JPH0618010U - Lever and door shaft mounting structure - Google Patents

Abstract

(57) [Summary] [Purpose] The structure is such that the claw that locks the lever does not directly contact the case. [Structure] A pawl formed at the tip of a locking rod for holding the lever is held by a flange extended to one end of the door shaft to hold the lever, and an inner peripheral portion of an opening formed in the case. Means that the contact portion of the locking rod and the outer peripheral portion of the contact rod contact and slide between the locking rods, and the claw locking the lever does not slide directly. The lever operates smoothly.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a switching door used for switching an air passage of an automobile air conditioner, and a mounting structure of a lever for driving the switching door.

[0002]

[Prior art]

 A conventional switching valve (switching door) used for switching the air passage of an automobile air conditioner is disclosed in, for example, Japanese Utility Model Laid-Open No. 63-39128, in which one end of the valve plate shaft is connected to the valve plate plate portion. As the structure is such that it projects outwards and engages with the hole of the case 1, a hole is provided at the other end of the shaft, and the shaft of the operating lever snaps into the wall of the case. A solid part having an outer diameter that fits the inner diameter of the hole in the wall is arranged between each of the divided claws, and this reduces the number of parts and reduces the number of parts. The purpose is to reduce the gap, and the snap fit portion of the operating lever has rigidity strength against a lateral load.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned reference, since the claw for snap-fitting the shaft of the operation lever to the wall of the case comes into direct contact with the inside of the case and slides, the catch of the claw causes the operation lever to move. In addition to the problem that smooth driving is hindered, wear of the pawl and wear of the abutting part of the pawl cause rattling of the lever and shaft, and problems such as the lever falling.

Therefore, the present invention provides a mounting structure for a lever and a door shaft in which a claw for locking the lever does not directly contact the case.

[0005]

[Means for Solving the Problems]

 Accordingly, the present invention provides a mounting structure of a door shaft fixed to a door for controlling the flow of air in a case, and a lever arranged outside the case for urging a rotational force to the door shaft. A door shaft having a flange extending in the radial direction at one end, a plurality of locking holes formed through the flange, and an insertion hole having a notch inside the door shaft. A transmission rod that is inserted into the insertion hole and transmits rotational force to the door shaft; an abutting portion that abuts an inner circumference of an opening opening in the case; and a transmission rod formed at a tip of the abutting portion. A plurality of locking rods that are formed around and have a claw that is inserted into the locking hole and meshes with the opposite surface of the flange, and is formed between each of the plurality of locking rods, and opens in the case. Inner circumference of the opening A lever abuts the abutment rod is formed in the mounted through an opening of the case.

[0006]

[Action]

 Therefore, in this invention, the pawl formed at the tip of the locking rod for holding the lever is locked to the flange extended to the one end of the door shaft to hold the lever, and the opening of the opening formed in the case is locked. The contact portion of the locking rod and the outer peripheral portion of the contact rod formed between the locking rods come into contact with and slide on the inner peripheral portion, so that the pawl for locking the lever is directly slid. Since the lever does not move, the operation of the lever becomes smooth, and the above problem can be achieved.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1 and FIG. 2, for example, an air mix door 2 arranged in an air conditioning duct (case) 1 of an automobile air conditioner is for opening and closing an upstream side of a heater core (not shown), and is fixed to a door shaft 3. The lever shaft 3 rotates about the fulcrum.

One end of the door shaft 3 is rotatably held by a holding portion 4 formed in the case 1, and the other end is connected and held by an operating lever 6 through an opening 5 opened in the case 1. It is rotated by the operation of the operation lever 6. The door shaft 3 and the operating lever 6 are connected by the connecting portion 7a of the door shaft 3 and the connecting portion 7b of the operating lever 6 engaging with each other. The connecting portion 7a of the door shaft 3 and the operating lever 6 are connected to each other. The parts 7b are connected to form the connecting part 7.

As shown in FIG. 3, the connecting portion 7 a of the door shaft 3 has a flange 8 extending in the radial direction at its tip, and a plurality of locking holes 9 formed through the flange 8 (this embodiment). In the example, there are four positions (upper, lower, left and right) and insertion holes 10 formed in the axial direction of the door shaft 3. A notch 11 is formed in the insertion hole 10 so that the direction in which a transmission rod 12 described below is inserted is fixed.

Further, as shown in FIG. 4, the connecting portion 7b of the operating lever 6 is inserted into the insertion hole 10 at the center and has a cutout portion 15 corresponding to the cutout portion 11, and has a cutout portion 15. A transmission rod 12 for transmitting the rotation of 6 to the door shaft 3 is formed, and around this transmission rod 12, a locking rod 13 formed at a position corresponding to the locking hole 9 is formed. . The locking rod 13 is inserted into the locking hole 9, and then has a claw portion 13a that meshes with the flange and an arc-shaped outer circumference so as to come into contact with the inner peripheral surface of the opening 5 and slide. And an abutting portion 13b having

Between the locking rods 13, a plurality of contact rods 14 each having a length equal to or less than the length of the opening 5 and having an arc-shaped outer circumference that contacts the inner peripheral surface of the opening 5 are formed. The contact portion 13b of the locking rod 13 and the contact rod 14 make contact with the inner peripheral surface of the opening 5 to slide. Since the contact rod 14 only has to serve to fill the space between the locking rods 13 within a predetermined range, it is necessary that the outer peripheral surface of the contact rod 14 has an arcuate shape that contacts the inner peripheral surface of the opening 5. Other than that, the size is not limited.

In the operation lever 6 and the door shaft 3 having the above-described structures, as shown in FIG. 5, the transmission rod 12 of the operation lever 6 is inserted into the insertion hole 10 and the locking rod 13 is locked in the locking hole 9. Then, the claw portion 13a is engaged with the opposite surface of the flange 8 and locked, and the contact portion 13b of the locking rod 13 and the contact rod 14 contact the inner peripheral surface of the opening 5. The operation lever 6 and the door shaft 3 are fixed to each other.

As a result, when the operation lever 6 is driven, this driving force is transmitted to the door shaft 3 via the transmission rod 12, and the locking rod 13 is also driven in addition to the transmission rod 12. The force can be transmitted, and thus the load on the transmission rod 12 can be reduced.

Further, since the claw portion 13a of the locking rod 13 only engages with the flange 8 to hold the operation lever 6, it does not slide on the inner wall of the case 1 and the inner wall of the case 1 does not slide. Since the sliding part with and is performed on the outer surface of the flange, the conventional point sliding (in the case of claws) is changed to surface sliding (the outer surface of the flange), and the inner wall of the case 1 may be damaged. Therefore, the operation lever 6 can be smoothly rotated.

[0015]

[Effect of device]

 As described above, according to the present invention, a flange is formed at the tip of the door shaft, and the claw portion of the locking rod that holds the operation lever meshes with the flange formed on the door shaft to form the operation lever. In order to hold the flange, the flange does not slide against the inner wall of the case, and the claw itself does not slide. You will not get caught up in time. Also, by eliminating this catch, rattling of the operating lever and shaft and tilting of the lever can be prevented, and workability can be improved due to the ease of mounting. Further, in this mounting structure, since the door and the door shaft can be made of resin because screws and the like are not used, the weight can be reduced.

[Brief description of drawings]

FIG. 1 is an overall explanatory view of a door according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a door according to an embodiment of the present invention.

3A is a partially cutaway sectional view of a door shaft according to an embodiment of the present invention, and FIG. 3B is a front view.

4A is a partially cutaway sectional view of an operation lever according to an embodiment of the present invention, and FIG. 4B is a front view.

FIG. 5 is a partially cutaway sectional view of a connecting portion between a door shaft and an operating lever.

[Explanation of symbols]

 1 Case (air-conditioning duct) 2 Door 3 Door shaft 5 Opening 6 Operation lever 7 Connecting part 8 Flange 9 Locking hole 10 Insertion hole 12 Transmission rod 13 Locking rod 14 Contact rod

Claims (1)

[Scope of utility model registration request] 1. A mounting structure of a door shaft fixed to a door for controlling an air flow in a case, and a lever arranged outside the case for urging a rotational force to the door shaft, wherein one end is provided. A door shaft having a flange extending in the radial direction of the portion, a plurality of locking holes formed through the flange, and an insertion hole having a notch inside the door shaft, the insertion hole A transmission rod that is inserted into the door shaft to transmit rotational force to the door shaft, an abutment portion that abuts an inner circumference of an opening portion that opens in the case, and a tip end of the abutment portion that is formed around the transmission rod. A plurality of locking rods each having a pawl inserted into the locking hole and engaging with the opposite surface of the flange, and an opening formed in each of the plurality of locking rods and opening in the case. Abut on the circumference The head and are formed lever attachment structure of the lever and the door shaft, characterized in that mounted over the opening of the case.