An automatic locking device for a spray head assembly in a pulse flush gun

Abstract

The utility model discloses a kind of automatic locking devices for spray head assembly in pulse flush gun, including mutually assembled right casing and left casing, pump head located in right casing and left casing inside, spray head assembly and reset spring with pump head detachable connection, the end of right casing and left casing is respectively symmetrical to the outside and is extended to form card slot one and card slot two, automatically sliding lock catch is set between card slot one and card slot two, the lock catch abuts against the locking disc of spray head assembly end for locking. Realize the locking of spray head assembly, simple to install, convenient to disassemble.

Description

Technical Field

[0001] This utility model relates to the field of pulse flushing gun technology, and specifically to an automatic locking device for the nozzle assembly in a pulse flushing gun. Background Technology

[0002] In the medical field, pulse irrigation guns are often used to clean wound tissues. The pulsed water jets sprayed by the pulse irrigation gun with a certain pressure cause bacteria, foreign objects and other debris in the wound to be separated from the tissue by the bouncing action, thus achieving the purpose of thorough wound cleaning.

[0003] In clinical irrigation procedures, the nozzle assembly is first installed onto the pump head of the pulse irrigation gun. To prevent the connection between the nozzle assembly and the pump head from loosening or detaching during irrigation, a locking buckle needs to be installed near the connection point to secure the nozzle assembly and prevent it from loosening or detaching during use.

[0004] Currently, the locking device used in similar products requires pushing the latch before and after the nozzle assembly is installed to insert and lock it in place, causing inconvenience during use.

[0005] Therefore, this application is made. Utility Model Content

[0006] The purpose of this invention is to provide an automatic locking device for the nozzle assembly in a pulse flushing gun. The device automatically slides by pushing the inclined surface of the locking boss on the inclined surface of the locking plate. During the sliding process, the first locking boss and the second locking boss abut against the top of the locking plate, so that the locking buckle automatically slides to lock the nozzle assembly. The device is simple to install and easy to disassemble, and solves the problems existing in the prior art.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0008] An automatic locking device for a nozzle assembly in a pulse flushing gun includes a right housing and a left housing assembled together, a pump head located inside the right housing and the left housing, a nozzle assembly detachably connected to the pump head, and a return spring. The ends of the right housing and the left housing extend symmetrically outward to form a first slot and a second slot, respectively. An automatically sliding latch is provided between the first slot and the second slot, and the latch abuts against a locking disc at the end of the nozzle assembly for locking.

[0009] Furthermore, the locking disc is located inside the latch, and recess one and recess two are respectively provided on both sides of the locking disc. The inner wall of the latch is provided with locking boss one and locking boss two that correspond one-to-one with recess one and recess two, respectively. The width of recess one and recess two is greater than the width of locking boss one and locking boss two, respectively.

[0010] Furthermore, the right housing has a sliding surface 1 for locking on both sides of the slot 1, and the left housing has a sliding surface 2 for locking on both sides of the slot 2. The latch slides above the sliding surface 1 and the sliding surface 2 so that the locking boss 1 and the locking boss 2 respectively abut against the surface of the locking disc.

[0011] Furthermore, the first recess is provided with an inclined surface one near the spray nozzle in the nozzle, the second recess is provided with an inclined surface two near the spray nozzle in the nozzle, the second locking boss is provided with an inclined surface three with the same inclination as the inclined surface one, and the first locking boss is provided with an inclined surface four with the same inclination as the inclined surface two.

[0012] Furthermore, the first locking boss is adjacent to the left housing, the second locking boss is adjacent to the right housing, and the distance between the first and second slots is adapted to the outer width of the latch.

[0013] Furthermore, the latch has a ring-shaped structure with rounded ends and a flat portion adjacent to slot one or slot two.

[0014] Furthermore, a locking boss three is provided on the inner arc wall of one end of the latch, and the locking boss three has an inclined surface five that is the same as the inclined surface one and the inclined surface two.

[0015] Furthermore, the right housing has a first sliding surface with a first limiting boss, and the left housing has a second sliding surface with a second limiting boss. The first limiting boss and the second limiting boss are symmetrical to each other.

[0016] Furthermore, the inner arc surface of the latch is provided with a pushing plane that is symmetrical to the three sides of the locking boss, and the pushing plane abuts against one end of the return spring.

[0017] Furthermore, the pump head also includes a suction port and a mounting base, the mounting base having a mounting hole, and the other end of the return spring being located within the mounting hole.

[0018] The beneficial effects of this utility model are:

[0019] This invention features three locking bosses inside the latch: a locking boss 1, a locking boss 2, and a locking boss 3. The locking plate of the nozzle assembly has corresponding recesses 1 and 2 on the locking bosses 1 and 2. During the installation of the nozzle assembly into the pump head, inclined surfaces 1 and 2 on the locking plate push inclined surfaces 4 and 3 on the locking bosses 1 and 2 of the latch to slide outwards towards the right and left housings, facilitating the smooth installation of the nozzle assembly. Simultaneously, the latch automatically resets under the action of the return spring, locking the nozzle assembly. The locking plate is positioned below the locking bosses 1, 2, and 3, making installation simple and disassembly convenient. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the nozzle assembly of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the latch of this utility model;

[0023] Figure 4 This is a schematic diagram of the pump head structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the working state of this utility model when it is locked.

[0025] Reference numerals: 1-Right housing, 11-Slot 1, 12-Sliding surface 1, 121-Limiting boss 1, 2-Left housing, 21-Slot 2, 22-Sliding surface 2, 221-Limiting boss 2, 3-Nozzle assembly, 31-Locking disc, 32-Notch 1, 321-Inclined surface 1, 33-Notch 2, 331-Inclined surface 2, 4-Lock, 41-Locking boss 1, 411-Inclined surface 4, 42-Locking boss 2, 421-Inclined surface 3, 43-Locking boss 3, 431-Inclined surface 5, 44-Pushing plane, 5-Pump head, 51-Suction port, 52-Spray port, 53-Mounting base, 531-Mounting hole, 6-Reset spring. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0027] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Example 1

[0030] Embodiment 1 of this utility model is an automatic locking device for a nozzle assembly 3 in a pulse flushing gun, including a right housing 1 and a left housing 2 assembled together, a pump head 5 located inside the right housing 1 and the left housing 2, a nozzle assembly 3 detachably connected to the pump head 5, and a return spring 6. The ends of the right housing 1 and the left housing 2 extend outward symmetrically to form a first groove 11 and a second groove 21, respectively. An automatically sliding latch 4 is provided between the first groove 11 and the second groove 21. The latch 4 abuts against the locking disc 31 at the end of the nozzle assembly 3 for locking.

[0031] Reference Figure 1 When the nozzle assembly 3 is installed towards the pump head 5, the locking disc 31 at the installation location of the nozzle assembly 3 is located inside the latch 4. The contact area between the two drives the latch 4 to slide automatically to the outside of the right housing 1 and the left housing 2. The inner wall of the latch 4 contacts the return spring 6 provided at the pump head 5, so that the latch 4 is in the initial state. When the locking disc 31 of the nozzle assembly 3 is lower than the locking boss 41 and the locking boss 42 of the latch 4, the latch 4 automatically returns to the initial state under the action of the return spring 6, that is, it slides away from the outside of the right housing 1 and the left housing 2, and is in the locked state. Thus, the automatic locking of the locking device is realized. The operation is convenient and there is no need to push the latch 4 before installation and after installation to realize the installation and locking of the nozzle assembly 3.

[0032] In some preferred embodiments, the locking disc 31 is located inside the latch 4. The locking disc 31 has a first recess 32 and a second recess 33 on its two sides. The inner wall of the latch 4 has a first locking boss 41 and a second locking boss 42 that correspond one-to-one with the first recess 32 and the second recess 33, respectively. The width of the first recess 32 and the second recess 33 is greater than the width of the first locking boss 41 and the second locking boss 42, respectively.

[0033] The outer dimensions of the locking disc 31 are smaller than the open space of the latch 4. The dimensions of the first recess 32 and the second recess 33 are set to facilitate the installation of the nozzle assembly 3 into the pump head 5. The locking disc 31 of the nozzle assembly 3 can pass through the locking boss 41 and the second locking boss 42 of the latch 4, so that the locking disc 31 of the nozzle assembly 3 is located inside the locking boss 41 and the second locking boss 42 of the latch 4 to lock the nozzle assembly 3. (Refer to...) Figure 2 and Figure 3 .

[0034] In order to enable the latch 4 to slide smoothly on the end faces of the right housing 1 and the left housing 2, the right housing 1 is provided with sliding surfaces 12 on both sides of the slot 11, and the left housing 2 is provided with sliding surfaces 22 on both sides of the slot 21. The latch 4 slides above the sliding surfaces 12 and 22 so that the locking boss 41 and the locking boss 42 abut against the surface of the locking disc 31 respectively.

[0035] In some preferred embodiments, the first recess 32 is provided with an inclined surface 321 near the spray nozzle 52 in the nozzle, the second recess 33 is provided with an inclined surface 331 near the spray nozzle 52 in the nozzle, the second locking boss 42 is provided with an inclined surface 321 with the same inclination as the first inclined surface 321, and the first locking boss 41 is provided with an inclined surface 411 with the same inclination as the second inclined surface 331.

[0036] Specifically, when the nozzle assembly 3 is installed towards the pump head 5, the first inclined surface 321 and the second inclined surface 331 of the nozzle assembly 3 press against the third inclined surface 421 and the fourth inclined surface 411 of the latch 4, respectively, causing the latch 4 to slide automatically to the outside of the right housing 1 and the left housing 2, thereby realizing the automatic sliding of the latch 4, and resetting to the locked state under the action of the return spring 6.

[0037] In some preferred embodiments, the locking boss 41 is adjacent to the left housing 2, and the locking boss 42 is adjacent to the right housing 1. The distance between the first slot 11 and the second slot 21 is adapted to the outer width of the latch 4. This allows the latch 4 to slide smoothly between the first slot 11 and the second slot 21, while preventing the latch 4 from falling off towards the spray nozzle 52 of the pump head 5, thus improving the installation stability of the latch 4.

[0038] Example 2

[0039] This embodiment 2 is implemented based on embodiment 1. The latch 4 has a ring-shaped structure with arc ends and a flat surface adjacent to the first slot 11 or the second slot 21. The distance between these two flat surfaces matches the distance between the first slot 11 on the right housing 1 and the second slot 21 on the left housing 2, mainly for the latch 4 to slide between these flat surfaces. The inner sides of its two ends are arc surfaces, providing the conditions for setting the locking boss 3 43 and the pushing plane 44.

[0040] Meanwhile, a locking boss 3 43 is provided on the inner arc wall of one end of the latch 4. The locking boss 3 43 has an inclined surface 5 431 that is the same as the inclined surface 1 321 and inclined surface 2 331. When the nozzle assembly 3 is installed in the pump head 5, the locking plate 31 is lower than the locking boss 1 41 and locking boss 2 42 of the latch 4 and abuts against each other. At the same time, the latch 4 automatically returns to its initial position, that is, the locked position, under the action of the return spring 6. At this time, the locking boss 3 43 of the latch 4 cooperates with the locking boss 1 41 and locking boss 2 42 to block the locking plate 31 of the nozzle assembly 3, so that the nozzle assembly 3 is locked securely.

[0041] In some preferred embodiments, the right housing 1 has a limiting boss 121 on its sliding surface 12, and the left housing 2 has a limiting boss 221 on its sliding surface 22. The limiting bosses 121 and 221 are symmetrical to each other. The limiting bosses 121 and 221 are mainly used to control the initial position of the latch 4 and restrict the latch 4 from sliding inwards on the sliding surfaces 12 and 22 under the elastic action of the return spring 6.

[0042] Example 3

[0043] This embodiment 3 is implemented based on embodiment 1. The inner arc surface of the latch 4 is provided with a pushing plane 44 that is symmetrical to the locking boss 43. The pushing plane 44 abuts against one end of the return spring 6. The pump head 5 also includes a suction port 51 and a mounting base 53. The mounting base 53 is provided with a mounting hole 531, and the other end of the return spring 6 is located in the mounting hole 531.

[0044] Specifically, refer to Figure 1 and Figure 4 One end of the return spring 6 is located in the mounting hole 531 of the mounting base 53, which is used to install and fix the return spring 6; the other end is in contact with the pushing plane 44 of the latch 4, so that the latch 4 is in the initial position or the locked position under the action of the return spring 6.

[0045] The nozzle assembly 3 and the locking process of this utility model are as follows:

[0046] 1) When the nozzle assembly 3 is not installed in the pump head 5, the latch 4 is subjected to force on the inner side of the right housing 1 and the left housing 2 under the action of the return spring 6. At the same time, the inner side of the latch 4 contacts the upper limit boss of the right housing 1 and the upper limit boss of the left housing 2 in the direction close to the outer side of the right housing 1 and the left housing 2, so that the latch 4 is in the initial position. Refer to Figure 5 A.

[0047] 2) Install the nozzle assembly 3 into the pump head 5. When the first inclined surface 321 and the second inclined surface 331 of the nozzle assembly 3 just come into contact with the third inclined surface 421 and the fourth inclined surface 411 of the locking buckle 4, the locking buckle 4 is still in its initial position. Refer to... Figure 5 B.

[0048] 3) As the nozzle assembly 3 continues to be inserted towards the pump head 5, the inclined surface 321 and inclined surface 331 of the nozzle assembly 3 press against the inclined surface 421 and inclined surface 411 of the latch 4, respectively, causing the latch 4 to slide automatically to the outside of the right housing 1 and the left housing 2, as shown in the reference. Figure 5 C.

[0049] 4) When the nozzle assembly 3 is installed in the direction of the pump head 5, the locking disc 31 of the nozzle assembly 3 is lower than the locking boss 41 and locking boss 42 of the latch 4. The latch 4 automatically returns to its initial position, which is the locked position, under the action of the return spring 6. At this time, the locking boss 41, locking boss 42 and locking boss 43 of the latch 4 block the locking disc 31 of the nozzle assembly 3, thereby locking the nozzle assembly 3. (Refer to...) Figure 5 D.

[0050] 5) When it is necessary to remove or replace the nozzle assembly 3, simply push the latch 4 outwards towards the right housing 1 and the left housing 2 to remove the nozzle assembly 3. Refer to [reference needed]. Figure 5 E.

[0051] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments based on the technical essence of the present utility model and within the spirit and principles of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. An automatic locking device for a nozzle assembly in a pulse flushing gun, characterized in that, The device includes a right housing (1) and a left housing (2) assembled together, a pump head (5) located inside the right housing (1) and the left housing (2), a nozzle assembly (3) detachably connected to the pump head (5), and a return spring (6). The ends of the right housing (1) and the left housing (2) extend outward symmetrically to form a first slot (11) and a second slot (21), respectively. An automatic sliding latch (4) is provided between the first slot (11) and the second slot (21). The latch (4) abuts against the locking disc (31) at the end of the nozzle assembly (3) for locking.

2. The automatic locking device for the nozzle assembly in a pulse flushing gun according to claim 1, characterized in that, The locking disc (31) is located inside the latch (4). The locking disc (31) has a first recess (32) and a second recess (33) on its two sides respectively. The inner wall of the latch (4) has a locking boss (41) and a locking boss (42) that correspond one-to-one with the first recess (32) and the second recess (33) respectively. The width of the first recess (32) and the second recess (33) is greater than the width of the first locking boss (41) and the second locking boss (42) respectively.

3. An automatic locking device for a nozzle assembly in a pulse flushing gun according to claim 2, characterized in that, The right housing (1) has a sliding surface (12) on both sides of the slot (11) adjacent to the locking surface (4) for sliding, and the left housing (2) has a sliding surface (22) on both sides of the slot (21) adjacent to the locking surface (4) for sliding. The locking surface (4) slides above the sliding surface (12) and the sliding surface (22) so that the locking boss (41) and the locking boss (42) abut against the surface of the locking disc (31) respectively.

4. An automatic locking device for a nozzle assembly in a pulse flushing gun according to claim 2, characterized in that, The first recess (32) is provided with an inclined surface (321) near the spray nozzle (52) in the nozzle, the second recess (33) is provided with an inclined surface (331) near the spray nozzle (52) in the nozzle, the second locking boss (42) is provided with an inclined surface (421) with the same inclination as the first inclined surface (321), and the first locking boss (41) is provided with an inclined surface (411) with the same inclination as the second inclined surface (331).

5. An automatic locking device for a nozzle assembly in a pulse flushing gun according to claim 2, characterized in that, The locking boss one (41) is adjacent to the left housing (2), the locking boss two (42) is adjacent to the right housing (1), and the distance between the slot one (11) and the slot two (21) is adapted to the outer width of the latch (4).

6. An automatic locking device for a nozzle assembly in a pulse flushing gun according to claim 2, characterized in that, The latch (4) has a ring-shaped structure with rounded ends and a flat surface near the first slot (11) or the second slot (21).

7. An automatic locking device for a nozzle assembly in a pulse flushing gun according to claim 6, characterized in that, The inner wall of the circular arc at one end of the latch (4) is provided with a locking boss three (43), and the locking boss three (43) has an inclined surface five (431) that is the same as the inclined surface one (321) and the inclined surface two (331).

8. An automatic locking device for a nozzle assembly in a pulse flushing gun according to claim 6, characterized in that, The right shell (1) has a sliding surface 1 (12) with a limiting boss 1 (121) and the left shell (2) has a sliding surface 2 (22) with a limiting boss 2 (221). The limiting boss 1 (121) and the limiting boss 2 (221) are symmetrical to each other.

9. An automatic locking device for a nozzle assembly in a pulse flushing gun according to claim 6, characterized in that, The inner arc surface of the latch (4) is provided with a pushing plane (44) that is symmetrical to the locking boss (43), and the pushing plane (44) abuts against one end of the return spring (6).

10. An automatic locking device for a nozzle assembly in a pulse flushing gun according to claim 9, characterized in that, The pump head (5) also includes a suction port (51) and a mounting base (53). The mounting base (53) is provided with a mounting hole (531), and the other end of the reset spring (6) is located in the mounting hole (531).

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