CN219365682U - Door handle assembly and drying cabinet - Google Patents

Abstract

A door handle assembly and a dry box, comprising: a substantially flat plate-shaped rotating portion rotatable by an external force; the locking part is arranged on the rotating part body and is used for being connected with the rotating part in a matching way; the door handle assembly is characterized in that: the rotating part is provided with a locking track matched with the locking part, and the locking part can enter the locking track along with the rotation of the rotating part and gradually approaches to the rotation center of the rotating part along with the rotation of the rotating part. Accordingly, the locking degree of the door handle assembly can be adjusted to ensure the sealing effect of the door and the box body.

Description

Door handle assembly and drying cabinet

Technical Field

The present utility model relates to a door handle assembly capable of adjusting a locking degree and a dry box using the same.

Background

The drying box is used as a sealed box body for dehydrating, drying or heat treating a sample, and is a common device in laboratories and production workshops of chemistry, medicine, bioscience and the like. The drying box has very strict sealing requirements, and the sealing effect between the box body and the box door determines the uniformity of the temperature in the box and the heat preservation performance.

In the use, the inside of drying cabinet often heats to the high temperature state, and box and chamber door probably take place to warp, lead to the local clearance to appear in the contact position of box and chamber door, and then make sealed effect variation. Or, the sealing strip between the box body and the box door has the problems of insufficient elasticity or partial collapse due to abrasion, aging and the like, so that the sealing effect is poor when the box door is closed.

The existing drying cabinet is generally provided with a push type door handle, the push type door handle is convenient to open and close, but a gap between a cabinet door and a cabinet body is fixed in a locked state, the locking degree cannot be flexibly adjusted according to the conditions of high-temperature deformation or aging of sealing strips and the like, and the problem that the overall sealing effect is poor cannot be solved.

Therefore, in the prior art, the door handle is reasonably designed to conveniently lock the door and the box body, and the locking degree can be adjusted to ensure the whole sealing effect.

Disclosure of Invention

The utility model aims to provide a door handle assembly capable of adjusting locking degree to ensure integral sealing effect. In order to achieve the above object, one aspect of the present utility model is a door handle assembly comprising: a substantially flat plate-shaped rotating portion rotatable by an external force; the locking part is arranged on the rotating part body and is used for being connected with the rotating part in a matching way; the door handle assembly is characterized in that: the rotating part is provided with a locking track matched with the locking part, and the locking part can enter the locking track along with the rotation of the rotating part and gradually approaches to the rotation center of the rotating part along with the rotation of the rotating part.

According to the technical scheme, the rotating degrees of the rotating parts are different, the locking parts are different from each other towards the rotating center of the rotating parts, namely, the distance between the locking parts and the rotating center can be dynamically adjusted, so that the locking degree between the rotating parts and the locking parts can be adjusted, and the gap between the rotating parts and the locking parts can be adjusted to ensure the sealing effect while the box door and the box body are locked.

In a preferred embodiment, the locking rail is a spiral-shaped groove having an inner diameter that increases with distance from the rotation center of the rotation portion.

According to the technical scheme, the locking part can be along the spiral clamping groove, and gradually approaches the rotation center along with the rotation of the rotating part, so that the matching connection between the rotating part and the locking part is more convenient, and the adjustment range of the locking degree is also larger.

In a preferred embodiment, in a locked state of the rotating portion and the locking portion, the locking rail is a spiral groove provided on the base side, the spiral groove having an inner diameter that increases as the distance from the rotation center increases, the spiral groove being provided on the base side, the spiral groove having an inner diameter that increases as the distance from the rotation center increases.

According to the technical scheme, the spiral clamping groove is in a groove mode, so that the processing is convenient, and meanwhile, the structural strength of the rotating part can be guaranteed.

In a preferred mode, the locking part is provided with a locking base and a locking head which is fixed on the locking base and used for entering the locking track, and a connecting rod is connected between the locking head and the locking base; on the radial section of the connecting rod, the projection of the connecting rod falls into the projection range of the locking head.

According to the technical scheme, the outer diameter of the connecting rod is smaller than that of the locking head, namely, the connecting rod is thinner than the locking head, so that after the locking head enters the locking track, the flange at the edge of the locking track is clamped between the locking head and the locking base more easily, and the locking head is limited conveniently.

In a preferred mode, the lock rail has a rail wall substantially perpendicular to the base side surface of the rotating portion, and an outer edge of the rail wall on the base side has a stopper flange extending from the outer edge in a direction substantially perpendicular to the rail wall; when the locking head enters the locking track, the limiting flange is abutted with the lower surface of one side, close to the locking base, of the locking head, so that the displacement of the locking head in the direction approximately perpendicular to the side surface of the base is limited.

According to the technical scheme, the limit lug of the locking track is clamped between the locking head and the locking base, so that the locking head is prevented from being outwards separated from the locking track along the direction approximately perpendicular to the base side.

In a preferred form, the locking track has a guide slot for guiding the locking head into the locking track.

According to the foregoing technical solution, the locking portion is more easily entered into the locking track under the guidance of the guide groove.

In a preferred form, the door handle assembly further comprises a support portion as a rotation axis of the rotation portion, one end of the support portion being rotatably connected to the rotation center of the rotation portion.

According to the technical scheme, the rotating part is fixed on the supporting part and can rotate around the supporting part, so that the fixing and rotating functions are realized, and meanwhile, the processing and the assembly are convenient.

In a preferred form, the support portion and the rotating portion are connected by a bearing.

In a preferred form, the bearing is a needle bearing.

According to the above technical solution, the needle bearing has a smaller radial dimension and can bear a larger load, so that the needle bearing is more suitable for installation in a small-sized space with a small aperture, such as the rotation center of the rotating part.

In addition, another aspect of the present utility model is a drying oven comprising an oven door, an oven body having an inner chamber with one end opened, one side of the oven door being rotatably connected to the opened end of the oven body, the drying oven characterized in that: the door handle assembly is used for locking the box door and the box body.

The door handle assembly of the embodiment can conveniently lock the door and the box body, and can timely adjust the locking degree of the door handle assembly under the conditions that the door and the box body are deformed by heat or the sealing strips are aged and worn, so that the door and the box body are locked more tightly, and the problem of poor sealing performance is solved.

Drawings

In order to more clearly illustrate the present utility model, the following description and the accompanying drawings of the present utility model will be given. It should be apparent that the figures in the following description merely illustrate certain aspects of some exemplary embodiments of the present utility model, and that other figures may be obtained from these figures by one of ordinary skill in the art without undue effort.

Fig. 1 is an external view of the drying oven of fig. 1 as an example.

FIG. 2 is an overall block diagram of an exemplary door handle assembly.

Fig. 3 is a schematic view of an exemplary rotating portion structure.

Fig. 4 is an exemplary rotating section view.

Fig. 5 is a schematic view of an exemplary support structure.

Fig. 6 is a schematic view of an exemplary locking portion structure.

Fig. 7 is a general schematic view of a scroll-type door handle of the comparative example.

Fig. 8 is an internal structural view of the scroll type door handle of the comparative example.

Description of the drawings:

100. drying box

101. Box body

1011. Side wall of box body

102. Box door

1021. Side wall of box door

103. Elastic sealing element

104. Door handle assembly

1. Rotating part

11. Rotating body

12. Locking track

120. Guide rail

121. Rail wall

1211. Spacing flange

13. Center hole

14. Substrate side

2. Support part

21. Supporting head

22. Support bar

23. Support base

231. Support fixing hole

24. Bearing

3. Locking part

31. Locking head

311. Lower end face

32. Locking connecting rod

33. Locking base

331. Locking fixing hole

104' volute type door handle

1' rotating part

11' rotating body

12' locking track

121' track entrance

2' support part

3' locking part

Detailed Description

Various exemplary embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative, and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, numerical expressions and values, etc. set forth in these embodiments are to be construed as illustrative only and not as limiting unless otherwise stated.

The use of the terms "comprising" or "including" and the like in this disclosure means that elements preceding the term encompass the elements recited after the term, and does not exclude the possibility of also encompassing other elements.

All terms (including technical or scientific terms) used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs, unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Parameters of, and interrelationships between, components, and control circuitry for, components, specific models of components, etc., which are not described in detail in this section, can be considered as techniques, methods, and apparatus known to one of ordinary skill in the relevant art, but are considered as part of the specification where appropriate.

(drying oven)

As one example, the door handle assembly of the present application is used to lock the door and cabinet of a drying oven. The overall construction of the drying cabinet will be described herein with reference to fig. 1, and fig. 1 is an external view of the cabinet.

As shown in fig. 1, the drying oven 100 includes an oven body 101 and an oven door 102. Generally, the case 101 has a cubic structure having an internal chamber and having one end opened, and one side edge of the door 102 is fixedly connected to one side of the opened end of the case 101 by a hinge or the like, so that the door 102 can be opened and closed with respect to the case 101. At least two hinge devices are usually arranged at the joint of the box door 102 and the box body 101 to ensure the stability of the connection of the two hinge devices and avoid displacement deviation of the box door 102 under the action of self weight.

In the usual case, along the locking interface 1012 between the door 102 and the casing 101, an elastic seal 103 is provided for sealing the internal chamber of the casing 101. The elastic sealing element 103 is usually a sealing rubber strip, and is made of rubber, silica gel and other materials with certain elasticity. In the locked state of the door 102 and the case 101, the elastic seal 103 is pressed by the door 102 and the case 101 to be elastically deformed, and when the door 102 is opened, the elastic seal 103 is rebound to return. The size, shape, etc. of the elastic seal 103 are adapted to the shape, size, etc. of the opening of the case 101 to ensure excellent sealing effect.

In the use process, when the drying box 100 is operated to a high temperature, for example, 300 ℃ or higher, the temperature of the inner cavity is higher, and certain deformation of some parts, for example, the inner door plate of the box door 102, is inevitable, so that a local gap exists between the contact part of the box door 102 and the box body 101, and the tightness of the drying box 100 is deteriorated. In addition, after a certain period of use, the elastic sealing member 103 may have a problem of insufficient elasticity or excessively collapsing due to abrasion, aging, etc., even if it is partially compressed, resulting in poor sealing effect when the door 102 is closed.

For this reason, in the present embodiment, door handle assemblies 104 are separately provided at the door side wall 1021 of the door 102 on the side not hinged with the cabinet 101, and at the cabinet side wall 1011 of the cabinet 101 corresponding to the door side wall 1021, for locking the door 102 and the cabinet 101. The door handle assembly 104 can adjust the locking degree under the action of external force to solve the problem of poor tightness of the drying oven 100. For example, when the door 102 or the case 101 is locally deformed due to high temperature, and a local gap is formed between the contact positions of the door 102 and the case 101, the door handle assembly 104 may be manually turned to be more tightly screwed, so that the door 102 presses the elastic sealing member 103 more tightly, thereby enhancing the sealing performance between the door 102 and the case 101.

(door handle assembly)

Next, the specific structure of the door handle assembly 104 will be described in connection with fig. 2-6. Fig. 2 is an overall construction view of the door handle assembly, fig. 3 is a schematic view of a rotating portion, fig. 4 is a sectional view of the rotating portion, fig. 5 is a schematic view of a supporting portion, and fig. 6 is a schematic view of a locking portion.

As one embodiment, as shown in fig. 2, the door handle assembly 104 includes a rotating portion 1, a supporting portion 2, and a locking portion 3 provided separately from the rotating portion 1. The rotating part 1 is fixed to the door side wall 1021 via the supporting part 2, and the locking part 3 is fixed to the cabinet side wall 1011. In the locked state of the door 102 and the case 101, the locking portion 3 is coupled with the rotating portion 1 in a mating manner. In practice, the rotating portion 1 may be fixed to the side wall 1011 of the case body, and the locking portion 3 may be fixed to the side wall 1021 of the case door, that is, the positions of the two may be exchanged, which is also capable of achieving the locking purpose.

The rotary unit 1 will be described in detail.

As shown in fig. 3, the rotating unit 1 includes a substantially flat plate-shaped rotating body 11, and the rotating body 11 is rotatable about a normal line of the center hole 13 by an external force, and the rotating body 11 may have a quincuncial shape as shown, a polygonal shape, a circular shape, or the like. The rotating body 11 is provided with a locking track 12 matched with the locking part 3, and the locking part 3 can enter the locking track 12 along with the rotation of the rotating body 11 and gradually approaches the central hole 13 along with the rotation of the rotating body 11.

Specifically, the lock rail 12 is a spiral-shaped engagement groove having an inner diameter that increases with distance from the center hole 13. At this time, the locking track 12 may be a groove pattern or a hollowed pattern penetrating the rotating body 11. The hollow pattern penetrating the rotary body 11 can also have the effect of being connected with the locking part 3 in a matching manner, but also brings about the problem of reduced structural strength, which is not repeated here for the sake of simplicity.

Preferably, in the locked state of the rotating portion 1 and the locking portion 3, if the side surface of the rotating body 11 facing the locking portion 3 is the base side 14, the locking rail 12 is a spiral groove provided on the base side 14 starting from the center hole 13 and having an inner diameter that increases as it moves away from the center hole 13. In this case, the lock rail 12 may be formed by being recessed directly from the surface of the base side 14 in the normal direction of the base side 14, or may be formed by being extended outwardly from the surface of the base side 14 in the normal direction of the base side 14, and for simplicity, only the recessed portion will be described as an example.

As shown in fig. 4, the lock rail 12 has a rail wall 121 substantially perpendicular to the base side 14 of the rotating portion 1, and an outer edge of the rail wall 121 on the base side 14 has a stopper flange 1211 extending from the outer edge in a direction substantially perpendicular to the rail wall 121. The stopper projection 1211 may extend from the outer edge of the rail wall 121 in a direction toward the center hole 13, may extend in a direction away from the center hole 13, or may extend in both directions toward the center hole 13 and away from the center hole 13, and for simplicity, only the stopper flange 1211 will be described as extending in a direction toward the center hole 13.

The locking portion 3 will be specifically described below.

As an example, as shown in fig. 6, the locking portion 3 includes a locking base 33, a locking head 31, and a locking link 32 connected between the locking base 33 and the locking head 31. The locking base 33 is provided with a locking fixing hole 331 in the form of a through hole, and the locking portion 3 is fixed to the case 101 by passing a screw through the locking fixing hole 331.

The locking head 31 may have various forms of a cylindrical shape, a spherical shape, etc., as long as it is adapted to the locking rail 12, and a cylindrical shape is illustrated as an example. The outer diameter of the locking connecting rod 32 is smaller than the outer diameter of the locking head 31, namely, the connection part of the lower end face 311 of the locking head 31, which is close to the locking base 33, and the locking connecting rod 32 is a step surface, or a conical inclined surface with smaller outer diameter, which is closer to the locking base 33.

As shown in fig. 2 and 6, when the locking head 31 enters the locking rail 12, the stopper 1211 abuts against the lower end surface 311 of the locking head 31 near the locking base 33, thereby restricting displacement of the locking head 31 in a direction substantially perpendicular to the base side 14, i.e., preventing the locking head 31 from being pulled out of the locking rail 12 in a direction substantially perpendicular to the base side 14.

In another example, the locking head 31 and the locking link 32 may have the same outer diameter, integrally form a long cylinder connected to the locking base 33, and then a locking groove is provided on a radial surface of the long cylinder, and when an end of the long cylinder far from the locking base 33 enters the locking track 12, the locking flange 1211 is locked into the locking groove, which also has an effect of restricting the locking portion 3 from being released outward in a direction substantially perpendicular to the base side 14.

However, compared with the scheme of the clamping groove, in the scheme that the outer diameter of the locking connecting rod 32 is smaller than the outer diameter of the locking head 31, the locking head 31 and the locking base 33 have a larger distance, so that the limit flange 1211 can be clamped between the locking head 3 and the locking base 33 more easily, and the locking head 3 can enter the locking track 12 more conveniently.

The mating connection of the rotating part 1 and the locking part 3 will be described below.

In use, in the closed state of the door 102 and the case 101, the rotation body 11 of the rotation part 1 is twisted by a man power to rotate the locking rail 12 therewith, thereby allowing the locking head 31 to enter the locking rail 12. Since the locking rail 12 is a pattern with the central hole 13 as a starting point and the inner diameter of the locking head 31 is larger as the central hole 13 is further away from the central hole 13, the locking head 31 gradually approaches the central hole 13 along the locking rail 12 as the rotation of the rotary body 11 is continued, and thus the box door 102 fixedly connected with the rotary part 1 and the box body 101 fixedly connected with the locking part 3 are locked more tightly.

It will be appreciated that in view of the base side 14 facing the rotating body 11, i.e. facing the locking track 12, the rotating body 11 should be rotated in the same direction as the spiral direction of the locking track 12, and in the example shown in fig. 3, since the locking track 12 is spiral clockwise, the rotating body 11 should also be rotated clockwise to allow the locking head 31 to smoothly enter the entrance of the locking track 12.

Furthermore, it is preferable that the rotating body 11 is provided with a guide rail 120 at an entrance of the locking rail 12, and the guide rail 120 generally has a larger opening size than the locking rail 12 of the rear stage so as to guide the locking head 31 into the locking rail 12.

The supporting portion 2 will be specifically described below.

As shown in fig. 5, the door handle assembly 104 further includes a support portion 2, and the support portion 2 includes a support head 21, a support rod 22, and a support base 23. The support base 23 has a support fixing hole 231 of a through-hole pattern, and the support portion 2 is fixed to the door 102, typically by a screw passing through the support fixing hole 231.

The support head 21 is rotatably coupled to the central hole 13 of the rotary body 11, preferably, the support head 21 is coupled to the central hole 13 through a bearing 24. In this way, the rotating unit 1 can be fixed to the door 102 together with the support base 23, and the rotating unit 1 can also perform a rotating operation about the central axis of the bearing 24.

As an example, as shown in fig. 3, the center hole 13 may have a hexagonal shape, or may have another shape, mainly matching the radially outer shape and size of the bearing 24, so that the rotating portion 1 rotates around the center axis of the bearing 24 through the center hole 13.

In one embodiment, the bearing 24 is a needle bearing, i.e. the rollers are elongated cylinders having a smaller radial cross section but a longer length in the direction along the central axis of the bearing 24, thereby making the radial structure of the bearing 24 more compact and also capable of bearing larger loads, suitable for mounting in a structure of limited radial dimensions of the central bore 13.

In general, by providing the spiral locking rail 12 on the rotating part 1, when the rotating part 1 is rotated by an external force, the locking part 3 enters the locking rail 12 and gradually approaches the center hole 13 of the rotating part 1, thereby locking the door 102 and the case 101. The rotation angle of the rotation part 1 is different, and the locking degree of the locking part 3 towards the center hole 13 of the rotation part 1 is also different, namely the utility model can dynamically adjust the distance between the locking part 3 and the center hole 13, thereby adjusting the locking degree between the rotation part 1 and the locking part 3.

In general, a sufficient margin is left in the design, i.e., in normal circumstances, the door 102 and the case 101 are locked to each other when the locking portion 3 is located at a distance from the center hole 13. When the sealing performance between the box door 102 and the box body 101 is deteriorated due to the partial deformation or the aging and breakage of the elastic sealing member 103 caused by the high temperature inside, the rotating part 1 can be screwed more tightly, namely, the rotating angle is larger, so that the locking part 3 is kept closer to the central hole 13, the box door 102 and the box body 101 are closed more tightly, and the tightness of the drying box 100 is ensured by the mode of adjusting the locking degree.

Comparative example

Next, comparative examples of the present utility model will be described with reference to fig. 7 to 8. Fig. 7 is an overall schematic view of a comparative example of a volute type door handle, and fig. 8 is an internal structural view of the comparative example of the volute type door handle.

Fig. 7 shows a volute type door handle 104' including a rotating portion 1' fixed to a door 102 and a locking portion 3' fixed to a case 101. In the closed state of the door 102, the rotating part 1 'rotates under the action of external force and is connected with the locking part 3' in a matching way, so that the purpose of locking is achieved.

Fig. 8 is a schematic view showing an inner side structure of the volute type door handle 104 'adjacent to the door 102, including the rotating body 11', the locking rail 12', and the rail entrance 121'. Wherein the locking track 12' is a curved recess as shown.

In the closing process of the door 102, the rotating body 11' is first lifted manually, the rail entrance 121' is moved above the locking portion 3', and then the rotating body 11' is manually pressed, at this time, the locking portion 3' enters the locking rail 12' from the rail entrance 121' and gradually approaches the supporting portion 2' along the locking rail 12', so that the rotating portion 1' and the locking portion 3' are locked more tightly.

When the sealing performance between the door 102 and the case 101 is deteriorated due to the high temperature inside the case, such as partial deformation, aging of the elastic sealing member, breakage, etc., the rotating portion 1' can be screwed more tightly, and the locking portion 3' continues to be closer to the supporting portion 2', so that the door 102 and the case 101 are more tightly closed.

The present utility model is provided with the spiral locking rail 12 having the larger inner diameter farther from the rotation center than the comparative example, and the locking part 3 has a longer moving distance in the spiral locking rail 12 than the locking rail 12' of the comparative example, thereby allowing a larger margin for the rotatable angle of the rotating part 1. Therefore, when the sealing degree between the box door 102 and the box body 101 is adjusted, a larger adjusting range can be provided, so that the sealing performance requirement in more situations can be met.

It should be understood that the above embodiments are only for explaining the present utility model, the protection scope of the present utility model is not limited thereto, and any person skilled in the art should be able to modify, replace and combine the technical solution and concept according to the present utility model within the scope of the present utility model.

Claims (10)

1. A door handle assembly, comprising:

a substantially flat plate-shaped rotating portion rotatable by an external force;

the locking part is arranged on the rotating part body and is used for being connected with the rotating part in a matching way;

the rotating part is provided with a locking track matched with the locking part, and the locking part can enter the locking track along with the rotation of the rotating part and gradually approaches to the rotation center of the rotating part along with the rotation of the rotating part.

2. The door handle assembly of claim 1, wherein:

the locking track is a spiral clamping groove which takes the rotation center of the rotation part as a starting point and has larger inner diameter as the rotation center is farther away.

3. The door handle assembly of claim 2, wherein:

in the locked state of the rotating portion and the locking portion, if a surface of the rotating portion facing the locking portion is a base side, the locking track is a spiral groove provided on the base side and having an inner diameter that increases as the distance from the rotation center increases, with the rotation center as a starting point.

4. A door handle assembly according to claim 3, wherein:

the locking part is provided with a locking base, a locking head which is fixed on the locking base and used for entering the locking track, and a connecting rod is connected between the locking head and the locking base;

on the radial section of the connecting rod, the projection of the connecting rod falls into the projection range of the locking head.

5. The door handle assembly of claim 4, wherein:

the lock rail has a rail wall substantially perpendicular to the base side surface of the rotating portion, and an outer edge of the rail wall on the base side has a stopper flange extending from the outer edge in a direction substantially perpendicular to the rail wall;

when the locking head enters the locking track, the limiting flange is abutted with the lower surface of one side, close to the locking base, of the locking head, so that the displacement of the locking head in the direction approximately perpendicular to the side surface of the base is limited.

6. The door handle assembly of claim 5, wherein:

the locking track has a guide slot for guiding the locking head into the locking track.

7. The door handle assembly of claim 1, wherein:

the door handle assembly further includes a support portion as a rotation shaft of the rotation portion, one end of the support portion being rotatably connected to the rotation center of the rotation portion.

8. The door handle assembly of claim 7, wherein:

the supporting part is connected with the rotating part through a bearing.

9. The door handle assembly of claim 8, wherein:

the bearing is a needle bearing.

10. A drying cabinet, its characterized in that:

comprises a box door and a box body, wherein the box body is provided with an inner cavity with one end open, one side of the box door is rotatably connected with the open end of the box body,

further comprising the door handle assembly of any one of claims 1-9 for locking the door and the cabinet.