JP6864602B2 - Floor hinge - Google Patents

Description

The present invention relates to a floor hinge capable of exerting a back check function of delaying the door opening speed during a door opening operation from a predetermined door opening angle to a fully opened angle of the door.

Conventionally, a floor hinge that applies a back check force to a piston in order to perform a slow door opening operation between a predetermined door opening angle and a fully open angle has been known. For example, in Patent Document 1 below, a door opening rotation force is input to be converted into a linear motion of the piston, and the piston is moved forward so as to accumulate a return spring by the door opening operation, and the return spring is used. The piston is reactivated by the stored energy recovery force of, and the slow door opening is guaranteed in the range from the required door opening angle to the maximum door opening angle, and the door opening force of the required size or less is applied. Equipped with a back check function that locks the forward movement of the piston when trying to open the door rapidly, and allows the piston to move back when trying to open the door rapidly by applying an opening force larger than the required size. Floor hinges are disclosed. According to the floor hinge disclosed in Patent Document 1 below, it is possible to avoid the rapid full opening of the door and avoid the burden on the output shaft and the fixed portion of the door. It is said that damage to the glass and other door members provided on the door can be avoided.

Registered Utility Model No. 2557385

However, in the floor hinge disclosed in Patent Document 1 described above, since it is necessary to provide a dedicated configuration for strengthening the back check force, it is necessary to provide a new member, a hydraulic oil flow path, or the like, and the device. This led to an increase in size and cost. That is, in this kind of technical field, there has been a demand for the realization of a new floor hinge that can enhance the back check force without adding a new mechanism or significantly increasing the cost.

The present invention has been made in view of the above-mentioned problems existing in the prior art, and an object of the present invention is to make no significant structural changes to the conventional floor hinges and to significantly increase the cost. The purpose is to provide floor hinges with enhanced back-checking power without increasing.

Hereinafter, the present invention will be described. Reference numbers in the accompanying drawings are added in parentheses to facilitate understanding of the present invention, but the present invention is not limited to the illustrated form.

The floor hinge (10) according to the present invention is arranged on one end side of a hinge case (11) provided with an oil chamber (12) filled with hydraulic oil, and is connected to a door. A rotating shaft (14) that rotates with the opening / closing operation of the door, a non-circular cam member (15) that is fixedly installed on the rotating shaft (14), and an outer peripheral surface of the cam member (15). A slide plate (17) and a slide plate (17) that reciprocate in the hinge case (11) according to the rotational movement of the cam member (15) by providing a cam follower (16) arranged so as to be slidable. The rod member (18) connected to the rod member (18) and the end of the rod member (18) opposite to the slide plate (17) connecting side, and the oil chamber (12) is used as the first oil chamber (1). The hinge case forming the oil chamber (12) and the piston member (19) which is divided into 12a) and the second oil chamber (12b) and is reciprocally installed in the oil chamber (12). By being arranged between the stopper-shaped portion (11a) formed on the inner wall surface of (11) and the piston member (19), an urging force in a constant direction is always exerted on the piston member (19). Adjusting the amount of hydraulic oil that moves between the first oil chamber (12a) and the second oil chamber (12b) that accompanies the reciprocating movement of the main spring (31) and the piston member (19). A floor hinge (10) including a control mechanism unit (13a, 13b, 13c) for controlling the moving speed of the piston member (19) and thus controlling the opening speed or closing speed of the door. A certain amount or more of the door is opened on the inner diameter side of the main spring (31) so as to exert a back check function that delays the door opening speed during the door opening operation from a predetermined opening angle to the fully opened angle of the door. It is characterized in that an inner spring (32) that exerts an urging force only during an angle is provided.

Further, in the floor hinge (10) according to the present invention, the rod member (18) is formed with a stopper portion (18a) for contacting and holding one end side of the inner spring (32). During the door opening operation from the closing angle to the predetermined door opening angle, the inner spring (32) is located between the stopper portion (18a) and the piston member (19), so that the oil chamber ( The inner spring (32) does not exert an urging force acting on the reciprocating movement of the piston member (19) in 12), and during the door opening operation from a predetermined door opening angle to a fully open angle of the door, the inner spring (32) is used. By being located between the stopper-shaped portion (11a) formed on the inner wall surface of the hinge case (11) and the piston member (19), the piston member (12) in the oil chamber (12) It is possible to exert an urging force acting on the reciprocating movement of 19).

Further, in the floor hinge (10) according to the present invention, the main spring (31) and the inner spring (32) are configured as coil springs, and the springs of the main spring (31) and the inner spring (32). It can be assumed that the winding direction of is arranged so as to be reverse winding.

According to the present invention, it is possible to provide a floor hinge with enhanced back-checking power without making a significant structural change to a conventional floor hinge and without significantly increasing the cost.

It is a figure for demonstrating the specific structure of the floor hinge which concerns on this Embodiment, the sectional drawing (a) in the figure shows the front view of the floor hinge, and the sectional drawing (b) is in the sectional drawing (a). The AA cross section is shown, and the fractional diagram (c) shows the BB cross section in the fractional diagram (a). It is a figure for demonstrating the operation of the floor hinge which concerns on this embodiment, and in particular, shows the floor hinge when the door is fully closed. It is a figure for demonstrating the operation of the floor hinge which concerns on this embodiment, and in particular, shows the floor hinge when the door is in the process of opening the door to a predetermined opening angle. It is a figure for demonstrating the operation of the floor hinge which concerns on this Embodiment, and in particular, shows the floor hinge when the door is fully open.

Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. It should be noted that the following embodiments do not limit the invention according to each claim, and not all combinations of features described in the embodiments are essential for the means for solving the invention. ..

First, a specific configuration of the floor hinge 10 according to the present embodiment will be described with reference to FIG. Here, FIG. 1 is a diagram for explaining a specific configuration of the floor hinge according to the present embodiment, and the sectional view (a) in the drawing shows a front view of the floor hinge, and the sectional view (b) is shown. Shows the AA cross section in the fractional diagram (a), and the fractional diagram (c) shows the BB cross section in the fractional diagram (a). In addition, in the fractionated figures (b) and (c) in FIG. 1, the part surrounded by the alternate long and short dash line on the right side of the paper shows the CC cross section in the segmented diagram (a) for convenience of explanation. There is. Further, FIG. 1 is a diagram showing a state of the floor hinge 10 when the door is fully closed.

The floor hinge 10 according to the present embodiment includes a hinge case 11 including an oil chamber 12 filled with hydraulic oil. The hinge case 11 is a member having an external shape having a substantially rectangular parallelepiped shape. The inside of the hinge case 11 is hollow as an oil chamber 12 filled with hydraulic oil, and an opening portion for opening the hollow is formed on the surface on the right side of the paper surface in FIG. This open portion is closed by the embedding member 13, and the oil chamber 12 is formed by closing the cavity.

On one end side of the hinge case 11 (on the left side of the paper in FIG. 1), a rotating shaft 14 which is connected to a door (not shown) and rotates as the door opens and closes is arranged in a rotatable state. A cam member 15 having a substantially heart shape, which is a non-circular shape, is fixedly installed at the center of the substantially shaft of the rotating shaft 14.

A cam follower 16 is arranged at a position on the left side of the paper surface in FIG. 1 with respect to the arrangement position of the cam member 15, and the cam follower 16 is fixedly installed with respect to the slide plate 17 in a state where the outer ring is rotatable. Since the cam follower 16 is arranged so as to be slidable with the outer peripheral surface of the cam member 15, when a door (not shown) opens and closes, the cam member 15 having a substantially heart shape rotates together with the rotating shaft 14, and the cam member The outer ring of the cam follower 16 rotates along the outer peripheral surface of the cam member 15 while always maintaining the state of sliding contact with the outer peripheral surface of the cam member 15. That is, due to the action of the cam member 15 having a substantially heart-shaped cam shape, the cam follower 16 and the slide plate 17 on which the cam follower 16 is fixedly installed move reciprocating in the hinge case 11 in the left-right direction of the paper surface in FIG. It is configured to do.

A rod member 18 is connected to the slide plate 17. The rod member 18 is arranged on the side of the slide plate 17 opposite to the side where the cam follower 16 is installed, and the cam member 15 is the cam follower 16 in the AA cross-sectional view shown in the segment (b) in FIG. It is arranged so as to be located between the rod member 18 and the rod member 18.

A piston member 19 is installed at an end of the rod member 18 opposite to the slide plate 17 connection side. The piston member 19 exerts a function of dividing the oil chamber 12 formed inside the hinge case 11 into a hydraulic oil chamber 12a which is a first oil chamber and a pressure oil chamber 12b which is a second oil chamber. It is a member. As described above, when the door (not shown) opens and closes, the slide plate 17 reciprocates in the hinge case 11 in the left-right direction of the paper surface in FIG. 1, so that the slide plate 17 and the rod member 18 attached to the slide plate 17 move back and forth. The piston member 19 also reciprocates in the oil chamber 12 in the left-right direction of the paper surface in FIG. When the door is fully closed as shown in FIG. 1, the piston member 19 is arranged at a position where the pressure oil chamber 12b, which is the second oil chamber, becomes the narrowest, and the operation of the first oil chamber. The oil chamber 12a will be arranged at the widest position. Further, as the door opening operation is performed from the fully closed state of the door (not shown) and the door opening angle is increased, the piston member 19 moves in the direction of expanding the oil pressure chamber 12b, which is the second oil chamber, and the second oil chamber is expanded. The hydraulic oil chamber 12a, which is the oil chamber of No. 1, is moved in the narrowing direction.

Further, a check valve 20 and a forced closing valve 21 are installed in the piston member 19 according to the present embodiment. The check valve 20 allows the hydraulic oil to flow from the hydraulic oil chamber 12a, which is the first oil chamber, to the pressure oil chamber 12b, which is the second oil chamber, while the reverse hydraulic oil flow. It is a valve body having a function of stopping. Therefore, when the door (not shown) is opened from the fully closed state shown in FIG. 1 and the piston member 19 moves in the oil chamber 12 from the right side to the left side of the paper surface in FIG. 1, the first oil chamber is used. By allowing the hydraulic oil to flow from the hydraulic oil chamber 12a to the pressure oil chamber 12b which is the second oil chamber, the piston member 19 is configured not to be hindered from moving in the oil chamber 12. Has been done. On the other hand, when the door (not shown) closes from the open state to the fully closed state shown in FIG. 1, the piston member 19 moves in the oil chamber 12 from the left side to the right side of the paper surface in FIG. Occasionally, the check valve 20 does not allow the flow of hydraulic oil.

The forced closing valve 21 is a valve body that operates when an abnormal hydraulic pressure is generated with respect to the hydraulic oil in the oil chamber 12, such as when the control mechanism unit described later does not function, and the floor hinge 10 according to the present embodiment. It is a member that exerts a function as a safety device in.

On the other hand, the plug member 13 and the hinge case 11 are provided with a mechanical member such as a flow path blocking member 13a, a hold open release valve 13b, and a latching valve 13c, and a pressure that is a second oil chamber via the hold open release valve 13b. In the 1st speed flow path 11b connecting the oil chamber 12b and the hydraulic oil chamber 12a which is the first oil chamber, and in the pressure oil chamber 12b and the first oil chamber which are the second oil chambers via the latching valve 13c. A unique flow path 11c or the like different from the first speed flow path 11b connecting to a certain hydraulic oil chamber 12a is formed. The control mechanism unit according to the present embodiment is formed by these mechanical members and the flow path, and is the hydraulic oil chamber 12a and the second oil chamber which are the first oil chambers accompanying the reciprocating movement of the piston member 19. By adjusting the amount of moving oil of the hydraulic oil between the pressure oil chambers 12b, the moving speed of the piston member 19 can be controlled, and thus the door opening speed or the door closing speed can be controlled. Regarding the details of the control mechanism unit according to the present embodiment, the object of the present invention is a back check function for delaying the door opening speed during the door opening operation from a predetermined door opening angle to the full opening angle of the door. Although detailed description is omitted, it is possible to apply a delayed action function, a latching action function, and any mechanism for realizing a door closing operation having a plurality of speeds when the door is closed.

Here, a stopper-shaped portion 11a is formed on the inner wall surface of the hinge case 11 forming the oil chamber 12 (see the fractional diagram (c) in FIG. 1). The stopper-shaped portion 11a is formed at a position slightly distant from the connection position between the slide plate 17 and the rod member 18 toward the piston member 19. A main spring 31 that constantly exerts an urging force in a constant direction on the piston member 19 is arranged between the stopper shape portion 11a and the piston member 19. That is, in the main spring 31 according to the present embodiment, the coil end on the left side of the paper surface in FIG. 1 is in contact with the stopper-shaped portion 11a, and the coil end on the right side in FIG. 1 is in contact with the piston member 19. Therefore, the piston member 19 is configured to be constantly pressed toward the right side of the paper surface in FIG. The direction of the urging force exerted by the main spring 31 is a direction in which a load is applied to the door opening operation when the door (not shown) is fully closed to open the door, and the door (not shown) is subjected to a load. It is a mechanism that constantly exerts a constant force.

Further, in the floor hinge 10 according to the present embodiment, a stopper pin 18a as a stopper portion is installed on the rod member 18, and the inner spring 32 is sandwiched between the stopper pin 18a and the piston member 19. Is installed. The inner spring 32 according to the present embodiment is a member arranged on the inner diameter side of the main spring 31. In the case of FIG. 1 in which the door is fully closed, the position of the stopper pin 18a fixedly installed on the rod member 18 is closer to the piston member 19 than the position of the stopper shape portion 11a formed on the inner wall surface of the hinge case 11. It is configured to be located. Therefore, when the door is fully closed, one end side of the inner spring 32 (left side of the paper surface in FIG. 1) is contact-held by the stopper pin 18a, and the other end side of the inner spring 32 (right side of the paper surface in FIG. 1) is a piston member. Since the contact is held by 19, the elastic force exerted by the inner spring 32 is exerted only on the piston member 19 alone, and the urging force thereof is not exerted on the outside of the piston member 19.

However, when the door (not shown) opens from a fully closed angle, the rod member 18 moves toward the left side of the paper surface in FIG. 1, and the position of the stopper pin 18a is a stopper formed on the inner wall surface of the hinge case 11. When the inner spring 32 is located closer to the anti-piston member 19 than the position of the shape portion 11a, one end side of the inner spring 32 (left side of the paper surface in FIG. 1) is contact-held by the stopper shape portion 11a, and the other end side of the inner spring 32 (in FIG. 1). Since the piston member 19 (on the right side of the paper surface) is held in contact with the piston member 19, the urging force of the inner spring 32 presses the piston member 19 toward the right side of the paper surface in FIG. 1 in the same manner as the main spring 31. That is, when a door (not shown) is opened from a fully closed state to a predetermined opening angle, the main spring 31 applies a load to the opening operation, and further, a fully opening angle is applied from the predetermined opening angle. When the door opening operation up to is performed, the main spring 31 and the inner spring 32 cooperate to exert a load on the door (not shown), so that the door is fully opened from the predetermined opening angle of the door (not shown). A floor hinge 10 capable of suitably exhibiting a back check function for delaying the door opening speed during the door opening operation up to this point has been realized.

That is, in the floor hinge 10 according to the present embodiment, the inner spring 32 is placed between the stopper pin 18a and the piston member 19 during the door opening operation from the fully closed angle to the predetermined opening angle of the door (not shown). By being positioned, the inner spring does not exert an urging force acting on the reciprocating movement of the piston member 19 in the oil chamber 12, and during the door opening operation from a predetermined opening angle to the fully opening angle of the door (not shown). The 32 is located between the stopper-shaped portion 11a formed on the inner wall surface of the hinge case 11 and the piston member 19, thereby exerting an urging force acting on the reciprocating movement of the piston member 19 in the oil chamber 12. Therefore, a back check function that delays the door opening speed during the door opening operation from a predetermined door opening angle to the fully open angle of the door (not shown) is exhibited.

In this embodiment, as shown in FIG. 1, the main spring 31 and the inner spring 32 are configured as coil springs, and the springs of the main spring 31 and the inner spring 32 are wound in reverse directions. Have been placed. By arranging the two coil springs so that the winding directions of the springs are opposite to each other, the two coil springs do not come into contact with each other when compressed, so that stable operation can be realized at all times. There is.

The specific configuration of the floor hinge 10 according to the present embodiment has been described above. Next, the operation of the floor hinge 10 according to the present embodiment will be described by adding FIGS. 2 to 4 to the reference drawings. Here, FIGS. 2 to 4 are views for explaining the operation of the floor hinge according to the present embodiment, and in particular, FIG. 2 shows the floor hinge when the door is fully closed, and FIG. 3 Shows the floor hinge when the door is in the middle of opening the door to a predetermined opening angle, and FIG. 4 shows the floor hinge when the door is sufficiently opened. In addition, in FIGS. 2 to 4, the fraction (a) in the figure shows the cross section AA in the segment (a) in FIG. 1, and the segment (b) is the segment (a) in FIG. BB cross section is shown in. Further, in the sectional views (a) and (b) in FIGS. 2 to 4, the portion surrounded by the alternate long and short dash line on the right side of the paper is C in the sectional view (a) in FIG. 1 for convenience of explanation. -C cross section is shown.

First, when the door (not shown) is in the fully closed state, the floor hinge 10 according to the present embodiment is in the state shown in FIG. That is, the recess of the cam member 15 having a substantially heart shape is fitted into the cam follower 16, and the piston member 19 is arranged at a position where the oil pressure chamber 12b, which is the second oil chamber, is narrowest. , The hydraulic oil chamber 12a, which is the first oil chamber, is arranged at the widest position. At this time, one end side of the inner spring 32 (the left side of the paper surface in FIG. 2) is contact-held by the stopper pin 18a, and the other end side of the inner spring 32 (the right side of the paper surface in FIG. 2) is contact-held by the piston member 19. The elastic force exerted by the inner spring 32 is applied only to the piston member 19 alone, and the urging force thereof is not applied to the outside of the piston member 19. Therefore, when the door is opened from the fully closed state of the door shown in FIG. 2 to a predetermined opening angle, the urging force exerted by the main spring 31 arranged between the stopper shape portion 11a and the piston member 19 is exerted. Only is applied to the piston member 19, and a constant force is always applied to the door opening operation.

When the door opening operation (not shown) is continued from the state of FIG. 2, as shown in FIG. 3, the rod member 18 and the piston member 19 and the like are moved to the left side of the paper surface in FIG. 3 due to the shape action of the cam member 15 having a substantially heart shape. Move to. At this time, the check valve 20 allows the hydraulic oil to flow from the hydraulic oil chamber 12a, which is the first oil chamber, to the pressure oil chamber 12b, which is the second oil chamber, so that the piston member 19 can be used. It is arranged at a position where the region of the pressure oil chamber 12b, which is the second oil chamber, is widened, and is arranged at a position where the region of the hydraulic oil chamber 12a, which is the first oil chamber, is narrowed. Further, when the floor hinge 10 according to the present embodiment shifts from the state of FIG. 2 to the state of FIG. 3, the rod member 18 moves toward the left side of the paper surface in FIG. 3, and the position of the stopper pin 18a is the hinge case. When located closer to the anti-piston member 19 than the position of the stopper-shaped portion 11a formed on the inner wall surface of 11, one end side of the inner spring 32 (left side of the paper surface in FIG. 3) is contact-held by the stopper-shaped portion 11a, and the inner spring Since the other end side of the 32 (the right side of the paper surface in FIG. 3) is contacted and held by the piston member 19, the urging force of the inner spring 32 causes the piston member 19 to move to the right side of the paper surface in FIG. 3 in the same manner as the main spring 31. It will be pressed toward. That is, when the door (not shown) is opened from the fully closed state to a predetermined opening angle (that is, from the state of FIG. 2 to the state slightly before of FIG. 3), the door is opened. Only the main spring 31 exerts a load on the operation. Subsequently, when the door opening operation is performed from the predetermined door opening angle to the fully open angle (that is, from the state slightly before FIG. 3 to the state of FIG. 3 and further to the state of FIG. 4), The main spring 31 and the inner spring 32 work together to exert a load on a door (not shown). In the state shown in FIG. 4, the rod member 18, the piston member 19, and the like move most to the left side of the paper surface in FIG. 4 due to the shape action of the cam member 15 having a substantially heart shape, and the piston member 19 is in the second oil chamber. It is arranged at a position that maximizes the region of a certain pressure oil chamber 12b, and is arranged at a position that minimizes the region of the hydraulic oil chamber 12a, which is the first oil chamber.

As described above, in the floor hinge 10 according to the present embodiment, the door is being opened from the fully closed angle to the predetermined opening angle of the door (not shown), that is, slightly before FIG. 3 from the state of FIG. Until the state is reached, the inner spring 32 is located between the stopper pin 18a and the piston member 19 so as not to exert an urging force acting on the reciprocating movement of the piston member 19 in the oil chamber 12. During the door opening operation from a predetermined opening angle to the fully opened angle of the door (not shown), that is, from the state slightly before FIG. 3 to the state of FIG. 3 and further to the state of FIG. 4, the inner The spring 32 is located between the stopper-shaped portion 11a formed on the inner wall surface of the hinge case 11 and the piston member 19, so that the spring 32 exerts an urging force acting on the reciprocating movement of the piston member 19 in the oil chamber 12. Therefore, a suitable back check function for delaying the door opening speed during the door opening operation from a predetermined door opening angle to the fully open angle of the door (not shown) is exhibited.

In the floor hinge 10 according to the present embodiment, the back check function described with reference to FIGS. 1 to 4 is realized by adding the inner spring 32. Therefore, according to the present embodiment, it is possible to provide a floor hinge having an enhanced back-checking force without increasing the cost as compared with the floor hinge according to the prior art.

Although the preferred embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the scope described in the above embodiments. Various changes or improvements can be made to the above embodiments.

For example, in the above-described embodiment, the stopper portion that contacts and holds one end side of the inner spring 32 is configured as the stopper pin 18a that is inserted and installed in the rod member 18, but the stopper portion according to the present invention is the stopper pin. Various modified forms can be adopted as long as the same effects as those of 18a can be exhibited. For example, by changing the outer shape of the rod member, it is possible to adopt a rod member having a shape in which the rod member 18 and the stopper pin 18a in the above-described embodiment are integrated.

It is clear from the description of the claims that such modified or improved forms may also be included in the technical scope of the present invention.

10 Floor hinge, 11 Hinge case, 11a Stopper shape part, 11b 1st speed flow path, 11c flow path, 12 oil chamber, 12a hydraulic oil chamber, 12b pressure oil chamber, 13 embedding member, 13a flow path blocking member, 13b hold Open release valve, 13c latching valve, 14 rotating shaft, 15 cam member, 16 cam follower, 17 slide plate, 18 rod member, 18a stopper pin, 19 piston member, 20 check valve, 21 forced closing valve, 31 main spring, 32 Inner spring.

Claims (3)

A hinge case with an oil chamber filled with hydraulic oil and
A rotating shaft that is arranged on one end side of the hinge case and is connected to the door and rotates as the door opens and closes.
A non-circular cam member fixedly installed on the rotating shaft,
A slide plate that reciprocates in the hinge case with the rotational movement of the cam member by providing a cam follower that is arranged so as to be slidable with the outer peripheral surface of the cam member.
The rod member connected to the slide plate and
It is installed at the end of the rod member on the side opposite to the slide plate connection side, and the oil chamber is divided into a first oil chamber and a second oil chamber and is installed so as to be reciprocally movable in the oil chamber. Piston member and
By arranging between the stopper-shaped portion formed on the inner wall surface of the hinge case forming the oil chamber and the piston member, a main spring that constantly exerts an urging force in a certain direction on the piston member. ,
The moving speed of the piston member is controlled by adjusting the amount of moving oil of the hydraulic oil between the first oil chamber and the second oil chamber accompanying the reciprocating movement of the piston member, thereby opening the door. A control mechanism that controls the door speed or closing speed,
It is a floor hinge equipped with
Between a certain or more door opening angle on the inner diameter side of the main spring so as to exert a back check function that delays the door opening speed during the door opening operation from a predetermined door opening angle to the fully open angle of the door. A floor hinge that features an inner spring that only exerts urging force. In the floor hinge according to claim 1,
The rod member is formed with a stopper portion that contacts and holds one end side of the inner spring.
During the door opening operation from the fully closed angle of the door to the predetermined opening angle, the inner spring is located between the stopper portion and the piston member, so that the piston member in the oil chamber It does not exert the urging force that acts on the reciprocating motion,
During the door opening operation from the predetermined door opening angle to the fully open angle of the door, the inner spring is positioned between the stopper-shaped portion formed on the inner wall surface of the hinge case and the piston member. , A floor hinge characterized by exerting an urging force acting on the reciprocating motion of the piston member in the oil chamber. In the floor hinge according to claim 1 or 2.
The main spring and the inner spring are configured as coil springs.
A floor hinge characterized in that the main spring and the inner spring are arranged so that the winding directions of the springs are opposite to each other.

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