Nozzle and oral irrigator

Abstract

The invention discloses a nozzle and a water pick, the nozzle is detachably mounted on a spray rod of the water pick, the nozzle comprises a shell, and the shell defines a mounting cavity and a buffer cavity in fluid communication with the mounting cavity. The nozzle also includes at least one water spout in fluid communication with the cushion chamber. At least one flow channel is arranged on the inner wall of the water spraying opening and comprises a fluid inlet, a fluid outlet and a fluid channel communicating the fluid inlet with the fluid outlet, and the fluid channel spirally extends relative to the central axis of the water spraying opening. At least one spiral flow channel is arranged on the inner wall of the water spraying opening, fluid rotates at a high speed through a spiral structure on the periphery of the water spraying opening, the formed centrifugal force rolls away foreign matter in an oral cavity and mutually reflects with impulsive force generated in the center of the nozzle, and the effect of 1 + 1 > 2 is generated. Meanwhile, direct impact on the nozzle is reduced when the fluid rotates in the nozzle, and the service life of the nozzle is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning equipment, and in particular to a nozzle and a water flosser. Background Art

[0002] The water flosser uses high-pressure pulsed water to clean the gaps between teeth, gum margins, and periodontal pockets. Its basic working principle is as follows: the high-frequency water pump inside the device pressurizes the water to form a high-pressure water column or pulsed water flow; the pressurized water is ejected through the nozzle to form a high-speed water flow, which can reach a pressure of 30-160 PSI (pounds per square inch). The high-pressure water flow penetrates deep into the gaps between teeth and the gum sulcus, effectively removing food debris, dental plaque, and soft scale, and reducing bacterial growth. The pulsed water flow can also stimulate the gums, promote blood circulation, and help relieve gingivitis and gum bleeding.

[0003] In the prior art, in order to ensure that the water flow has high pressure, the diameter of the nozzle is generally relatively small; however, the water flow sprayed from a relatively small diameter is easy to cause damage to the oral cavity. Therefore, some manufacturers slightly reduce the pressure by increasing the number of nozzles, which can not only increase the flushing area but also avoid reducing oral injuries. However, this will slightly reduce the cleaning ability, especially for stubborn impurities. Summary of the invention

[0004] In view of the deficiencies existing in the above-mentioned technologies, the present invention provides a nozzle and a water flosser, which can adopt a nozzle with a spiral channel to increase the spraying area of ​​the nozzle and improve the cleaning ability.

[0005] In one aspect, the present invention provides a nozzle detachably mounted on a spray bar of a water flosser, comprising: The nozzle comprises a housing, the housing defining a mounting cavity and a buffer cavity in fluid communication with the mounting cavity; the nozzle further comprises at least one water spray port in fluid communication with the buffer cavity; Among them, the inner wall of the water spray outlet is provided with at least one flow channel, and the flow channel includes a fluid inlet, a fluid outlet, and a fluid channel connecting the fluid inlet and the fluid outlet, and the fluid channel extends in a spiral shape relative to the central axis of the water spray outlet.

[0006] Optionally, when there are multiple flow channels, the multiple flow channels are evenly distributed on the inner wall of the water spray port.

[0007] Optionally, the rotation angle between the fluid inlet and the fluid outlet of a single flow channel is greater than 90° and less than 180°.

[0008] Optionally, the depth of the fluid channel is less than half of the radius of the water jet.

[0009] On the other hand, the present application also provides a water flosser, wherein the nozzle is mounted on a spray rod of the water flosser.

[0010] Optionally, a first threaded structure is provided in the installation cavity, and the first threaded structure cooperates with a second threaded structure located on the spray rod to realize the installation / disassembly of the nozzle; wherein, when the water spray port of the nozzle is facing the user: the nozzle is rotated counterclockwise relative to the spray rod to install the nozzle to the spray rod, and the nozzle is rotated clockwise relative to the spray rod to remove the nozzle from the spray rod.

[0011] Optionally, the water flosser defines an outer shell having a receiving cavity, a cleaning liquid tank for receiving a cleaning liquid, and a nozzle, and is characterized in that it also includes a water pump assembly, wherein the water pump assembly is used to pump the cleaning liquid in the cleaning liquid tank to the area around the teeth through the nozzle; The oral irrigator further comprises a mounting bracket, which is mounted in the accommodating cavity; the mounting bracket comprises a first bracket and a second bracket, and the first bracket and the second bracket cooperate to fix the water pump assembly to the mounting bracket; Wherein, the mounting bracket is configured to be assembled to the outer shell after the water pump assembly is fixed to the mounting bracket.

[0012] Optionally, the water pump assembly includes a support frame, the support frame is provided with a driver, a transmission mechanism and a fluid distribution mechanism, and the driver drives the transmission structure to pump the fluid in the cleaning liquid tank to the nozzle.

[0013] Optionally, the nozzle is detachably mounted on the outer shell, a locking mechanism is provided between the outer shell and the first bracket, and the locking mechanism is configured to enable the nozzle to be in an unlocked state or a locked state relative to the outer shell.

[0014] Optionally, the locking mechanism includes a mounting member and a locking member, the mounting member is mounted on the first bracket, the locking member is mounted on the mounting member, and the locking member can move relative to the mounting member to achieve locking / unlocking.

[0015] The present invention provides a nozzle and a water flosser. The nozzle is detachably mounted on the spray rod of the water flosser. The nozzle includes a shell, which defines a mounting cavity and a buffer cavity in fluid communication with the mounting cavity. The nozzle also includes at least one water spray port in fluid communication with the buffer cavity. The inner wall of the water spray port is provided with at least one flow channel, the flow channel includes a fluid inlet, a fluid outlet, and a fluid channel connecting the fluid inlet and the fluid outlet, and the fluid channel extends in a spiral shape relative to the central axis of the water spray port. At least one spiral flow channel is provided on the inner wall of the water spray port, and the fluid rotates at high speed through the spiral structure around the water spray port. The centrifugal force formed sweeps away foreign matter in the oral cavity, and interacts with the impulse generated by the center of the nozzle, producing an effect of 1+1>2. At the same time, the rotation of the fluid inside the nozzle reduces the direct impact on the nozzle, thereby extending the service life of the nozzle. Furthermore, the high-speed rotation of the fluid through the spiral flow channel can form a conical spray, and the flushing distribution is uniform and large in area. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the oral irrigator in one embodiment of the present invention when it is in use; Figure 2 It is a structural schematic diagram of the oral irrigator in one embodiment of the present invention when it is in a storage state; Figure 3 is a cross-sectional view along the vertical direction of the water flosser; Figure 4 This is a schematic diagram of the structure of the water flosser after the outer shell is hidden; Figure 5 for Figure 3 A partial enlarged view of the area shown in middle A; Figure 6 This is a schematic diagram of the structure of a mounting bracket in one embodiment; Figure 7 It is a structural schematic diagram of the mounting bracket at another angle; Figure 8 This is a structural diagram of the mounting bracket at another angle; Fig. 9 This is a structural exploded view of a mounting bracket (with a water pump assembly and a battery pack installed) in one embodiment.

[0017] Fig.10 for Figure 3 A magnified view of the structure in the middle B area; Fig.11 It is a schematic diagram of the structure of the nozzle at an angle; Fig.12 It is a schematic diagram of the structure of the nozzle at another angle; Fig.13 is a cross-sectional view of a nozzle structure (including three flow channels) along its length direction in one embodiment; Fig.14 for Fig.13 A magnified view of the structure in the middle C region; Fig.15 is a front view (seen from the front of the nozzle) of an embodiment of the nozzle (including three flow channels); Fig.16 1 is a rear view (seen from the rear of the nozzle) of a nozzle (including three flow channels) in one embodiment.

[0018] Fig.17 is a cross-sectional view of a nozzle (including a flow channel) along its length direction in one embodiment; Fig.18 for Fig.17 A magnified view of the structure in the middle D region; Fig.19 A partial view of the front end of a nozzle (including a flow channel) in one embodiment; Fig. 20 A partial view of the front end of a nozzle (including two flow channels) in one embodiment. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that if a directional indication is involved in the embodiment of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0021] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0023] refer to Figure 1-9 , Figure 1 and 2 A water flosser 100 is disclosed, which includes an outer shell 1 defining a receiving cavity, a cleaning liquid tank 2 for receiving a cleaning liquid, and a nozzle 3. The water flosser 100 generally includes a use state (refer to Figure 1 ) and storage status (reference Figure 2 ), when the water flosser 100 is in use, most of the outer shell 1 is located outside the cleaning liquid tank 2, and the cleaning liquid tank 2 is used to contain the cleaning liquid. When the water flosser 100 is in the storage state, the outer shell 1 is stored in the cleaning liquid tank 2. The water flosser 100 includes a water pump assembly 4 and a mounting bracket 41 for mounting the water pump assembly 4. The water pump assembly 4 is used to pump the cleaning liquid in the cleaning liquid tank 2 to the surrounding area of ​​the teeth through the nozzle 3. The water pump assembly 4 includes a support frame 14 and a driver 15, a transmission mechanism 16 and a fluid distribution mechanism 17 arranged on the support frame 14, and the driver 15 drives the transmission structure to pump the fluid in the cleaning liquid tank 2 to the nozzle 3. The working principle of the water flosser 100 is a technology well known to those skilled in the art and will not be described in detail here. The present application mainly discloses a structure that is different from other water flossers 100.

[0024] refer to Figure 3-9 , the mounting bracket 41 and its related mounting method are introduced in detail, the mounting bracket 41 is installed in the accommodating cavity; the mounting bracket 41 includes a first bracket 42 and a second bracket 43, and the first bracket 42 and the second bracket 43 cooperate to fix the water pump assembly 4 to the mounting bracket 41. Figure 6-9, the first bracket 42 is arranged above the second bracket 43, and the two are fixedly connected. A first installation space 27 is defined between the first bracket 42 and the second bracket 43 for installing the water pump assembly 4, and the water pump assembly 4 can be fixed in the bracket. After the water pump assembly 4 is fixed to the mounting bracket 41, the mounting bracket 41 is assembled to the outer shell 1. With this pre-installation method, the water pump assembly 4 can be fixed first, and then the mounting bracket 41 is fixed to the outer shell 1, which can effectively ensure the consistency of the water pump assembly 4 during installation and avoid the water pump assembly 4 from generating large vibrations during operation. The mounting structures can be connected by threads, by snap-on connection, or by a combination of the two. Of course, other forms of connection are also possible, for example, ultrasonic welding and other processes are used for connection. A through hole is provided on the first bracket 42, and the nozzle 3 can be fluidically connected to the fluid distribution mechanism 17 of the water pump assembly 4 through the through hole.

[0025] refer to Figure 3 and 5 The accommodating cavity includes a first cavity 11 and a second cavity 12 . In order to improve the waterproof performance, a sealing structure 13 is provided on the first bracket 42 . The sealing structure 13 is used to achieve sealing between the first cavity 11 and the second cavity 12 .

[0026] refer to Figure 3-9 The outer shell 1 includes a first shell 31 and a second shell 32, and the first shell 31 and the second shell 32 cooperate to fix the mounting bracket 41 to the accommodating cavity. A mounting plate (not shown in the figure) can also be arranged between the first shell 31 and the second shell 32, and the mounting bracket 41 can be fixed to the second shell 32 through the mounting plate 33, and then the first shell 31 is fixed to the second shell 32. The connection method can be any of the connection methods mentioned above, which will not be described in detail here.

[0027] In order to facilitate adding cleaning liquid into the cleaning liquid tank 2, the outer shell 1 further defines a fluid channel 18, and the fluid channel 18 is connected to the cleaning liquid tank 2. The cleaning liquid can enter the cleaning liquid tank 2 through the fluid channel 18. Of course, the bottom of the cleaning liquid tank 2 can also be provided with a separate opening, so that the cleaning liquid can be injected or poured out from the container.

[0028] The spray head 3 is detachably mounted on the outer shell 1, and a locking mechanism 20 is provided between the outer shell 1 and the first bracket 42. The locking mechanism 20 is configured to enable the spray head 3 to be in an unlocked state or a locked state relative to the outer shell 1. Figure 8 and 9The locking mechanism 20 includes a mounting member 22 and a locking member 21. The mounting member 22 is mounted on the first bracket 42, and the locking member 21 is mounted on the mounting member 22. The locking member 21 can move relative to the mounting member 22 to achieve locking / unlocking. Specifically, the mounting member 22 is mounted at the through hole of the first bracket 42, and the locking member 21 is movably mounted on the mounting member 22. A spring 23 is provided on the locking mechanism 20, and the locking member 21 is locked by the elastic force of the spring 23. When the locking member 21 is subjected to force, the locking member 21 overcomes the elastic force and moves to the unlocking position, and the nozzle 3 can be removed from the outer shell 1.

[0029] The water flosser 100 further includes a battery pack 19 for providing power to the water pump assembly 4, and the battery pack 19 is mounted on the mounting bracket 41. The mounting bracket 41 fixes the water pump assembly 4 and also fixes the battery pack 19 on the mounting bracket 41. Specifically, the second bracket 43 defines a second mounting space 28, and the battery pack 19 can be fixedly mounted in the second mounting space 28.

[0030] The dental flosser 100 further includes a charging structure 25 for charging the battery pack 19, and the charging structure 25 is mounted on the first bracket 42. The charging structure 25 may include a plurality of charging pins, and the charging structure 25 may further include a magnetic structure, and the magnetic structure may cooperate with the magnetic structure on the charging line to achieve a magnetic connection.

[0031] A germicidal lamp 26 is also provided in the accommodating chamber, and the germicidal lamp 26 is located directly above the cleaning liquid tank 2. Figure 7 In the embodiment shown in the figure, the germicidal lamp 26 is installed at the bottom of the mounting bracket 41, and the light generated by the sterilizing device can directly irradiate the interior of the cleaning liquid tank 2 after passing through the light-transmitting material on the outer shell 1. The germicidal lamp 26 can be an ultraviolet lamp. Of course, the germicidal lamp 26 can also be a device of other forms that can achieve the sterilization function.

[0032] refer to Figure 10-20 , the structure of the nozzle is described in detail. The nozzle 402 is detachably mounted on the spray bar 401, and at least one of the spray bar 401 or the nozzle 402 is provided with a sealing structure 14, which is configured to prevent the fluid from flowing from the buffer chamber 7 to the spray bar 401 after the nozzle 402 is mounted on the spray bar 401. The sealing structure 14 can be an independent sealing member (for example: Fig.10 The sealing structure 14 may be a rubber ring or the like, which may be installed between the nozzle 402 and the spray bar 401. The sealing structure 14 may also be a rubber-coated part that is rubber-coated to the nozzle 402 or the spray bar 401. The rubber-coated part is interference-fitted with the nozzle 402 and the spray bar 401 to play a sealing role.

[0033] refer to Figure 10-20, the nozzle 402 includes a housing 5, the housing 5 defines a mounting cavity 6 and a buffer cavity 7 in fluid communication with the mounting cavity 6. In some embodiments, the cross-sectional area of ​​the buffer cavity 7 is smaller than the cross-sectional area of ​​the mounting cavity 6. The nozzle 402 also includes at least one water spray port 8 in fluid communication with the buffer cavity 7. A first threaded structure is provided in the mounting cavity 6, and the first threaded structure cooperates with a second threaded structure located on the spray rod 401 to achieve installation / removal of the nozzle 402. When the water spray port 8 of the nozzle 402 faces the user. The nozzle 402 rotates counterclockwise relative to the spray rod 401 to install the nozzle 402 on the spray rod 401, and the nozzle 402 rotates clockwise relative to the spray rod 401 to remove the nozzle 402 from the spray rod 401. This installation method, which is opposite to the ordinary installation method (clockwise installation, counterclockwise removal), can effectively prevent the user from installing the nozzle too tightly during installation, which is inconvenient to remove. At the same time, during long-term use, it can prevent users from operating incorrectly, which may cause the connection between the nozzle 402 and the spray rod 401 to become loose, thereby reducing the cleaning effect.

[0034] refer to Figure 13-20 In order to prevent the liquid sprayed from a single water jet 8 from being too concentrated and generating a very high pressure (relatively high pressure will damage part of the oral tissue), the inner wall 9 of the water jet 8 is provided with at least one flow channel 10, and the flow channels 10 are evenly distributed on the inner wall 9 of the water jet 8, wherein each flow channel 10 includes a fluid inlet 101, a fluid outlet 102, and a fluid channel 103 connecting the fluid inlet 101 and the fluid outlet 102, and the fluid channel 103 extends in a spiral shape relative to the central axis o of the water jet 8. The number of flow channels can be one, two or more. Reference Fig.17 and 18 When the number of flow channels is one, the flow channels are arranged spirally along the central axis o of the water jet. Figure 13-16 , 19, 20, when the number of flow channels is two or more, the multiple flow channels 10 are parallel to each other. Of course, in other embodiments, the multiple flow channels 10 may not be arranged in parallel. The cross section of the fluid channel 103 (equivalent to the width of the fluid channel 103) may be the same all the time, or may change gradually, for example, gradually increase or gradually decrease.

[0035] At least one spiral flow channel 10 is provided on the inner wall 9 of the water spout 8. The fluid rotates at high speed through the spiral structure around the water spout 8. The centrifugal force formed sweeps away foreign matter in the oral cavity, and interacts with the impulse force generated by the center of the nozzle, producing an effect of 1+1>2. At the same time, the rotation of the fluid inside the nozzle reduces the direct impact on the nozzle and prolongs the service life of the nozzle. Furthermore, the fluid rotates at high speed through the spiral flow channel to form a conical spray, which is evenly distributed over a large area.

[0036] Furthermore, the fluid consumes some energy through the spiral structure, which can effectively reduce the water pressure of the water nozzle, reduce the impact on the oral cavity, protect the oral cavity, and be more friendly to sensitive users. At the same time, the existence of the spiral flow channel can also reduce the possibility of clogging of the water nozzle.

[0037] refer to Figure 13-16 At least three spiral flow channels 10 are arranged on the inner wall 9 of the water spray port 8. The addition of three spiral flow channels 10 can, on the one hand, increase the liquid outlet area of ​​the water spray port 8; on the other hand, the liquid flowing out of the fluid outlet 102 along the flow channel 10 is deflected outwardly relative to the central axis o of the water spray port 8 in an outward direction, which can effectively reduce the water spraying pressure of the water spray port 8. At the same time, the fluid spirally sprayed out through the flow channel 10 can also improve the cleaning ability of the teeth by changing its angle.

[0038] Specifically, when three or more flow channels are provided, the rotation angle between the fluid inlet 101 and the fluid outlet 102 of a single flow channel 10 is less than 360°. The rotation of a single flow channel 10 by less than 360 degrees can reduce the kinetic energy loss of the fluid in the flow channel 10 and avoid turbulence inside the water spray port 8. Furthermore, the rotation angle between the fluid inlet 101 and the fluid outlet 102 of a single flow channel 10 is greater than 90° and less than 180°. When increasing the liquid outlet area, the spray pressure is ensured as much as possible, and the spray direction is changed at the same time to improve the cleaning ability.

[0039] In any of the above embodiments, in order to avoid the liquid outlet area of ​​the fluid channel 103 being too large, the depth of the fluid channel 103 is smaller than the radius of the water jet 8. In this way, it is possible to avoid reducing the water pressure of the water jet 8 due to the large liquid outlet area of ​​the fluid channel 103. Further, in order to ensure the water outlet pressure of the water jet 8, the depth of the fluid channel 103 is less than half of the radius of the water jet 8. The flow area of ​​the fluid channel 103 does not need to be too large, and its depth and width need to be set at a relatively reasonable level. The width of the fluid channel 103 is generally less than one-sixth of the inner diameter of the water jet 8.

[0040] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A nozzle detachably mounted on a spray bar of a water flosser, characterized in that: The nozzle comprises a housing, the housing defining a mounting cavity and a buffer cavity in fluid communication with the mounting cavity; the nozzle further comprises at least one water spray port in fluid communication with the buffer cavity; Among them, the inner wall of the water spray outlet is provided with at least one flow channel, and the flow channel includes a fluid inlet, a fluid outlet, and a fluid channel connecting the fluid inlet and the fluid outlet, and the fluid channel extends in a spiral shape relative to the central axis of the water spray outlet.

2. The nozzle according to claim 1, characterized in that When there are multiple flow channels, the multiple flow channels are evenly distributed on the inner wall of the water spray port.

3. The nozzle according to claim 2, characterized in that The rotation angle between the fluid inlet and the fluid outlet of a single flow channel is greater than 90° and less than 180°.

4. The nozzle according to claim 1, characterized in that The depth of the fluid channel is less than half of the radius of the water jet.

5. A dental flosser, characterized in that: The spray rod of the water flosser is equipped with a nozzle as described in any one of claims 1 to 4.

6. The oral rinser according to claim 5, characterized in that: A first threaded structure is provided in the installation cavity, and the first threaded structure cooperates with a second threaded structure located on the spray rod to realize the installation / removal of the nozzle; wherein, when the water spray port of the nozzle faces the user: the nozzle rotates counterclockwise relative to the spray rod to install the nozzle to the spray rod, and the nozzle rotates clockwise relative to the spray rod to remove the nozzle from the spray rod.

7. The oral rinser according to claim 5, characterized in that: The tooth irrigator defines an outer shell having a receiving cavity, a cleaning liquid tank for receiving a cleaning liquid, and a nozzle, and is characterized in that it also includes a water pump assembly, wherein the water pump assembly is used to pump the cleaning liquid in the cleaning liquid tank to the periphery of the teeth through the nozzle; The oral irrigator further comprises a mounting bracket, which is mounted in the accommodating cavity; the mounting bracket comprises a first bracket and a second bracket, and the first bracket and the second bracket cooperate to fix the water pump assembly to the mounting bracket; Wherein, the mounting bracket is configured to be assembled to the outer shell after the water pump assembly is fixed to the mounting bracket.

8. The oral rinser according to claim 7, characterized in that: The water pump assembly comprises a support frame, the support frame is provided with a driver, a transmission mechanism and a fluid distribution mechanism, and the driver drives the transmission structure to pump the fluid in the cleaning liquid tank to the nozzle.

9. The oral rinser according to claim 7, characterized in that: The nozzle is detachably mounted on the outer shell, a locking mechanism is provided between the outer shell and the first bracket, and the locking mechanism is configured to enable the nozzle to be in an unlocked state or a locked state relative to the outer shell.

10. The oral rinser according to claim 9, characterized in that: The locking mechanism comprises a mounting member and a locking member, wherein the mounting member is mounted on the first bracket, and the locking member is mounted on the mounting member, and the locking member can move relative to the mounting member to achieve locking / unlocking.

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