecting base 5 are made of rigid plastic material, while the anti-slip pad 4 is made of flexible rubber material. The end of the mounting base 3 facing away from the telescopic rod 12 has a groove-shaped structure for mounting the connecting base 5 and the anti-slip pad 4. The groove-shaped structure includes an annular mounting groove 33 opening outwards and a clearance groove 32. The connecting base 5 is tightly fitted onto the anti-slip pad 4, which has a protruding cylindrical connecting part 41. The cylindrical connecting part 41 and the annular mounting groove 33 are tightly fitted together by an insertion method, and the end face of the connecting part 41 abuts against the end face of the annular mounting groove 33.

[0052] The anti-slip mat 4 has an axially open receiving groove 44 at the center of its axial inner end face. The connecting seat 5 is located in the receiving groove 44, and the groove wall of the receiving groove 44 is tightly fitted with the circumferential outer wall of the connecting seat 5, with their end faces abutting against each other. A fixed connection structure is provided between the connecting seat 5 and the receiving groove 44. The fixed connection structure includes a filling groove on the connecting seat 5 and a filling part in the receiving groove 44. The filling part is a split structure, which includes eight filling blocks 42 that are evenly spaced along the circumferential direction and are wedge-shaped. The filling groove 53 corresponds one-to-one with each filling block 42 and is evenly spaced along the circumferential direction on the connecting seat 5. The filling blocks 42 are tightly fitted with the filling groove 53, and the axial end face of the filling block 42 abuts against the bottom surface of the filling groove 53.

[0053] The corners of the outer circumferential wall of the filling block 42 are rounded. The outer wall of the filling block 42 is provided with a raised step structure 422, and the groove wall of the filling groove 53 is provided with a complementary concave step structure 54 corresponding to the raised step structure 422. When the filling block 42 and the filling groove 53 are engaged, the raised step structure 422 and the concave step structure 54 abut against each other.

[0054] The clearance groove 32 is located on the central end face of the annular mounting groove 33, and the bottom end face of the clearance groove 32 is a complete convex conical surface 31 structure that protrudes outward. The connecting seat 5 includes a large-diameter disc 55 with a larger diameter and a small-diameter disc 56 with a smaller diameter than the large-diameter disc 55. The small-diameter disc 56 and the large-diameter disc 55 are integrally formed. The small-diameter disc 56 is located at the center of the large-diameter disc 55 and protrudes outward. The axial end face of the small-diameter disc 56 is provided with a concave conical surface 51 that is adapted to the convex conical surface 31. The small-diameter disc 56 extends into the clearance groove 32. The diameter of the small-diameter disc 56 is smaller than the diameter of the clearance groove 32, so that when the single lever body is subjected to force, the convex conical surface 31 and the concave conical surface 51 can slide relative to each other, thereby generating a larger preload force.

[0055] The axis of the filler blocks 42 arranged circumferentially is coaxial with the axis of the concave conical surface 51. The axial end face of the filler blocks 42 is an inclined surface 421. The inclined surfaces 421 of all the filler blocks 42 together form a combined surface that is parallel to and matches the taper of the concave conical surface 51. This ensures that the thickness between the bottom of the filling groove 53 of the connecting seat 5 and the concave conical surface 51 is uniform, guaranteeing effective force transmission.

[0056] The center of the connecting seat 5 is provided with a mating hole, which is an axial through hole 52. The anti-slip pad 4 is provided with a protrusion 43 extending into the through hole 52. The protrusion 43 is provided with a first magnet embedding groove 61, and a first magnet (not shown in the figure) is embedded in the first magnet embedding groove 61. The other end of the mounting seat 3 away from the convex cone surface 31 is provided with a second magnet embedding groove 62, and a second magnet (not shown in the figure) is embedded in the second magnet embedding groove 62. The second magnet is magnetically attracted to the first magnet.

[0057] In some other embodiments, the convex conical surface can be replaced by a convex spherical surface, the concave conical surface can be replaced by a concave spherical surface that is compatible with the convex spherical surface, and the inclined surface of the filling block can be replaced by an arc surface with the same curvature as the concave spherical surface.

[0058] Example 2

[0059] like Figures 7 to 12 As shown, the difference between Embodiment 2 and Embodiment 1 is that in Embodiment 2, the connecting seat 5 and the anti-slip pad 4 are tightly fitted and fixed using an existing plug-in connection method. Furthermore, the diameter of the connecting seat 5 is the same as the diameter of the anti-slip pad 4. The mounting base 3 is equipped with an outer cover 9, the diameter of which is the same as the diameter of the connecting seat 5. An axially extending positioning post 91 is provided inside the outer cover 9. The connecting seat 5 has a positioning hole 57 for the positioning post 91 to be inserted. The positioning post 91 is hollow, and after the positioning post 91 is inserted into the positioning hole 57, a screw (not shown in the figure) is screwed into the positioning hole 57 and the positioning post 91, thereby completing the fixation of the connecting seat 5 and the outer cover 9.

[0060] The mounting base 3 is located inside the outer cover 9. The outer cover 9 has a hollow center, allowing the end of the telescopic rod 12 to pass through the outer cover 9 and connect to the mounting base 3. The mounting base 3 is fitted with a pressure ring 7, and the mounting base 3 has a stepped surface 34 that abuts against the pressure ring 7. The pressure ring 7 is fitted onto the stepped surface 34. Three elastic elements 8 are evenly spaced along the circumferential direction at the outer edge of the pressure ring 7. One end of each elastic element 8 is connected to the positioning post 91, and the other end is connected to the pressure ring 7, so that the pressure ring 7 applies axial pressure to the mounting base 3, causing the convex conical surface 31 of the mounting base 3 to fit tightly against the concave conical surface 51 of the connecting seat 5.

[0061] In this embodiment 2, the elastic element 8 is a conventional spring with hooks or loops at both ends. The hooks or loops hook onto the positioning post 91 and the hook holes around the periphery of the pressure ring 7. The elastic element 8 can also be a flexible elastic band, rubber band, or other elastic component.

[0062] The mounting base 3 has an axially extending annular portion 35 that abuts against the connecting base 5. The connecting base 5 has a plurality of circumferentially evenly spaced wedge-shaped blocks 58, each wedge-shaped block 58 having an inclined surface facing the mounting base 3, the taper of which is the same as the taper of the concave conical surface 51. When the mounting base 3 slides, the annular portion 35 also slides, and a portion of the annular portion 35 contacts the inclined surface of the wedge-shaped block 58. Furthermore, there is a certain distance between the inner wall of the annular portion 35 and the cone with the concave conical surface 51 of the connecting base 5, so the entire mounting base 3 has a larger sliding space and better self-adaptive capability.

[0063] In this embodiment 2, a filling block and a filling groove may be provided between the connecting seat 5 and the anti-slip pad 4, or they may not be provided.

[0064] In some other embodiments, the convex and concave conical surfaces described above can be arranged in opposite directions, that is, a complete concave conical surface or concave spherical surface is provided on the mounting base, and a matching convex conical surface or convex spherical surface is provided on the connecting base.

Claims

1. An indoor horizontal bar, comprising a single lever body and support seats disposed at both ends of the single lever body, characterized in that, The support base includes: The mounting base is fixedly connected to the end of the single lever body. The center of the axial outer end of the mounting base is provided with an outwardly protruding complete convex cone surface or convex spherical surface, or the center of the axial outer end of the mounting base is provided with an inwardly recessed complete concave cone surface or concave spherical surface. Anti-slip pad, which is located on the axial outer side of the mounting base and is used to contact the wall; A connecting seat is provided between an anti-slip pad and a mounting seat. One axial end of the anti-slip pad is provided with a connecting structure to fix the two together. The other axial end of the connecting seat is provided with a concave conical surface or concave spherical surface that is adapted to and abuts against the convex conical surface or convex spherical surface of the mounting seat, or a convex conical surface or convex spherical surface that is adapted to and abuts against the concave conical surface or concave spherical surface of the mounting seat. An elastic element is provided between the mounting base and the connecting base to ensure that the convex conical surface or convex spherical surface of the mounting base and the concave conical surface or concave spherical surface are in close contact; or A magnetic attraction element is provided between the mounting base and the anti-slip pad or connecting base to ensure that the convex conical surface or convex spherical surface of the mounting base and the concave conical surface or concave spherical surface are tightly attached.

2. The indoor horizontal bar according to claim 1, characterized in that: The fixed connection structure between the connecting seat and the anti-slip pad includes a filling groove on the connecting seat and a filling part on the anti-slip pad, wherein the end face of the filling part abuts against the end face of the filling groove and the two are tightly fitted together.

3. The indoor horizontal bar according to claim 2, characterized in that: The filling part is a split structure, which includes multiple filling blocks evenly spaced along the circumferential direction. The filling grooves correspond one-to-one with each filling block and are evenly spaced along the circumferential direction on the connecting seat. The axes of the multiple filling blocks arranged along the circumferential direction are coaxial with the axis of the concave conical surface or concave spherical surface.

4. The indoor horizontal bar according to claim 3, characterized in that: The filler block is wedge-shaped, and its end face in the axial direction is a slope or arc surface. The slopes or arc surfaces of all the filler blocks together form a combined surface that is adapted to and parallel to the taper of the concave cone or the arc of the concave spherical surface.

5. The indoor horizontal bar according to claim 3, characterized in that: The filling block has a raised step structure on its radially outer outer wall, and the filling groove has a complementary concave step structure on its groove wall corresponding to the raised step structure. When the filling block and the filling groove are engaged, the raised step structure and the concave step structure abut against each other.

6. The indoor horizontal bar according to any one of claims 1 to 5, characterized in that: The number of elastic elements is multiple and they are evenly arranged in the circumferential direction; the mounting base is equipped with a pressure ring, the mounting base has a stepped surface that abuts against the pressure ring, the elastic elements are directly connected to the pressure ring, so that the pressure ring applies axial pressure to the mounting base, so that the convex conical surface or convex spherical surface between the mounting base and the connecting base is in close contact with the concave conical surface or concave spherical surface.

7. The indoor horizontal bar according to claim 6, characterized in that: The mounting base has an axially extending annular portion that abuts against the connecting base. The connecting base has a plurality of circumferentially evenly spaced wedge-shaped blocks. Each wedge-shaped block has an inclined surface or an arc surface facing the mounting base. The taper of the inclined surface is the same as the taper of the concave conical surface, or the arc surface has the same arc surface as the arc surface.

8. The indoor horizontal bar according to claim 6, characterized in that: The mounting base is equipped with an outer cover, and the mounting base is located inside the outer cover. A positioning post is provided between the outer cover and the connecting base to realize the connection between the outer cover and the connecting base, and a positioning hole into which the positioning post is inserted is provided. The end of the elastic element connected to the connecting base is fixed to the positioning post.

9. The indoor horizontal bar according to any one of claims 3 to 5, characterized in that: The magnetic attractor includes a first magnet and a second magnet; the center of the connecting seat is provided with a mating hole, the anti-slip pad is provided with a protrusion extending into the mating hole, and the first magnet is embedded on the protrusion; the other end of the mounting seat away from the connecting seat is provided with a second magnet that is magnetically attracted to the first magnet.

10. The indoor horizontal bar according to claim 9, characterized in that: The mounting base has an annular mounting groove with a lateral opening on its axial outer end; the anti-slip pad has a connecting part that fits tightly with the annular mounting groove, and the end face of the annular mounting groove abuts against the end face of the connecting part. The anti-slip pad is provided with a receiving groove for accommodating the connecting seat. The groove wall is tightly fitted with the outer wall of the connecting seat and their end faces abut against each other. The filling block is disposed in the receiving groove.

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