A hand-pressing type powder sprayer

Abstract

The utility model discloses a manual press formula powder sprayer, including main casing, press portion and switch spare, wherein the inside of main casing is equipped with the first accommodating cavity and second accommodating cavity of not intercommunication, and the first accommodating cavity is equipped with extension protruding, and the one end of extension protruding is equipped with air inlet part, and the other end is equipped with the air outlet hole of intercommunication with second accommodating cavity, and air inlet part is equipped with the through -hole, and the side of main casing is equipped with the first air inlet hole of intercommunication with first accommodating cavity, and the outside wall of the lower half of press portion forms the communicating groove with the lateral wall of first accommodating cavity, and the switch spare is by soft material constitutes, and the one end of switch spare is located in the air outlet hole to cover air outlet hole, and the other end of switch spare is located on air inlet part to cover through -hole. Through above -mentioned mode, the utility model discloses by the switch spare of soft material constitutes as the closing drive part of the air inlet hole and air outlet hole of powder spraying structure, makes powder spraying structure not need metal material, can let the powder of accommodating jar body not easy to be contaminated, guarantees the quality of product.

Description

Technical Field

[0001] This utility model relates to the field of hair grooming tools, specifically a manual press-type powder sprayer. Background Technology

[0002] Hair thickening fibers first appeared in 1990 and entered practical use in 2005. Hair thickening fibers are mainly used by people suffering from large-area hair loss or thinning hair. They can make the user's balding or thinning hair appear thicker in 30 seconds, greatly solving the problem of hair loss.

[0003] Currently, a type of manual powder sprayer is popular on the market, which sprays hair thickening fibers onto areas of sparse hair on the scalp. However, these manual powder sprayers contain metal components, such as beads that are compressed by springs to seal the air inlet and outlet. The powder passes through these metal components before being sprayed out, thus preventing it from being contaminated by the external environment. However, since these beads and springs are mostly made of metal, they will rust and oxidize over time, which can easily accelerate the aging of the hair thickening fibers, contaminate the powder, and seriously affect the quality of the product. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a manually operated press-type powder sprayer that can solve the aforementioned technical problems.

[0006] (II) Technical Solution

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a manually operated press-type powder sprayer, characterized in that it includes: a main housing for connecting to a receiving tank, having a receiving through hole inside, wherein a partition is provided in the receiving through hole to divide the receiving through hole into a first receiving cavity and a second receiving cavity that are not connected, the first receiving cavity being located above the second receiving cavity, the bottom wall of the first receiving cavity having an extending protrusion, the extending protrusion having a first receiving groove, one end of the first receiving groove having an air inlet, the air inlet having a flow hole, the bottom wall of the other end of the first receiving groove having an air outlet communicating with the second receiving cavity, the side wall of the extending protrusion having a side wall opening communicating with the flow hole, one side wall of the main housing having a first air inlet communicating with the first receiving cavity, the main housing... The other side wall is provided with a powder spraying port communicating with the second receiving cavity; the pressing part is made of soft material and has an air storage space inside, wherein the lower half of the pressing part is disposed on the first receiving cavity, the lower half of the pressing part is provided with a first communicating opening communicating with the first receiving groove, and the outer side wall of the lower half of the pressing part and the side wall of the first receiving cavity form a communicating groove that communicates the first air inlet and the side wall opening; the switch is located in the first receiving groove, wherein one end of the switch is disposed in the air outlet to cover the air outlet, and the other end of the switch is disposed on the air inlet to cover the flow hole; wherein the switch is made of soft material, such that when the pressing part is pressed, one end of the switch does not cover the air outlet, and when the pressing part is not pressed, the other end of the switch does not cover the flow hole.

[0008] Preferably, the first receiving groove is provided with a first baffle and a second baffle at intervals, so that the first receiving groove is divided into a first retaining groove, a flow groove and a second retaining groove by the first baffle and the second baffle, wherein the air inlet is provided at one end of the flow groove, the air outlet is provided at the bottom wall of the other end of the flow groove, and the switch is provided on the flow groove.

[0009] Preferably, the switch includes a cover plate and a mounting portion connected to the cover plate. The cover plate is disposed on the air inlet and the mounting portion is disposed at the other end of the flow channel. Both the cover plate and the mounting portion are rectangular, and the two ends of the connection between the cover plate and the mounting portion are provided with cutouts.

[0010] Preferably, the top surface of the air intake is rectangular, the top end of the other end of the flow channel is rectangular, the length and width of the cover plate are equal to the length and width of the top surface of the air intake, the length and width of the mounting part are equal to the length and width of the top end of the other end of the flow channel, wherein the bottom end of the mounting part extends downward to provide an extension, the mounting part is provided with a through hole passing through the mounting part and the extension, and the bottom end of the extension is provided with a deformable sealing plate for covering the through hole.

[0011] Preferably, the through hole is cylindrical and the sealing plate is circular, wherein the outer diameter of the sealing plate is larger than the diameter of the through hole, the sealing plate is disposed horizontally on the bottom surface of the extension, and one end of the sealing plate is fixedly disposed outside the through hole on the bottom surface of the extension, and a slit is formed between the other end of the sealing plate and the bottom surface of the extension.

[0012] Preferably, the top surface of the upper half of the pressing part is provided with a pressing friction area, and the bottom surface of the lower half of the pressing part is recessed to form a second receiving groove. The first communicating opening is provided on the bottom wall of the second receiving groove, wherein the extending protrusion is provided in the second receiving groove.

[0013] Preferably, the second receiving groove is cylindrical, the first communicating opening is circular, and the extending protrusion is cylindrical, wherein the outer diameter of the extending protrusion is equal to the aperture of the second receiving groove, and the aperture of the first communicating opening is smaller than the outer diameter of the extending protrusion.

[0014] Preferably, the manual press-type powder sprayer further includes: a fixed housing disposed within the air storage space of the pressing part, wherein the bottom surface of the fixed housing is recessed to form a third receiving groove, the extended protrusion is disposed within the third receiving groove, the bottom wall of the third receiving groove is provided with a second communicating opening corresponding to the first communicating opening, and the bottom wall of the third receiving groove is provided with a first insertion part and a second insertion part on both sides of the second communicating opening at intervals, wherein the first insertion part is inserted into the first locking groove, and the second insertion part is inserted into the second locking groove.

[0015] Preferably, the main housing and the fixed housing are made of ABS material, and the pressing part and the switching part are made of silicone material.

[0016] Preferably, it also includes a receiving tank, wherein the outer wall of the top of the receiving tank is provided with an external thread, and the inner wall of the second receiving cavity of the main housing is provided with an internal thread for threaded connection with the external thread.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model provides a manually operated press-type powder sprayer with the following advantages: When the pressing part of the manually operated press-type powder sprayer is pressed, the gas in the gas storage space of the pressing part forces open the switch to cover one end of the air outlet, allowing gas to enter the receiving tank, thereby spraying the powder in the receiving tank out of the spray nozzle. When the pressed part is released, one end of the switch will spring back and cover the air outlet again, allowing external gas to enter the extended protrusion through the first air inlet and the connecting groove. In the side opening, the gas will push open the other end of the soft material switch, allowing the gas to enter the gas storage space of the pressing part. After the gas intake is completed, the other end of the switch will cover the flow hole again, thus completing the powder spraying by pressing the pressing part. Since this powder spraying structure is made of soft materials such as silicone and plastic, the closure of the air inlet and outlet of the powder spraying structure is driven by the soft material switch, so that the entire powder spraying structure does not require metal materials, thereby preventing the powder in the container from being contaminated and ensuring the quality of the product. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the manual press-type powder sprayer of this utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure of the central containment tank;

[0021] Figure 3 for Figure 1 A partial structural diagram of the powder spraying structure;

[0022] Figure 4 for Figure 3 A cross-sectional schematic diagram of the powder spraying structure;

[0023] Figure 5 for Figure 1 A schematic diagram of the second partial structure of the powder spraying structure;

[0024] Figure 6 for Figure 1 A schematic diagram of the third part of the powder spraying structure;

[0025] Figure 7 for Figure 1 A three-dimensional structural diagram of the main shell.

[0026] Figure 8 for Figure 7 A schematic diagram of the cross-sectional structure of the main shell.

[0027] Figure 9 for Figure 1 A three-dimensional structural diagram of the central pressing part;

[0028] Figure 10 for Figure 1 A schematic diagram of the first structure of the fixed shell in the middle;

[0029] Figure 11 for Figure 1 A schematic diagram of the second structure of the fixed housing;

[0030] Figure 12 for Figure 1 First structural schematic diagram of the switch component;

[0031] Figure 13 for Figure 1 A schematic diagram of the second structure of the switching device. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] like Figure 1-13 As shown, this utility model discloses a manual press-type powder sprayer, which includes a main housing 1, a pressing part 2, and a switch 3.

[0034] The main housing 1 is used to connect with the receiving tank 5. The main housing 1 is provided with a receiving through hole, in which a partition is provided, thereby dividing the receiving through hole into a first receiving cavity 11 and a second receiving cavity 12 that are not connected by the partition, and the first receiving cavity 11 is located above the second receiving cavity 12.

[0035] In this embodiment, the bottom wall of the first receiving cavity 11 is provided with an extension protrusion 13, the extension protrusion 13 is provided with a first receiving groove, one end of the first receiving groove is provided with an air inlet 131, the air inlet 131 is provided with a flow hole 132, the bottom wall of the other end of the first receiving groove is provided with an air outlet 133 communicating with the second receiving cavity 12, the side wall of the extension protrusion 13 is provided with a side wall opening 134 communicating with the flow hole 132, one side wall of the main housing 1 is provided with a first air inlet 14 communicating with the first receiving cavity 11, and the other side wall of the main housing 1 is provided with a powder spraying port 15 communicating with the second receiving cavity 12.

[0036] Preferably, the pressing part 2 is made of a soft material and has an air storage space inside. The lower half of the pressing part 2 is disposed on the first receiving cavity 11. The lower half of the pressing part 2 has a first connecting opening 21 that communicates with the first receiving groove. The outer side wall of the lower half of the pressing part 2 and the side wall of the first receiving cavity 11 form a connecting groove 22 that connects the first air inlet 14 and the side wall opening 134. It is worth noting that the connecting groove 22 only leads to the first air inlet 14 and the side wall opening 134, and there are no other components connected in between, which prevents the gas from being misdirected.

[0037] It should be understood that the top surface of the pressing part 2 is hemispherical.

[0038] The switch 3 is located in the first receiving groove of the extended protrusion 13, wherein one end of the switch 3 is disposed in the air outlet 133 to cover the air outlet 133, and the other end of the switch 3 is disposed on the air inlet 131 to cover the flow hole 132.

[0039] In this embodiment, the switch 3 is made of a soft material, so that when the pressing part 2 is pressed, one end of the switch 3 does not cover the air outlet 133, and when the pressing part 2 is not pressed, the other end of the switch 3 does not cover the flow hole 132.

[0040] It is understandable that when the pressing part 2 is pressed, the gas in the gas storage space inside the pressing part 2 will be pressed down and push open one end of the switch 3, so that one end of the switch 3 will not temporarily cover the vent 133, allowing the gas to enter the receiving tank and spray out the powder through the powder spraying port 15 of the second receiving cavity 12. At the same time, the other end of the switch 3 will seal the flow hole 132 of the air inlet 131. When the pressed part 2 is released, the gas storage space inside the pressing part 2 will generate suction (the gas storage space will increase from small to large), so that one end of the switch 3 will be reopened under the action of this suction. The air outlet 133 is covered, and the outside air will also enter the side wall opening 134 of the extension protrusion 13 from the first air inlet 14 along the connecting groove 22 under the action of this suction. The other end of the switch 3, which is covered on the flow hole 132, will be opened under the dual action of the suction generated by the air storage space and the air entering from the outside (that is, the flow hole 132 is not covered), so that the gas in the air storage space in the pressing part 2 can be replenished. After the replenishment is completed, the other end of the switch 3 will be covered on the flow hole 132 again. This cycle is repeated to continuously spray powder.

[0041] In this embodiment, a first baffle and a second baffle are spaced apart in the first receiving groove to divide the first receiving groove into a first retaining groove 135, a flow groove 137, and a second retaining groove 136. An air inlet 131 is located at one end of the flow groove 137, and an air outlet 133 is located on the bottom wall of the other end of the flow groove 137. A switch 3 is disposed on and covers the flow groove 137. It should be understood that the air inlet 131 is located on the side near the first air inlet 14, while the air outlet 133 is located on the side of the air inlet 131 away from the first air inlet 14.

[0042] In this embodiment, the switch 3 includes a cover plate 31 and a mounting portion 32 connected to the cover plate 31. The cover plate 31 is disposed on the air inlet 131, and the mounting portion 32 is disposed at the other end of the flow channel 137. It should be understood that the cover plate 31 and the mounting portion 32 are integrally formed. The cover plate 31 is used to seal the flow hole 132 of the air inlet 131, and the mounting portion 32 is used to seal the air outlet 133. That is, the connection and disconnection between the first receiving cavity and the air outlet 133 are controlled by the mounting portion 32.

[0043] Preferably, both the cover plate 31 and the mounting part 32 are rectangular, and the two ends of the connection between the cover plate 31 and the mounting part 32 are provided with a notch 30. It should be understood that the switch 3 is composed of two parts: the cover plate 31 and the mounting part 32. The mounting part 32 is recessed relative to the cover plate 31 and is embedded at the other end of the flow groove 137. Therefore, when the cover plate 31 is pushed open by the external gas, allowing the flow hole 132 to connect with the gas storage space of the pressing part 2, the switch 3 will not detach from the flow groove 137. This means that after the cover plate 31 loses the pushing force of the external air, it will cover the flow hole 132 again, preventing the flow hole 132 from connecting with the gas storage space of the pressing part 2.

[0044] Preferably, the top surface of the air intake 131 is rectangular, the top end of the other end of the flow channel 137 is rectangular, the length and width of the cover plate 31 are equal to the length and width of the top surface of the air intake 131, and the length and width of the mounting part 32 are equal to the length and width of the top end of the other end of the flow channel 137. It should be understood that an adhesive layer, such as an adhesive layer, may be provided between the side wall end of the mounting part 32 and the side wall end of the other end of the flow channel 137, so that the mounting part 32 is fixedly mounted in the other end of the flow channel 137 by the adhesive layer.

[0045] Furthermore, the bottom end of the mounting portion 32 extends downward to form an extension portion 321. The mounting portion 32 has a through hole 322 passing through both the mounting portion 32 and the extension portion 321, and the bottom end of the extension portion 321 has a deformable sealing plate 323 for covering the through hole 322. It should be understood that the sealing plate 323 is deformable under pressure, such as rotation. Therefore, when the sealing plate 323 deforms, the through hole 322 can communicate with the vent 133, and when the sealing plate 323 does not deform, the through hole 322 is not connected to the vent 133.

[0046] Preferably, the length and width of the extension 321 are both smaller than the length and width of the mounting portion 32.

[0047] Furthermore, the through hole 322 is cylindrical, and the sealing plate 323 is circular. The outer diameter of the sealing plate 323 is larger than the diameter of the through hole 322. The sealing plate 323 is horizontally disposed on the bottom surface of the extension 321, and one end of the sealing plate 323 is fixedly disposed outside the through hole 322 on the bottom surface of the extension 321. The other end of the sealing plate 323 forms a gap with the bottom surface of the extension 321 (they are in close contact). It should be understood that the sealing plate 323 will rotate downward when compressed by gas, that is, it will open towards the vent 133 when it is pushed open by gas, so that the through hole 322 can communicate with the vent 133, thereby allowing gas to enter the containment tank. When there is no pressure, it will automatically reset to cover the through hole 322, so that the through hole 322 and the vent 133 are not connected. Of course, there will be a small gap between the other end of the sealing plate 323 and the bottom surface of the extension 321, but it does not affect the connection.

[0048] It is understandable that when the pressing part 2 is pressed, the gas in the gas storage space will be squeezed and rushed towards the sealing plate 323. Since there is a gap between the other end of the sealing plate 323 and the bottom surface of the extension 321, the gas can push the sealing plate 323 to one side. Of course, since the cover plate 31 is covering the flow hole 132, the cover plate 31 will not be affected.

[0049] In this embodiment, the top surface of the upper half of the pressing part 2 is provided with a pressing friction area 23, and the bottom surface of the lower half of the pressing part 2 is recessed to form a second receiving groove 24. The first connecting opening 21 is provided on the bottom wall of the second receiving groove 24, and the extending protrusion 13 is provided in the second receiving groove 24.

[0050] Preferably, the second receiving groove 24 is cylindrical, the first connecting opening 21 is circular, and the extending protrusion 13 is cylindrical, wherein the outer diameter of the extending protrusion 13 is equal to the aperture of the second receiving groove 24, and the aperture of the first connecting opening 21 is smaller than the outer diameter of the extending protrusion 13. That is to say, the extending protrusion 13 is actually just stuck in the second receiving groove 24, and the fact that the aperture of the first connecting opening 21 is smaller than the outer diameter of the extending protrusion 13 allows the gas in the gas storage space of the extrusion section 2 to be delivered to the extending protrusion 13, thereby allowing the gas to enter the interior of the receiving container.

[0051] Furthermore, the manual press-type powder sprayer also includes a fixed housing 4, which is disposed within the air storage space of the pressing part 2. The bottom surface of the fixed housing 4 has a recessed third receiving groove 41, and an extension protrusion 13 is disposed within the third receiving groove 41. The bottom wall of the third receiving groove 41 has a second connecting opening 42 corresponding to the first connecting opening 21. The bottom wall of the third receiving groove 41 has a first insertion part 43 and a second insertion part 44 spaced apart on both sides of the second connecting opening 42. The first insertion part 43 is inserted into a first locking groove 135, and the second insertion part 44 is inserted into a second locking groove 136. It should be understood that the first insertion part 43 of the fixed housing 4 is inserted into the first locking groove 135, and the second insertion part 44 is inserted into the second locking groove 136. This is equivalent to the fixed housing 4 connecting the main housing 1 and the pressing part 2 in series through the two insertion parts, thereby enabling the powder spraying structure to have a certain supporting force when the pressing part 2 is pressed.

[0052] In this embodiment, the main housing 1 and the fixed housing 4 are made of ABS material, and the pressing part 2 and the switching part 3 are made of silicone material. It should be understood that neither the plastic material (ABS material) nor the silicone material will contaminate the powder (hair thickening fiber) or cause the powder to agglomerate due to static electricity and become unable to be sprayed when in contact with the powder.

[0053] Furthermore, the manual press-type powder sprayer also includes a receiving tank 5, wherein the outer wall of the top of the receiving tank 5 is provided with an external thread 51, and the inner wall of the second receiving cavity 12 of the main housing 1 is provided with an internal thread 16 for threaded connection with the external thread 51, so that the main housing 1 and the receiving tank 5 are detachably connected. It should be understood that when the pressing part 2 is pressed, the gas in the gas storage space of the pressing part 2 will break through the sealing plate 323 and enter the receiving tank 5 through the air outlet 133, and the powder in the receiving tank 5 will be carried to the powder spraying nozzle 15 on the side wall of the second receiving cavity 12 and sprayed out. After the powder in the receiving tank 5 is used up, it can be removed from the main housing 1 and refilled with powder.

[0054] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A hand-press powder sprayer characterized by, include: The main housing, for connection with the receiving tank, has a receiving through hole inside. A partition is provided in the receiving through hole to divide it into a first receiving cavity and a second receiving cavity that are not connected. The first receiving cavity is located above the second receiving cavity. The bottom wall of the first receiving cavity has an extending protrusion, and the extending protrusion has a first receiving groove. One end of the first receiving groove has an air inlet with a flow hole. The bottom wall of the other end of the first receiving groove has an air outlet communicating with the second receiving cavity. The side wall of the extending protrusion has a side wall opening communicating with the flow hole. One side wall of the main housing has a first air inlet communicating with the first receiving cavity, and the other side wall of the main housing has a powder spraying port communicating with the second receiving cavity. The pressing part is made of soft material and has an internal air storage space. The lower half of the pressing part is disposed on the first receiving cavity. The lower half of the pressing part has a first communicating opening that communicates with the first receiving groove. The outer side wall of the lower half of the pressing part and the side wall of the first receiving cavity form a communicating groove that connects the first air inlet and the side wall opening. A switch element is located in the first receiving groove, wherein one end of the switch element is disposed in the air outlet to cover the air outlet, and the other end of the switch element is disposed on the air inlet to cover the flow hole; The switch is made of a soft material, such that when the pressing part is pressed, one end of the switch does not cover the air outlet, and when the pressing part is not pressed, the other end of the switch does not cover the flow hole.

2. The manual pressurized duster according to claim 1, characterized in that The first receiving groove is provided with a first baffle and a second baffle at intervals, so that the first receiving groove is divided into a first retaining groove, a flow groove and a second retaining groove by the first baffle and the second baffle. The air inlet is provided at one end of the flow groove, the air outlet is provided on the bottom wall of the other end of the flow groove, and the switch is provided on the flow groove.

3. The manual pressurized duster according to claim 2, characterized in that The switch includes a cover plate and a mounting part connected to the cover plate. The cover plate is disposed on the air inlet and the mounting part is disposed at the other end of the flow channel. Both the cover plate and the mounting part are rectangular, and the two ends of the connection between the cover plate and the mounting part are provided with cutouts.

4. The manual pressurized duster according to claim 3, wherein The top surface of the air intake is rectangular, the top end of the other end of the flow channel is rectangular, the length and width of the cover plate are equal to the length and width of the top surface of the air intake, the length and width of the mounting part are equal to the length and width of the top end of the other end of the flow channel, wherein the bottom end of the mounting part extends downward to provide an extension, the mounting part is provided with a through hole passing through the mounting part and the extension, and the bottom end of the extension is provided with a deformable sealing plate for covering the through hole.

5. The manual pressurized duster according to claim 4, wherein The through hole is cylindrical, and the sealing plate is circular. The outer diameter of the sealing plate is larger than the diameter of the through hole. The sealing plate is arranged horizontally on the bottom surface of the extension, and one end of the sealing plate is fixed outside the through hole on the bottom surface of the extension. A slit is formed between the other end of the sealing plate and the bottom surface of the extension.

6. The manual press-type powder sprayer according to claim 2, characterized in that, The upper half of the pressing part has a pressing friction area on its top surface, and the lower half of the pressing part has a second receiving groove formed in the bottom surface. The first connecting opening is provided on the bottom wall of the second receiving groove, and the extending protrusion is provided in the second receiving groove.

7. The manual press-type powder sprayer according to claim 6, characterized in that, The second receiving groove is cylindrical, the first communicating opening is circular, and the extended protrusion is cylindrical, wherein the outer diameter of the extended protrusion is equal to the aperture of the second receiving groove, and the aperture of the first communicating opening is smaller than the outer diameter of the extended protrusion.

8. The manual press-type powder sprayer according to claim 7, characterized in that, Also includes: A fixed housing is disposed within the air storage space of the pressing part. The bottom surface of the fixed housing is recessed to form a third receiving groove. The extended protrusion is disposed within the third receiving groove. The bottom wall of the third receiving groove is provided with a second communicating opening corresponding to the first communicating opening. The bottom wall of the third receiving groove is provided with a first insertion part and a second insertion part on both sides of the second communicating opening at intervals. The first insertion part is inserted into the first locking groove, and the second insertion part is inserted into the second locking groove.

9. The manual press-type powder sprayer according to claim 8, characterized in that, The main housing and the fixed housing are made of ABS material, and the pressing part and the switching part are made of silicone material.

10. The manual press-type powder sprayer according to claim 1, characterized in that, It also includes a receiving tank, wherein the outer wall of the top of the receiving tank is provided with an external thread, and the inner wall of the second receiving cavity of the main housing is provided with an internal thread for threaded connection with the external thread.

Images