CN219733142U

CN219733142U - Connecting device for door closer and door closer

Info

Publication number: CN219733142U
Application number: CN202321174655.1U
Authority: CN
Inventors: 蔡国赐; 蔡海勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-05-16
Filing date: 2023-05-16
Publication date: 2023-09-22
Anticipated expiration: 2033-05-16

Abstract

The utility model discloses a connecting device for a door closer and the door closer, wherein the connecting device comprises a first swing arm, a swing seat, a second swing arm and a locking mechanism; the first swing arm is fixedly connected with the connecting seat; the swinging seat can be arranged on the connecting seat in a swinging way, and a locking C-shaped buckle is arranged on the swinging seat; the second swing arm is pivotally connected with the connecting seat to form a first positioning point, a locking column is arranged on the second swing arm, the locking column slides into the locking C-shaped buckle to form a second positioning point, and the locking column pushes the swing seat to move in the process of sliding into the locking C-shaped buckle; the locking mechanism is used for positioning the connecting seat and the swinging seat to form a third positioning point after the locking column slides into the locking C-shaped buckle, and the locking mechanism is used for releasing the relative fixation of the connecting seat and the swinging seat after the locking column slides out of the locking C-shaped buckle. The utility model forms a stable triangle structure through three positioning points, thereby realizing that the door closer stably maintains the normally open state of the door or the window, and having better reliability.

Description

Connecting device for door closer and door closer

Technical Field

The utility model relates to the technical field of door closers, in particular to a connecting device for a door closer and the door closer.

Background

The door closer is used for being connected with a door or a window, and is released after being compressed after being opened, so that the door or the window is automatically closed, and the door or the window is timely closed after being opened. I.e. the most important use of door closers is to cause the door or window to close itself, limiting the spread of the fire.

Specifically, when the door or window is opened, the door or window drives the connecting rod to act, the transmission gear is driven to rotate, the rack plunger is driven to move, the tact spring is compressed in the moving process of the rack plunger, hydraulic oil in the right cavity of the oil cylinder is also compressed, the check valve ball body on the left side of the rack plunger is opened under the action of oil pressure, and hydraulic oil in the right cavity flows into the left cavity through the check valve. After the door or window is opened, the light-touch spring is compressed in the opening process, and releases the rack plunger to move in the opposite direction, so that the transmission gear and the connecting rod are driven to rotate, and the door or window is closed. In the related art, door closers are normally closed and cannot be used for door opening or window positioning.

Publication number CN102995996a discloses an automatic fire door closer with stop, which is characterized in that an elastic steel ball is arranged at the front end of a door closer main body, and the steel ball is clamped into a groove of a positioning bottom plate under the action of a spring, so that the door opening or window positioning function is achieved. The automatic fire door closer with the stop position is poor in stability, namely poor in reliability, and meanwhile, more in components and more in structure.

Disclosure of Invention

The present utility model aims to solve at least to some extent one of the technical problems in the above-described technology. Therefore, an object of the present utility model is to provide a connecting device for a door closer, which forms a stable triangle structure through three positioning points, so as to realize that the door closer stably maintains a door or window normally open state, i.e. the door closer can stably maintain the door or window normally open state, with good reliability.

A second object of the utility model is to propose a door closer comprising a connecting device.

To achieve the above object, an embodiment of a first aspect of the present utility model provides a connection device for a door closer, including:

the first swing arm is fixedly connected with the connecting seat;

the swinging seat can be arranged on the connecting seat in a swinging way, and a locking C-shaped buckle is arranged on the swinging seat;

the second swing arm is pivotally connected with the connecting seat to form a first positioning point, a locking column is arranged on the second swing arm, the locking column slides into the locking C-shaped buckle to form a second positioning point, and the locking column pushes the swing seat to move in the process of sliding into the locking C-shaped buckle;

the locking mechanism is used for positioning the connecting seat and the swinging seat after the locking column slides into the locking C-shaped buckle to enable the connecting seat and the swinging seat to be relatively fixed to form a third positioning point, and the locking mechanism is used for releasing the relative fixation of the connecting seat and the swinging seat after the locking column slides out of the locking C-shaped buckle.

According to the connecting device for the door closer, when the connecting device is used, the first swing arm is connected with a door or a window, and the second swing arm is connected with the door closer main body; the second swing arm and the connecting seat are in pivot connection to form a first positioning point, when the first swing arm rotates along with the door or the window, the locking column of the second swing arm pushes the swing seat to swing and slide into a second positioning point in the locking C-shaped buckle, and the locking mechanism positions the connecting seat and the swing seat to be relatively fixed after the locking column slides into the locking C-shaped buckle to form a third positioning point. Therefore, the door closer can stably maintain the normally open state of the door or the window through the stable triangular structure formed by the three positioning points, and the reliability is good.

In addition, the connecting device for a door closer according to the above embodiment of the present utility model may further have the following additional technical features:

optionally, the locking mechanism comprises an operation assembly, a pin hole and a pin shaft; one of the pin hole and the pin shaft is arranged on the swinging seat, and the other one of the pin hole and the pin shaft is arranged on the connecting seat; the operation assembly is connected with the pin shaft, the operation assembly drives the pin shaft to be inserted into the pin hole after the locking column slides into the locking C-shaped buckle so as to position the connecting seat and the swinging seat to be relatively fixed, and the operation assembly drives the pin shaft to slide out of the pin hole after the locking column slides out of the locking C-shaped buckle.

Specifically, the operation assembly comprises an electromagnet, a lever and a signal switch; the electromagnet is arranged on the connecting seat and is connected with the signal switch; the lever can be arranged on the connecting seat in a swinging way, one end of the lever can be attracted by the electromagnetic iron, and the other end of the lever is connected with the pin shaft; the signal switch triggers a signal to the electromagnet after the locking column slides into the locking C-shaped buckle, and the electromagnet drives the lever to swing so as to drive the pin shaft to be inserted into the pin hole.

Further, a light touch spring is arranged between the lever and the connecting seat; the signal switch triggers a signal to cause the electromagnet to lose attraction force when the locking column slides out of the locking C-shaped buckle, and the pin shaft can slide out of the pin hole.

Further, the middle part of the swinging seat is hinged with the connecting seat, one side of the hinged position is provided with the locking C-shaped buckle, and the other side of the hinged position is provided with the pin hole.

Further, a reset torsion spring is arranged between the swinging seat and the connecting seat, one end of the reset torsion spring is propped against the swinging seat, and the other end of the reset torsion spring is propped against the connecting seat.

Further, the sliding-in sliding-out side of the locking column at the opening end of the locking C-shaped buckle is provided with an arc guide surface; the locking C-shaped buckle opening end is provided with a locking column which slides in and out from the side to protrude out of the other side.

Specifically, the operation assembly comprises an adjusting screw and a force application spring, the connecting seat is provided with a mounting through hole, and the pin shaft is arranged in the mounting through hole and partially protrudes out of the mounting through hole; the adjusting screw is in threaded connection with the mounting through hole; the force application spring is arranged in the installation through hole, one end of the force application spring is abutted against the adjusting screw, and the other end of the force application spring is abutted against the pin shaft.

Further, the pin hole is arranged on the swing seat, and an electromagnet is arranged on one side of the swing seat corresponding to the pin hole so as to magnetically attract the pin shaft.

Optionally, the first swing arm is fixedly connected with the connecting seat in a split or integrated manner.

To achieve the above object, a second aspect of the present utility model provides a door closer, including a connecting device, a first swing arm of the connecting device is used for connecting a door or a window, and a second swing arm of the connecting device is connected to a main body of the door closer.

According to the door closer disclosed by the embodiment of the utility model, when the door closer is used, the first swing arm is connected with a door or a window, and the second swing arm is connected with the door closer main body; the second swing arm and the connecting seat are in pivot connection to form a first positioning point, when the first swing arm rotates along with the door or the window, the locking column of the second swing arm pushes the swing seat to swing and slide into a second positioning point in the locking C-shaped buckle, and the locking mechanism positions the connecting seat and the swing seat to be relatively fixed after the locking column slides into the locking C-shaped buckle to form a third positioning point. Therefore, the door closer can stably maintain the normally open state of the door or the window through the stable triangular structure formed by the three positioning points, and the reliability is good.

Drawings

FIG. 1 is a perspective view of a front perspective assembly (locking posts not snapped into locking C-shaped buttons) according to an embodiment of the present utility model;

FIG. 2 is a perspective view of the back perspective assembly of the present utility model (the locking post is not snapped into the locking C-shaped clasp);

FIG. 3 is a perspective view of a front perspective assembly (locking post snap-in locking C-clip) according to an embodiment of the present utility model;

FIG. 4 is a perspective view of the back perspective assembly (locking post snap-in locking C-clip) according to an embodiment of the present utility model;

FIG. 5 is a top view of an embodiment of the present utility model;

FIG. 6 is a cross-sectional view taken in the direction of FIG. 5 A-A;

FIG. 7 is a side view of an embodiment of the present utility model;

FIG. 8 is a schematic diagram illustrating a first swing arm and a second swing arm rotating to a minimum angle according to an embodiment of the present utility model;

fig. 9 is another schematic structural diagram of an embodiment of the present utility model.

Description of the reference numerals

The device comprises a first swing arm 1, a connecting seat 2, a mounting through hole 21, a swing seat 3, a locking C-shaped buckle 31, a second swing arm 4, a locking column 41, a locking mechanism 5, an operation assembly 51, an electromagnet 511, a lever 512, a signal switch 513, a tact spring 514, an adjusting screw 515, a force application spring 516, a pin hole 52, a pin shaft 53, a screw 531, a pin shaft main body 532 and a reset torsion spring 6.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In order that the above-described aspects may be better understood, exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

As shown in fig. 1 to 9, a connecting device for a door closer according to an embodiment of the present utility model includes a first swing arm 1, a connecting base 2, a swing base 3, a second swing arm 4, and a locking mechanism 5.

The first swing arm 1 is fixedly connected with the connecting seat 2. Optionally, the first swing arm 1 may be fixedly connected to the connection base 2 in a split manner, specifically, a threaded hole is formed in the connection base 2, an installation latch is formed at the periphery of the threaded hole, correspondingly, the first swing arm 1 is provided with an installation hole, an installation latch is also formed at the periphery of the installation hole, and the screw rod passes through the installation hole of the first swing arm 1 to be in threaded connection with the threaded hole of the connection base 2, and meanwhile, the two installation latches are mutually meshed, so that the first swing arm 1 is fixedly connected to the connection base 2. The first swing arm 1 can be integrally and fixedly connected with the connecting seat 2, namely, the connecting seat 2 is directly formed by extending at the end part of the first swing arm 1.

The swinging seat 3 can swing and install on the connecting seat 2, is equipped with locking C knot 31 on the swinging seat 3. Specifically, a rotating shaft can be arranged on the swinging seat 3, a rotating shaft hole is arranged on the connecting seat 2, and the swinging seat 3 can be arranged on the connecting seat 2 in a swinging way through the cooperation of the rotating shaft and the rotating shaft hole, namely, the swinging seat 3 is hinged with the connecting seat 2.

The second swing arm 4 is pivotally connected with the connecting seat 2 to form a first positioning point, the second swing arm 4 is provided with a locking column 41, the locking column 41 slides into the locking C-shaped buckle 31 to form a second positioning point, and the locking column 41 pushes the swing seat 3 to move in the process of sliding into the locking C-shaped buckle 31. Specifically, the slide-in and slide-out sides of the locking columns 41 at the open ends of the locking C-shaped buckles 31 are provided with arc-shaped guide surfaces so that the locking columns 41 slide in and out without jamming. The locking column 41 at the opening end of the locking C-shaped buckle 31 slides into the sliding side to protrude out of the other side, so that the locking column 41 cannot easily slide out after sliding into the locking C-shaped buckle 31, and further positioning function is achieved.

After the locking column 41 slides into the locking C-shaped buckle 31, the locking mechanism 5 positions the connecting seat 2 and the swinging seat 3 to be relatively fixed to form a third positioning point, and after the locking column 41 slides out of the locking C-shaped buckle 31, the locking mechanism 5 releases the relative fixation of the connecting seat 2 and the swinging seat 3.

Optionally, the locking mechanism 5 includes an operating assembly 51, a pin hole 52, and a pin 53; one of the pin hole 52 and the pin shaft 53 is provided on the swing seat 3, and the other of the pin hole 52 and the pin shaft 53 is provided on the connection seat 2. In this embodiment, the pin 53 is disposed on the swing seat 3, and the pin hole 52 is disposed on the connection seat 2. The operation assembly 51 is connected with the pin shaft 53, the operation assembly 51 drives the pin shaft 53 to be inserted into the pin hole 52 after the locking column 41 slides into the locking C-shaped buckle 31 so as to position the connecting seat 2 and the swinging seat 3 to be relatively fixed, and the operation assembly 51 drives the pin shaft 53 to slide out of the pin hole 52 after the locking column 41 slides out of the locking C-shaped buckle 31.

Specifically, the pin 53 includes a screw 531 and a pin body 532 threadedly connected to the screw 531, so that the length of the pin 53 can be adjusted due to the threaded connection of the screw 531 and the pin body 532.

In some examples, as shown in fig. 5 and 6, the operating assembly 51 includes an electromagnet 511, a lever 512, and a signal switch 513; the electromagnet 511 is arranged on the connecting seat 2 and is connected with the signal switch 513; the lever 512 is arranged on the connecting seat 2 in a swinging way, one end of the lever 512 can be magnetically attracted by the electromagnet 511, and the other end of the lever is connected with the pin shaft 53; the signal switch 513 triggers a signal to the electromagnet 511 after the locking post 41 slides into the locking C-shaped buckle 31, specifically, when the locking post 41 slides into the locking C-shaped buckle 31, the signal switch 513 is triggered simultaneously, the electromagnet 511 drives the lever 512 to swing, and the pin shaft 53 is driven to be inserted into the pin hole 52, so that the connecting seat 2 and the swinging seat 3 are positioned to be relatively fixed.

A light contact spring 514 is arranged between the lever 512 and the connecting seat 2, and the light contact spring 514 enables the lever 512 to keep light contact with the connecting seat 2, so that the situation that the gap between the lever 512 and the connecting seat 2 is too large to be closed after the electromagnet 511 is electrified is prevented. The signal switch 513 triggers the signal actuation magnet 511 to lose the attraction force when the locking post slides out of the locking C-shaped buckle, and the pin shaft 53 can slide out of the pin hole 52, namely, the door closer main body acts on the second swing arm 4 to drive the pin shaft 53 to slide out of the pin hole 52. Of course, when the door opening electromagnet 511 is electrically attracted, if the force of the external force forces the door to be closed to be more than the positioning force of the pin 53, the lever 512 is driven to swing, and the pin 53 is driven to be separated from the pin hole 52.

Further, the middle part of the swinging seat 3 is hinged with the connecting seat 2, one side of the hinged position forms a locking C-shaped buckle 31, and the other side of the hinged position forms a pin hole 52. A reset torsion spring 6 is arranged between the swinging seat 3 and the connecting seat 2, one end of the reset torsion spring 6 is propped against the swinging seat 3, and the other end of the reset torsion spring 6 is propped against the connecting seat 2.

As shown in fig. 3 and 8, another signal switch 513 may be disposed on the connection shaft between the second swing arm 4 and the connection base 2, and in the door or window closed state, the second swing arm 4 triggers the switching signal of the other signal switch 513.

In other examples, as shown in fig. 9, the operation assembly 51 includes an adjusting screw 515 and a force spring 516, the connection base 2 is provided with a mounting through hole 21, and the pin 53 is disposed in the mounting through hole 21 and partially protrudes from the mounting through hole 21; the adjusting screw 515 is in threaded connection with the mounting through hole 21; the force spring 516 is placed in the mounting through hole 21, one end of the force spring 516 abuts against the adjusting screw 515, and the other end abuts against the pin 53.

In order to further improve the positioning reliability, the pin hole 52 is provided on the swing seat 3, and an electromagnet 511 is provided on a side of the swing seat 3 corresponding to the pin hole 52 to magnetically attract the pin 52.

When the connecting device is used, the first swing arm 1 is connected with a door or a window, the second swing arm 4 is connected with a door closer main body, and the door closer main body can be of the prior art and can be of various structures, and the specific structure is not repeated here; the second swing arm 4 is pivotally connected with the connecting seat 2 to form a first positioning point, when the first swing arm 1 rotates along with the door or the window, the locking column 41 of the second swing arm 4 pushes the swing seat 3 to swing and slide into a second positioning point in the locking C-shaped buckle 31, and the locking mechanism 5 positions the connecting seat 2 and the swing seat 3 to be relatively fixed after the locking column 41 slides into the locking C-shaped buckle 31 to form a third positioning point. Therefore, the door closer can stably maintain the normally open state of the door or the window through the stable triangular structure formed by the three positioning points, and the reliability is good.

An embodiment of the second aspect of the utility model proposes a door closer comprising connecting means, a first swing arm 1 of which is used to connect a door or window, and a second swing arm 4 of which is connected to a door closer body. The connecting device comprises a first swing arm 1, a connecting seat 2, a swing seat 3, a second swing arm 4 and a locking mechanism 5.

In some examples, the operating assembly 51 includes an electromagnet 511, a lever 512, and a signal switch 513; the electromagnet 511 is arranged on the connecting seat 2 and is connected with the signal switch 513; the lever 512 is arranged on the connecting seat 2 in a swinging way, one end of the lever 512 can be magnetically attracted by the electromagnet 511, and the other end of the lever is connected with the pin shaft 53; the signal switch 513 triggers a signal to the electromagnet 511 after the locking post 41 slides into the locking C-shaped buckle 31, specifically, when the locking post 41 slides into the locking C-shaped buckle 31, the signal switch 513 is triggered simultaneously, the electromagnet 511 drives the lever 512 to swing, and the pin shaft 53 is driven to be inserted into the pin hole 52, so that the connecting seat 2 and the swinging seat 3 are positioned to be relatively fixed.

A tact spring 514 is arranged between the lever 512 and the connecting seat 2; the signal switch 513 triggers a signal to the electromagnet 511 after the locking post slides out of the locking C-shaped buckle to close the electromagnet 511, and the lever 512 swings under the action of the tact spring 514 to drive the pin shaft 53 to slide out of the pin hole 52.

In other examples, the operating assembly 51 includes an adjusting screw 515 and a force spring 516, the connection base 2 is provided with a mounting through hole 21, and the pin 53 is disposed in the mounting through hole 21 and partially protrudes from the mounting through hole 21; the adjusting screw 515 is in threaded connection with the mounting through hole 21; the force spring 516 is placed in the mounting through hole 21, one end of the force spring 516 abuts against the adjusting screw 515, and the other end abuts against the pin 53.

When the door closer disclosed by the embodiment of the utility model is used, the first swing arm 1 is connected with a door or a window, the second swing arm 4 is connected with a door closer main body, and the door closer main body can be of the prior art and can be of various structures, and the specific structure of the door closer is not repeated here; the second swing arm 4 is pivotally connected with the connecting seat 2 to form a first positioning point, when the first swing arm 1 rotates along with the door or the window, the locking column 41 of the second swing arm 4 pushes the swing seat 3 to swing and slide into a second positioning point in the locking C-shaped buckle 31, and the locking mechanism 5 positions the connecting seat 2 and the swing seat 3 to be relatively fixed after the locking column 41 slides into the locking C-shaped buckle 31 to form a third positioning point. Therefore, the door closer can stably maintain the normally open state of the door or the window through the stable triangular structure formed by the three positioning points, and the reliability is good.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms should not be understood as necessarily being directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims

1. A connection device for a door closer, comprising:

the first swing arm is fixedly connected with the connecting seat;

2. A connection for a door closer according to claim 1, wherein the locking mechanism includes an operating assembly, a pin bore, and a pin shaft; one of the pin hole and the pin shaft is arranged on the swinging seat, and the other one of the pin hole and the pin shaft is arranged on the connecting seat; the operation assembly is connected with the pin shaft, the operation assembly drives the pin shaft to be inserted into the pin hole after the locking column slides into the locking C-shaped buckle so as to position the connecting seat and the swinging seat to be relatively fixed, and the operation assembly drives the pin shaft to slide out of the pin hole after the locking column slides out of the locking C-shaped buckle.

3. A connection device for a door closer according to claim 2, wherein the operating assembly comprises an electromagnet, a lever and a signal switch; the electromagnet is arranged on the connecting seat and is connected with the signal switch; the lever can be arranged on the connecting seat in a swinging way, one end of the lever can be attracted by the electromagnetic iron, and the other end of the lever is connected with the pin shaft; the signal switch triggers a signal to the electromagnet after the locking column slides into the locking C-shaped buckle, and the electromagnet drives the lever to swing so as to drive the pin shaft to be inserted into the pin hole.

4. A connecting device for a door closer according to claim 3, wherein a tact spring is provided between the lever and the connecting seat; the signal switch triggers a signal to cause the electromagnet to lose attraction force when the locking column slides out of the locking C-shaped buckle, and the pin shaft can slide out of the pin hole.

5. A connecting device for a door closer according to claim 3, wherein the swing seat is hinged to the connecting seat at a middle portion thereof, one side of the hinge position is formed with the locking C-shaped buckle, and the other side of the hinge position is formed with the pin hole.

6. A connection device for a door closer according to claim 3, wherein a return torsion spring is provided between the swing seat and the connection seat, one end of the return torsion spring being abutted against the swing seat, and the other end of the return torsion spring being abutted against the connection seat.

7. A connecting device for a door closer according to claim 3, wherein the locking C-shaped clasp opening end the locking post slide in and out side is provided with an arcuate guide surface; the locking C-shaped buckle opening end is provided with a locking column which slides in and out from the side to protrude out of the other side.

8. A connecting device for a door closer according to claim 2, wherein the operating assembly includes an adjusting screw and a force spring, the connecting seat is provided with a mounting through hole, and the pin is disposed in the mounting through hole and partially protrudes from the mounting through hole; the adjusting screw is in threaded connection with the mounting through hole; the force application spring is arranged in the installation through hole, one end of the force application spring is abutted against the adjusting screw, and the other end of the force application spring is abutted against the pin shaft.

9. The connecting device for a door closer according to claim 8, wherein the pin hole is provided in the swing seat, and an electromagnet is provided at a side of the swing seat corresponding to the pin hole to magnetically attract the pin shaft.

10. A connection device for a door closer according to claim 1, wherein the first swing arm is fixedly connected to the connection base separately or integrally.

11. A door closer comprising a connecting device according to any one of claims 1 to 10, a first swing arm of the connecting device being for connecting a door or window, and a second swing arm of the connecting device being connected to a door closer body.