Sectional type push rod trigger device and household appliance comprising same

Abstract

The utility model discloses a sectional type push rod trigger device and a household appliance comprising the same, the sectional type push rod trigger device comprises a rack push rod, a sliding rod and a sensing assembly, the rack push rod is driven by a driving assembly to do reciprocating motion and is used for pushing and opening a door body; the sliding rod can generate corresponding follow-up action along with the movement of the door body; the sensing assembly comprises a second microswitch used for detecting the position of the sliding rod. The opening and closing states of the door body are monitored in real time through the triggering state of the second microswitch. Through the cooperation of the sliding rod and the microswitch, whether the door body is completely opened or not can be detected, whether the door body is closed in place or not can also be detected, and safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic door opening of electrical appliances, in particular to a segmented push rod trigger device and a household appliance comprising the same. Background Art

[0002] For the sake of appearance, most of the existing dishwashers and other household appliances on the market have eliminated the door handle design and equipped with an automatic door push mechanism. At the same time, the door lock is also eliminated to save costs. The automatic door push mechanism can push the door of the household appliance to a certain angle to facilitate the user to open the door. However, after the automatic door push mechanism pushes the door into place, it is unknown whether the user will continue to open it. Similarly, if the door lock is eliminated, it is unknown whether the door is closed in place. This not only greatly reduces the reliability of household appliances, but also poses certain risks. Utility Model Content

[0003] In order to solve the technical problem that the door pushing mechanism in the prior art cannot judge whether the door body is opened by the user or closed in place, which poses certain risks, the utility model provides a segmented push rod trigger device and a household appliance containing the same to solve the above problem.

[0004] The utility model proposes a segmented push rod trigger device, comprising a rack push rod, a sliding rod and a sensing component. The rack push rod reciprocates under the drive of the driving component and is used to push open a door body. The sliding rod can produce corresponding follow-up actions as the door body moves. The sensing component comprises a second micro switch for detecting the position of the sliding rod. The opening and closing states of the door body are monitored in real time through the triggering state of the second micro switch.

[0005] Furthermore, the sensing component also includes a first micro switch for detecting the position of the rack push rod, and the opening and closing states of the door body are monitored in real time through the triggering states of the two micro switches.

[0006] Furthermore, the trigger device also includes a shell having a guide rail, and a rack push rod is slidably arranged on the guide rail. The end of the sliding rod away from the door body is connected to the rack push rod through an elastic member, and the extension and contraction direction of the elastic member is parallel to the movement direction of the rack push rod. When the door body is not fully opened, the sliding rod is squeezed by the door body and the elastic member is in a compressed state.

[0007] Furthermore, the first micro switch is triggered by the rack push rod when the door is closed; the second micro switch is triggered by the sliding rod when the door is closed and the rack push rod is fully pushed out.

[0008] Furthermore, the rack push rod is provided with a first boss for triggering the first micro switch, the sliding rod is provided with a second boss for triggering the second micro switch when the door is closed, and a third boss for triggering the second micro switch when the rack push rod is fully pushed out.

[0009] Furthermore, a rack is provided on one side of the rack push rod, and a slide rail is provided on the other side. A limiting rib is provided on the slide rail. The sliding rod includes a sliding groove that slidably cooperates with the slide rail and a yielding groove that slidably cooperates with the limiting rib. The limiting rib abuts against the yielding groove at the extended limit position of the sliding rod.

[0010] Furthermore, two of the limiting ribs and two of the giving way grooves are provided respectively, and the two giving way grooves are located at the upper and lower sides of the sliding groove respectively, and the two limiting ribs are in contact with the upper and lower giving way grooves at the extended limit position of the sliding rod.

[0011] Furthermore, a support rod is provided at the end of the sliding rod, and the support rod includes a support plate and connecting blocks and support columns located at both ends of the support plate. A fixed column is provided on the rack push rod, and the connecting block is inserted into the end of the sliding rod. The two ends of the elastic member are respectively mounted on the fixed column and the support column.

[0012] Furthermore, one end of the slide groove facing the elastic member has an opening, and the connecting block is inserted into the opening.

[0013] Furthermore, the sensing component includes two micro switches for detecting the movement state of the sliding rod. The two micro switches are triggered respectively by the sliding rod under different movement states of the sliding rod. When the door body is closed, one of the micro switches is triggered, and when the door body is fully opened, the other micro switch is triggered.

[0014] The utility model also provides a household appliance, comprising the above-mentioned segmented push rod trigger device.

[0015] The beneficial effects of the utility model are:

[0016] (1) The utility model utilizes the cooperation between the sliding rod and the micro switch to detect whether the door body is fully opened or fully closed, thus having high safety.

[0017] (2) The utility model has a reliable structure and relatively low cost, which greatly improves the practicality of the product during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is an exploded view of the segmented push rod trigger device described in the utility model;

[0020] Figure 2 It is a three-dimensional diagram of the housing in the utility model;

[0021] Figure 3 It is a schematic diagram of the top view of the rack push rod in the utility model;

[0022] Figure 4 It is a bottom view schematic diagram of the rack push rod in the utility model;

[0023] Figure 5 It is a schematic diagram of the top view of the sliding rod in the utility model;

[0024] Figure 6 It is a bottom perspective schematic diagram of the sliding rod in the utility model;

[0025] Figure 7 It is a three-dimensional diagram of the support rod in the utility model;

[0026] Figure 8 This is a state diagram of the segmented push rod trigger device of the utility model when the door body is in a closed state;

[0027] Fig. 9 This is a state diagram of the segmented push rod trigger device of the utility model when the door body is pushed open;

[0028] Fig.10 It is a state diagram of the segmented push rod trigger device of the utility model when the rack push rod is fully extended;

[0029] Fig.11 It is a state diagram of the segmented push rod trigger device of the utility model after the user opens the door body;

[0030] Fig.12 yes Fig.11 Schematic diagram of the limiting relationship between the sliding rod and the rack push rod in the state shown;

[0031] Fig.13 This is a state diagram of the segmented push rod trigger device of the utility model when the rack push rod is retracted and the door body is not closed.

[0032] In the figure, 1, shell, 11, guide rail, 12, first mounting seat, 13, second mounting seat, 21, first micro switch, 22, second micro switch, 3, rack push rod, 31, push-out end, 32, slide rail, 33, upper limit rib, 34, first boss, 35, fixed column, 36, lower limit rib, 37, guide groove, 38, rack, 4, elastic member, 5, support rod, 51, support column, 52, support plate, 53, connecting block, 6, sliding rod, 61, contact end, 62, second boss, 63, third boss, 64, upper make way groove, 65, lower make way groove, 66, slide groove, 67, end. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] like Figure 1 As shown, a segmented push rod trigger device includes a rack push rod 3, a sliding rod 6 and a sensing component. The rack push rod 3 reciprocates under the drive component to push open the door. The drive component generally refers to a gear transmission structure driven by a motor. The forward and reverse rotation of the motor drives the rack push rod 3 to extend or retract. When extended, the door can be pushed open to a certain angle. The sliding rod 6 can produce a corresponding follow-up action with the movement of the door. The sensing component includes a second micro switch 22 for detecting the position of the sliding rod 6; the opening and closing state of the door is monitored in real time through the trigger state of the second micro switch 22.

[0035] The movement state of the sliding rod 6 is affected by the door body. When the door body is closed, pushed open by the rack push rod 3 to a certain angle, or fully opened, the sliding rod 6 is in different states respectively, so that the opening and closing state of the door body can be judged by the movement state of the sliding rod 6. It can detect whether the door body is fully opened or closed, which is safer.

[0036] When only the second micro switch 22 is used, the second micro switch 22 can be triggered in different states by setting a plurality of contacts on the sliding rod 6 .

[0037] In other optional embodiments, there may be two micro switches for detecting the movement state of the sliding rod 6. The two micro switches are respectively triggered by the sliding rod 6 under different movement states of the sliding rod 6. When the door body is closed, one of the micro switches is triggered, and when the door body is fully opened, the other micro switch is triggered. It is also possible to choose that when the door body is closed, one of the micro switches is triggered, and when the rack push rod 3 is fully pushed out, the other micro switch is triggered. At this time, when the user opens the door body, the sliding rod 6 is extended accordingly, and the triggered micro switch is released, indicating that the door body is fully open.

[0038] Since the movement state of the rack push rod 3 is not affected by the opening and closing actions of the door body and only cooperates with the driving assembly, in order to avoid misoperation of the door body when the rack push rod 3 is not fully extended or fully retracted, a micro switch for detecting the movement state of the rack push rod 3 is required. Therefore, the sensing assembly in the utility model preferably includes two micro switches, namely a first micro switch 21 for detecting the position of the rack push rod 3 and a second micro switch 22 for detecting the position of the sliding rod 6. The opening and closing states of the door body are monitored in real time through the triggering states of the two micro switches.

[0039] There are two key motion states of the rack push rod 3: a fully extended state and a fully retracted state.

[0040] There are three key motion states of the sliding rod 6: a fully retracted state, a partially extended state (when the rack push rod 3 is fully extended), and a fully extended state.

[0041] The first micro switch 21 and the second micro switch 22 can be selectively triggered in the above-mentioned key motion states to achieve position monitoring. In a preferred embodiment of the utility model, the first micro switch 21 is triggered by the rack push rod 3 when the door is closed, and the second micro switch 22 is triggered by the sliding rod 6 when the door is closed and the rack push rod 3 is fully pushed out.

[0042] The rack push rod 3 is provided with a first boss 34 for triggering the first micro switch 21, and the sliding rod 6 is provided with a second boss 62 for triggering the second micro switch 22 when the door body is closed and a third boss 63 for triggering the second micro switch 22 when the rack push rod 3 is fully pushed out. When the door body is closed, the rack push rod 3 is in a retracted state, and the first boss 34 triggers the first micro switch 21. When the rack push rod 3 extends outward to push the door body open, the first boss 34 leaves the first micro switch 21, and the triggering ends. Similarly, when the door body is closed, the sliding rod 6 is in a retracted state, and the second boss 62 triggers the second micro switch 22. When the rack push rod 3 is fully pushed out, the door body is pushed open by a certain angle, the sliding rod 6 extends a certain length, and the third boss 63 triggers the second micro switch 22. When the door body is continued to be opened by the user, the sliding rod 6 continues to extend, and the triggering of the second micro switch 22 ends, thereby judging that the door body has been fully opened.

[0043] The sliding rod 6 can achieve state change through other driving units linked with the door body or the rack push rod 3. The utility model is realized by elastic connection between the rack push rod 3 and the sliding rod 6. The specific structure is:

[0044] like Figure 1 , Figure 2 and Figure 8As shown, the trigger device also includes a housing 1 with a guide rail 11, a rack push rod 3 is slidably arranged on the guide rail 11, an outlet is arranged at one end of the housing 1, and the rack push rod 3 extends out of the housing 1 through the outlet when pushing the door, and the end of the sliding rod 6 away from the door body is connected to the rack push rod 3 through an elastic member 4, and the expansion direction of the elastic member 4 is parallel to the movement direction of the rack push rod 3. When the door body is not fully opened, the sliding rod 6 is squeezed by the door body, and the elastic member 4 is in a compressed state. The elastic member 4 can be a spring, a compression spring or other elastically expandable structure. When the rack push rod 3 is extended, the rack push rod 3 can drive the sliding rod 6 to slide a certain distance, so that the second micro switch 22 is triggered by the third boss 63; in addition, when the rack push rod 3 is stationary, the sliding rod 6 can also move accordingly due to the change of the state of the door body, for example, after the door body is fully opened, the sliding rod 6 is pushed out by the elastic member 4, and when the door body is closed, the sliding rod 6 is pushed by the door body to retract into the housing 1.

[0045] Rack push rod 3:

[0046] A rack 38 is provided on one side of the rack push rod 3 for cooperating with the gear of the driving assembly, and a slide rail 32 is provided on the other side. A limit rib is provided on the slide rail 32. The slide rod 6 includes a slide groove 66 that slidably cooperates with the slide rail 32 and a clearance groove that slidably cooperates with the limit rib. The limit rib abuts against the clearance groove at the extended limit position of the slide rod 6. Figure 3-Figure 6 As shown, the first boss 34 and the rack 38 are arranged on the same side of the rack push rod 3, the bottom of the rack push rod 3 is provided with a guide groove 37 that slides with the guide rail 11, the second boss 62 and the third boss 63 are located on one side of the sliding rod 6, the slide groove 66 is located on the other side of the sliding rod 6, the sliding rod 6 slides with the rack push rod 3, one end of the slide groove 66 is open, and it is convenient to plug and install with the slide rail 32, and the first mounting seat 12 for mounting the first micro switch 21 is arranged at the end close to the interior of the housing 1, and the second mounting seat 13 for mounting the second micro switch 22 is arranged at the end close to the exit. The setting of the limit rib and the clearance groove is to prevent the sliding rod 6 from detaching from the housing 1 after the door body is opened.

[0047] As a preferred embodiment, two limiting ribs and two giving way grooves are provided respectively, and the two giving way grooves are located at the upper and lower sides of the slide groove 66, respectively. The two limiting ribs are in contact with the upper and lower giving way grooves at the extended limit position of the sliding rod 6. Figure 3-Figure 6As described above, the limiting ribs are divided into an upper limiting rib 33 and a lower limiting rib 36, and correspondingly, the giving way grooves are divided into an upper giving way groove 64 and a lower giving way groove 65. The sliding rod 6 is a double-layer structure, the upper giving way groove 64 is located at the upper layer and passes through the upper layer structure, and the lower giving way groove 65 is located at the lower layer and passes through the lower layer structure. The upper limiting rib 33 protrudes upward from the surface of the slide rail 32 and slides in the upper giving way groove 64, and the lower limiting rib 36 protrudes downward from the surface of the slide rail 32 and slides in the lower giving way groove 65. Since the limiting rib only needs to limit the maximum length of extension, it only needs to be able to abut against one end of the giving way groove. The upper limiting rib 33 and the lower limiting rib 36 in this embodiment are structures that are tilted upward and downward from the surface of the slide rail 32, respectively, and the tilting direction is toward the direction of the end face abutting against the giving way groove. When the sliding rod 6 extends outward relative to the rack push rod 3, the limiting rib gradually approaches the end face of the giving way groove until the tilted end of the limiting rib abuts against the end face of the giving way groove. When the sliding rod 6 and the rack push rod 3 are installed, the front end of the slide rail 32 (the front end is the end facing the extending direction) is inserted into the slide groove 66. When the limiting rib meets the slide groove 66, the connecting end of the limiting rib and the slide rail 32 enters the slide groove 66 first. The inclined surface of the limiting rib can help the limiting rib to smoothly enter the slide groove 66.

[0048] In further design, Figure 3 and Figure 7 As shown, a support rod 5 is provided at the end of the sliding rod 6, and the support rod 5 includes a support plate 52 and a connecting block 53 and a supporting column 51 located at both ends of the supporting plate 52. A fixing column 35 is provided on the rack push rod 3, and the connecting block 53 is plugged into the end of the sliding rod 6. The two ends of the elastic member 4 are respectively sleeved on the fixing column 35 and the supporting column 51. The fixing column 35 and the supporting column 51 provide fixed fulcrums for the elastic member 4. The detachable connection between the support rod 5 and the sliding rod 6 makes the installation, replacement and maintenance of the components more convenient. Figure 6 and Fig.12 As shown, one end of the slide groove 66 facing the elastic member 4 has an opening, and the connecting block 53 can be inserted into the opening, which is convenient for installation.

[0049] Working principle introduction:

[0050] like Figure 8 The figure shows the assembly diagram of the rack push rod 3 and the sliding rod 6 when the door is closed:

[0051] ①. At this time, the rack push rod 3 and the sliding rod 6 are both in the initial positions. The rack push rod 3 is in a retracted state under the action of the internal driving component of the automatic door opening mechanism, and the sliding rod 6 is blocked by the door body, and its contact end 61 is flush with the push-out end 31 of the rack push rod 3. The contact end 61 is the end of the sliding rod 6 facing the door body, and the push-out end 31 is the end of the rack push rod 3 facing the door body.

[0052] ②. One end of the spring is in contact with the fixed column 35 of the rack push rod 3, and the other end is in contact with the support column 51 of the support rod 5; the support rod 5 is in contact with the sliding groove of the sliding rod 6 through its connecting block 53, and at the same time, the support plate 52 is in contact with the end 67 of the sliding rod 6 under the elastic force of the spring, so as to realize the indirect connection between the spring and the sliding rod 6; at this time, the spring is also in a compressed state due to the influence of the slide rail 32.

[0053] ③. At the same time, the first micro switch 21 and the second micro switch 22 are in contact with the first boss 34 and the second boss 62 respectively, thereby triggering the two micro switches. Both micro switches are in the triggered state, which also indicates that the door body is in the closed state at this time.

[0054] When the door is pushed open, Fig. 9 As shown:

[0055] ① The driving assembly inside the automatic door opening mechanism drives the rack push rod 3 to extend outward, and the spring, support rod 5 and sliding rod 6 are all installed on the rack push rod 3 and extend outward accordingly;

[0056] ②. As the rack push rod 3 extends, the first micro switch 21 and the second micro switch 22 are both in the released state.

[0057] When the rack push rod 3 is fully extended, Fig.10 As shown:

[0058] ①. At this time, the third boss 63 of the sliding rod 6 contacts the second micro switch 22, so that the second micro switch 22 is in a triggered state.

[0059] ② Although the rack push rod 3 pushes the door body into place, the user does not continue to open the door body at this time, so the contact end 61 of the sliding rod 6 and the push-out end 31 of the rack push rod 3 are still in a flush state.

[0060] When the user opens the door, Fig.11 As shown:

[0061] ①. After the user opens the door, the sliding rod 6 is not limited by the door. Under the action of the spring, the sliding rod 6 is pushed outward by the elastic force, so that the third boss 63 of the sliding rod 6 is separated from the second micro switch 22. In this way, the signal of the second micro switch 22 is changed from triggered to released, indicating that the door is opened by the user.

[0062] ②, under the action of elastic force, the slide groove 66 of the slide rod 6 extends outward along the slide rail 32 until the upper and lower grooves 64 and 65 thereof contact the upper and lower limit ribs 33 and 36 respectively (such as Fig.12 As shown in the figure), the sliding rod 6 is blocked by the two limiting ribs and the spring cannot move it any further.

[0063] ③. At this time, it can also be seen that the contact end 61 of the sliding rod 6 exceeds the end surface of the pushing end 31 of the rack push rod 3.

[0064] When the rack push rod 3 is retracted, Fig.13 As shown:

[0065] ① After the user opens the door, the automatic door opening mechanism drives the rack push rod 3 to retract to the initial position. At this time, the first boss 34 contacts and cooperates with the first micro switch 21, so that the first micro switch 21 is triggered, indicating that the rack push rod 3 is retracted into place.

[0066] ② At this time, because there is no door blocking, the contact end 61 of the sliding rod 6 is still in the extended state under the elastic force of the spring, and the second micro switch 22 is in the released state, which also indicates that the door is not closed.

[0067] When the user closes the door, it returns to Figure 8 Status shown:

[0068] ① At this time, the sliding rod 6 is also retracted to the initial position under the action of the door body;

[0069] ②, the second micro switch 22 is in contact with the second boss 62, and the second micro switch 22 is in a triggered state;

[0070] ③. Both the first micro switch 21 and the second micro switch 22 are in the triggered state, indicating that the door is fully closed.

[0071] The utility model also provides a household appliance, comprising the above-mentioned segmented push rod trigger device.

[0072] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0073] Furthermore, the terms “first”, “second”, etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

[0074] In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments.

[0075] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A segmented push rod trigger device, characterized in that: include: The rack push rod reciprocates under the drive assembly to push the door open; The sliding rod can produce corresponding follow-up movements as the door moves; a sensing assembly including a second micro switch for detecting a position of the slide rod; The opening and closing states of the door body are monitored in real time through the triggering state of the second micro switch.

2. The segmented push rod trigger device according to claim 1, characterized in that: The sensing component also includes a first micro switch for detecting the position of the rack push rod, and the opening and closing states of the door body are monitored in real time through the triggering states of the two micro switches.

3. The segmented push rod trigger device according to claim 1 or 2, characterized in that: The trigger device also includes a shell with a guide rail, and a rack push rod is slidably arranged on the guide rail. The end of the sliding rod away from the door body is connected to the rack push rod through an elastic member, and the extension direction of the elastic member is parallel to the movement direction of the rack push rod. When the door body is not fully opened, the sliding rod is squeezed by the door body and the elastic member is in a compressed state.

4. The segmented push rod trigger device according to claim 2, characterized in that: The first micro switch is triggered by the rack push rod when the door is closed; the second micro switch is triggered by the sliding rod when the door is closed and the rack push rod is fully pushed out.

5. The segmented push rod trigger device according to claim 4, characterized in that: The rack push rod is provided with a first boss for triggering the first micro switch, the sliding rod is provided with a second boss for triggering the second micro switch when the door is closed, and a third boss for triggering the second micro switch when the rack push rod is fully pushed out.

6. The segmented push rod trigger device according to claim 3, characterized in that: A rack is arranged on one side of the rack push rod, and a slide rail is arranged on the other side. A limiting rib is arranged on the slide rail. The sliding rod includes a sliding groove slidably matched with the slide rail and a yielding groove slidably matched with the limiting rib. The limiting rib abuts against the yielding groove at the extended limit position of the sliding rod.

7. The segmented push rod trigger device according to claim 6, characterized in that: The two limiting ribs and the two giving way grooves are respectively provided with two corresponding ones, and the two giving way grooves are respectively located at the upper and lower sides of the sliding groove, and the two limiting ribs are both in contact with the upper and lower giving way grooves at the extended limit position of the sliding rod.

8. The segmented push rod trigger device according to claim 6, characterized in that: A support rod is provided at the end of the sliding rod, and the support rod includes a support plate and connecting blocks and support columns located at both ends of the support plate. A fixed column is provided on the rack push rod. The connecting block is plugged into the end of the sliding rod, and both ends of the elastic member are respectively sleeved on the fixed column and the support column.

9. The segmented push rod trigger device according to claim 8, characterized in that: One end of the slide groove facing the elastic member has an opening, and the connecting block is inserted into the opening.

10. The segmented push rod trigger device according to claim 1, characterized in that: The sensing component includes two micro switches for detecting the movement state of the sliding rod. The two micro switches are triggered respectively by the sliding rod under different movement states of the sliding rod. When the door body is closed, one of the micro switches is triggered, and when the door body is fully opened, the other micro switch is triggered.

11. A household appliance, characterized in that: A segmented push rod trigger device comprising any one of claims 1-10.

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