Shell connecting structure of panel lamp and panel lamp

Abstract

The invention discloses a panel lamp shell connecting structure and a panel lamp, and relates to the technical field of lamps, the panel lamp shell connecting structure comprises a connecting base body, a mounting groove is formed in one side of the connecting base body, pressing plates are arranged in the mounting groove at intervals, first connecting holes are formed in the pressing plates, second connecting holes are formed in the connecting base body, and the first connecting holes and the second connecting holes are arranged in a one-to-one correspondence mode; adjusting pieces are arranged between the adjacent pressing plates and comprise first annular plates and second annular plates, the first annular plates and the second annular plates abut against the adjacent pressing plates respectively, and elastic plates are arranged between the first annular plates and the second annular plates. According to the shell connecting structure of the panel lamp and the panel lamp, heat dissipation and buffering are balanced, and the fastening effect is good.

Description

Technical Field

[0001] The invention belongs to the technical field of lamps, and in particular relates to a housing connection structure of a panel lamp and a panel lamp. Background Art

[0002] LED panel light is a high-end indoor lighting fixture. Its outer frame is made of anodized aluminum alloy. The light source is LED. The whole lamp is beautifully designed, simple, and luxurious. It not only has good lighting effects, but also brings people a sense of beauty. The LED panel light is uniquely designed. After the light passes through the high-transmittance light guide plate, it forms a uniform planar luminous effect. The illumination is uniform, the light is soft, comfortable and bright, and can effectively relieve eye fatigue.

[0003] The prior art includes an invention patent entitled Panel Lamp Installation Structure, Panel Lamp and Installation Method thereof, and the publication number of this invention patent is US20210341114A1. This invention discloses a panel lamp installation structure, a panel lamp and an installation method thereof, wherein the panel lamp installation structure includes a fixing groove arranged on the back of the lamp body, and a mounting bracket matched and snapped with the fixing groove; the first snap-in plate in the mounting bracket slides into the first fixing groove through the first accommodating surface, and is matched and snapped with the first fixing groove through the first abutting surface and the second abutting surface; the second snap-in plate in the mounting bracket slides into the second fixing groove through the second accommodating surface and the third accommodating surface, and is matched and snapped with the second fixing groove through the third abutting surface and the fourth abutting surface. This invention adopts a sliding snap-in method to match and connect the panel lamp body with the mounting bracket, which is convenient and fast to install, and has an excellent ceiling effect. In addition, this invention can also realize blind operation during the installation process of the panel lamp. However, this invention has insufficient heat dissipation and shock absorption effects on the panel lamp. Summary of the invention

[0004] The object of the present invention is to provide a panel lamp housing connection structure and a panel lamp with balanced heat dissipation and buffering and good fastening effect.

[0005] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: The shell connection structure of the panel lamp includes a connection base, a mounting groove is provided on one side of the connection base, a pressure plate is arranged at intervals in the mounting groove, a first connection hole is provided on the pressure plate, a second connection hole is provided on the connection base, the first connection hole and the second connection hole are arranged in a one-to-one correspondence, an adjustment member is provided between adjacent pressure plates, the adjustment member includes a first ring plate and a second ring plate, the first ring plate and the second ring plate are respectively abutted against adjacent pressure plates, and an elastic plate is provided between the first ring plate and the second ring plate.

[0006] According to one embodiment of the present invention, the pressure plate is arranged at an angle, and the pressure plate has a back side facing the installation groove and a front side on the other side, the first ring plate is connected to the back side of the pressure plate on one side, the second ring plate is bent, and the second ring plate includes a first surface and a second surface, the first surface abuts against the front side of the pressure plate on the other side, and the second surface abuts against the installation groove.

[0007] The panel light is connected to the fixing surface by using the connection base. It should be noted that the fixing surface can be the surface of the fixing base such as a wall surface, or can be a frame such as a lamp stand that can be moved to adjust the angle and height of the panel light. The fixing surface, the shell connection structure and the panel light can be connected in sequence by fasteners, wherein the fasteners are connected in sequence through the first connection hole provided on the pressure plate and the second connection hole provided on the connection base when passing through the shell connection structure.

[0008] Since the pressure plate is set at an angle, and an adjusting piece is provided between two adjacent pressure plates, the cooperation between the pressure plate and the fastener actually has a tensioning effect on the fastener to prevent the fastener from loosening. It should be noted that when the fastener penetrates the connecting structure to connect the fixed surface and the panel light, the pressure plate will be compressed. At this time, the adjusting piece will be compressed, and the elastic plate provided between the first ring plate and the second ring plate of the adjusting piece will undergo elastic deformation, the spacing between the first annular plate and the first surface will decrease, the inclination angle of the pressure plate will increase, and the distance between the pressure plates will decrease. At this time, the adjusting piece will exert an upward force on the adjacent pressure plates, and the pressure plates will apply this force The tension force is transmitted to the fastener, thereby realizing the effect of the tension force on the fastener to prevent the fastener from loosening; in addition, through the setting of the adjusting piece, when the panel lamp or the fixed surface vibrates, the setting of the adjusting piece between the two pressure plates can prevent the vibration transmission, that is, prevent the vibration of the panel lamp from being transmitted to the fixed surface or the vibration of the vibrating surface from being transmitted to the panel lamp, which can improve the stability of the panel lamp, reduce the vibration amplitude of the panel lamp and accelerate the stabilization speed of the panel lamp, and when it is necessary to move the frame or adjust the angle, the adjusting piece can prevent the panel lamp from vibrating too much, which may cause an unstable connection between the fixed surface and the panel lamp.

[0009] By arranging the pressure plates and the adjusting parts in an array, the distance between the panel light and the fixed surface can be adjusted when the fasteners are adjusted. Since there are multiple fasteners, the accuracy and stability of the distance control between the panel light and the fixed surface can be achieved, and a spacing distance between the panel light and the fixed surface can be achieved to achieve a heat dissipation space between the panel light and the fixed surface. When the airflow flows through the connecting structure, the airflow will be disturbed by the shape of the adjusting part itself when flowing through the pressure plate and the adjusting part, thereby improving the contact effect between the airflow and the connecting substrate, and improving the heat dissipation effect of the panel light. In addition, the turbulence formed after the airflow is disturbed by the adjusting part and the pressure plate is conducive to cleaning the dust at the connection of the panel light, and preventing excessive dust accumulation from causing the panel light to accumulate too much heat and be unable to dissipate.

[0010] Furthermore, there are at least two limit plates between the first ring plate and the second ring plate. The limit plate is a flexible plate, which can be set on the first ring plate or the second ring plate. The limit plate is used to prevent the elastic plate between the first ring plate and the second ring plate from bending too much when the fastener applies too much force on the pressure plate, resulting in exceeding the yield limit of the elastic plate; in addition, the setting of the limit plate can further realize the disturbance of the airflow, improve the airflow near the connection structure, and improve the heat dissipation effect of the panel light.

[0011] Furthermore, the fasteners can be arranged at intervals. Specifically, the pressure plate and the fasteners are not arranged in a one-to-one correspondence, but the fasteners and the pressure plate can be arranged at intervals. The arrangement of the fasteners can realize the distribution of the fasteners as needed, that is, different fastener arrangements can be used for different fixing surfaces and different panel lights. It should be noted that the interval arrangement of the fasteners can also realize the role of the pressure plate and the adjustment member, which can improve the adaptability of the connection structure.

[0012] According to an embodiment of the present invention, convex strips are provided on both the first surface and the second surface.

[0013] The first ring plate is connected to the back side of the pressure plate on one side, the convex strips arranged on the first surface are used to abut against the front side of the pressure plate, and the convex strips arranged on the second surface are used to abut against the inner surface of the mounting groove. Specifically, the first ring plate and the back side of the pressure plate on one side are fixedly connected, and the convex strips are slidably connected to the pressure plate and the surface of the mounting groove. Such a setting can improve the connection strength between the adjusting member and the pressure plate, and can also improve the regulation between the first ring plate and the second ring plate; in addition, the setting of the convex strips can further improve the heat dissipation performance of the connection structure, that is, the convex strips located on the second surface can achieve heat dissipation through airflow.

[0014] The panel lamp comprises a first substrate, on which at least one connecting groove is arranged, and a shell connecting structure of the panel lamp, wherein the connecting substrate and the connecting groove are arranged in a one-to-one correspondence.

[0015] According to an embodiment of the present invention, the first substrate is provided with a protrusion opposite to the back side of the connection groove, a bent diffusion plate is provided between the two protrusions, a lamp board is provided on one side of the diffusion plate, and at least two lamp beads are provided on the lamp board; Both sides of the first base are provided with mounting side panels, and one side of the lamp panel is provided with a lampshade at intervals, and the lampshade is connected to the protrusion.

[0016] The present invention further designs the panel light. As described above, two opposite protrusions are provided on one side of the first substrate, and a bent diffusion plate is provided between the protrusions. A light board is provided on the diffusion plate. The light is irradiated by the lamp beads on the light board and the light emitted by the lamp beads is diffused under the refraction of the diffusion plate.

[0017] The lamp cover is used to protect the lamp panel and prevent biological entry and cause short circuit.

[0018] Furthermore, a second substrate is provided on the first substrate, which is detachably connected and perpendicular to the first substrate, and a connecting groove is also provided on the second substrate, and the mounting groove is used to cooperate with the connecting base. The second substrate is provided to expand the application range of the panel light. In addition, the second substrate is provided with a connecting groove, and the connecting groove can be provided in cooperation with the connecting base, which can also improve the stability of the second substrate during the fixing process.

[0019] According to an embodiment of the present invention, the lampshade includes a first lampshade and a second lampshade spaced apart from each other, and the second lampshade is provided with ventilation holes.

[0020] Through the above design, the temperature of the internal space of the first lampshade can be dissipated by arranging the ventilation holes on the second lampshade, and the light can be refracted through the two side covers by the first lampshade and the second lampshade, so that the light distribution can be more uniform and the diffusion range can be larger. Furthermore, the ventilation holes on the second lampshade are arranged around the side, and the ventilation holes can refract the light from the first lampshade to further expand the light irradiation effect around the lampshade, that is, reduce the problem of insufficient light in the connection position of the panel light and the fixed surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the panel light; Figure 2 This is a front view diagram of the panel light; Figure 3 It is a three-dimensional schematic diagram of the panel light structure; Figure 4 This is a three-dimensional schematic diagram of another panel light structure; Figure 5 It is a schematic diagram of the connection between the base, the pressure plate and the adjustment member; Figure 6 Another schematic diagram of the connection base, the pressure plate and the adjustment member; Figure 7 A cross-sectional schematic diagram of the connection base, the pressure plate and the adjustment member; Figure 8 It is a three-dimensional schematic diagram of the adjustment member; Fig. 9 is a schematic diagram of the lampshade structure; Fig.10 It is a schematic diagram of the matching parts structure.

[0022] Figure numbers: connecting base 1, mounting groove 11, pressing plate 12, first connecting hole 13, second connecting hole 14, adjusting member 2, first ring plate 21, second ring plate 22, elastic plate 23, first surface 24, second surface 25, convex strip 26, first base 3, connecting groove 31, first base plate 32, protrusion 33, diffusion plate 34, lamp plate 35, lamp bead 36, mounting side plate 37, lamp cover 4, first lamp cover 41, second lamp cover 42, vent hole 43, fastener 5, mating member 6, mating body 61, first matching ring 62, second matching ring 63, mating blind hole 64, mating hole 65. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described in detail below in conjunction with specific implementations and drawings: Embodiment 1: like Figure 1-Figure 9 As shown, the shell connection structure of the panel lamp includes a connection base 1, a mounting groove 11 is provided on one side of the connection base 1, and a pressure plate 12 is arranged at intervals in the mounting groove 11. A first connection hole 13 is provided on the pressure plate 12, and a second connection hole 14 is provided on the connection base 1. The first connection hole 13 and the second connection hole 14 are arranged in a one-to-one correspondence. An adjusting member 2 is provided between adjacent pressure plates 12, and the adjusting member 2 includes a first ring plate 21 and a second ring plate 22. The first ring plate 21 and the second ring plate 22 are respectively abutted against the adjacent pressure plates 12, and an elastic plate 23 is provided between the first ring plate 21 and the second ring plate 22.

[0024] The pressure plate 12 is tilted, and the pressure plate 12 has a back side facing the mounting groove 11 and a front side on the other side. The first ring plate 21 is connected to the back side of the pressure plate 12 on one side, and the second ring plate 22 is bent. The second ring plate 22 includes a first surface 24 and a second surface 25. The first surface 24 abuts against the front side of the pressure plate 12 on the other side, and the second surface 25 abuts against the mounting groove 11.

[0025] The panel light is connected to the fixing surface by using the connection base 1. It should be noted that the fixing surface can be the surface of the fixing base such as a wall surface, or can be a frame such as a lamp stand that can be moved to adjust the angle and height of the panel light. The fixing surface, the shell connection structure and the panel light can be connected in sequence by the fastener 5. When the fastener 5 passes through the shell connection structure, it is connected in sequence through the first connection hole 13 provided on the pressure plate 12 and the second connection hole 14 provided on the connection base 1.

[0026] Since the pressure plate 12 is arranged at an angle, and an adjusting member 2 is arranged between two adjacent pressure plates 12, the cooperation between the pressure plate 12 and the fastener 5 actually has a tensioning effect on the fastener 5 to prevent the fastener 5 from loosening. It should be noted that when the fastener 5 penetrates the connecting structure to connect the fixed surface and the panel light, the pressure plate 12 will be compressed at this time, and the adjusting member 2 will be compressed at this time. The elastic plate 23 provided between the first ring plate 21 and the second ring plate 22 of the adjusting member 2 will undergo elastic deformation, and the spacing between the first annular plate and the first surface 24 will decrease. The inclination angle of the pressure plate 12 will increase and the distance between the pressure plates 12 and 12 will decrease, and the adjusting member 2 will exert an elastic force on the adjacent pressure plates 12. The pressure plate 12 will transfer the force to the fastener 5, thereby realizing the effect of the tension force on the fastener 5 to prevent the fastener 5 from loosening; in addition, through the setting of the adjusting member 2, when the panel light or the fixed surface vibrates, the setting of the adjusting member 2 set between the two pressure plates 12 can prevent the vibration transmission, that is, prevent the vibration of the panel light from being transmitted to the fixed surface or the vibration of the vibrating surface from being transmitted to the panel light, which can improve the stability of the panel light, reduce the vibration amplitude of the panel light and accelerate the stabilization speed of the panel light, and when it is necessary to move the frame or adjust the angle, the adjusting member 2 can prevent the panel light from vibrating too much, which may cause an unstable connection between the fixed surface and the panel light.

[0027] By arranging the pressure plate 12 and the adjusting member 2 in an array, when adjusting the fastener 5, the distance between the panel light and the fixed surface can be adjusted. Since a plurality of fasteners 5 are provided, the accuracy and stability of the distance control between the panel light and the fixed surface can be achieved, and a spacing distance between the panel light and the fixed surface can be achieved to achieve a heat dissipation space between the panel light and the fixed surface. When the airflow flows through the connection structure, the airflow will be disturbed by the shape of the adjusting member 2 itself when flowing through the pressure plate 12 and the adjusting member 2, thereby improving the contact effect between the airflow and the connection base 1, and can improve the heat dissipation effect of the panel light. In addition, the turbulence formed after the airflow is disturbed by the adjusting member 2 and the pressure plate 12 is conducive to cleaning the dust at the connection of the panel light, and preventing excessive dust accumulation from causing the panel light to accumulate too much heat and be unable to dissipate.

[0028] Furthermore, there are at least two limit plates between the first ring plate 21 and the second ring plate 22. The limit plate is a flexible plate, which can be set on the first ring plate 21 or the second ring plate 22. The limit plate is used to prevent the elastic plate 23 between the first ring plate 21 and the second ring plate 22 from bending too much when the fastener 5 applies too much force on the pressure plate 12, resulting in exceeding the yield limit of the elastic plate 23; in addition, the setting of the limit plate can further realize the disturbance of the airflow, improve the airflow near the connection structure, and improve the heat dissipation effect of the panel light.

[0029] Furthermore, the fasteners 5 can be arranged at intervals. Specifically, the cooperation between the pressing plate 12 and the fasteners 5 is not arranged one-to-one, and the cooperation between the fasteners 5 and the pressing plate 12 can be arranged at intervals. Through the arrangement of the fasteners 5, the fasteners 5 can be distributed as needed, that is, different arrangements of the fasteners 5 can be used for different fixing surfaces and different panel lights. It should be noted that the interval arrangement of the fasteners 5 can also achieve the role of the pressing plate 12 and the adjusting member 2, which can improve the adaptability of the connection structure.

[0030] Both the first surface 24 and the second surface 25 are provided with convex strips 26 .

[0031] The first ring plate 21 is connected to the back side of the pressure plate 12 on one side, the convex strip 26 arranged on the first surface 24 is used to abut against the front side of the pressure plate 12, and the convex strip 26 arranged on the second surface 25 is used to abut against the inner surface of the mounting groove 11. Specifically, the first ring plate 21 and the back side of the pressure plate 12 on one side are fixedly connected, and the convex strip 26 is slidably connected to the pressure plate 12 and the surface of the mounting groove 11. Such a setting can improve the connection strength between the adjusting member 2 and the pressure plate 12, and can also improve the regulation between the first ring plate 21 and the second ring plate 22; in addition, the setting of the convex strip 26 can further improve the heat dissipation performance of the connection structure, that is, the convex strip 26 located on the second surface 25 can achieve heat dissipation through airflow.

[0032] The panel light comprises a first base body 3 on which at least one connecting groove 31 is arranged, and also comprises a housing connecting structure of the panel light, wherein the connecting base body 1 and the connecting groove 31 are arranged in a one-to-one correspondence.

[0033] The first substrate 32 is provided with a protrusion 33 opposite to the connecting groove 31 on the back side, a bent diffusion plate 34 is provided between the two protrusions 33, a lamp board 35 is provided on one side of the diffusion plate 34, and at least two lamp beads 36 are provided on the lamp board 35; Mounting side plates 37 are disposed on both sides of the first base body 3 , and a lampshade 4 is disposed at intervals on one side of the lamp plate 35 , and the lampshade 4 is connected to the protrusion 33 .

[0034] The present invention further designs the panel light. As mentioned above, two opposite protrusions 33 are provided on one side of the first substrate 32, and a bent diffusion plate 34 is provided between the protrusions 33. A light board 35 is provided on the diffusion plate 34. The light is irradiated by the lamp beads 36 on the light board 35, and the light emitted by the lamp beads 36 is diffused under the refraction of the diffusion plate 34, so that the light of the panel light is controlled within the set irradiation angle range; the side plate 37 and the protrusion 33 are installed to fix the lampshade 4 together, and the side plate 37, the protrusion 33 and the lampshade 4 work together to protect the light board 35, and prevent the occurrence of short circuit caused by biological entry. The diffusion plate 34 between the two protrusions 33 is arranged to fit with the protrusion 33, so the protrusion 33 can control the refraction angle of the light of the diffusion plate 34.

[0035] More specifically, the protrusion 33 is a hollow structure. The hollow structure of the protrusion 33 can increase the heat dissipation area of ​​the panel lamp and improve the heat dissipation effect of the panel lamp.

[0036] Furthermore, a second substrate is provided on the first substrate 32, which is detachably connected and perpendicular to the first substrate 32. The second substrate is also provided with a connecting groove 31, and the mounting groove 11 is used to cooperate with the connecting base 1. The second substrate is provided to expand the application range of the panel light. In addition, the second substrate is provided with a connecting groove 31 and the connecting groove 31 can be provided in cooperation with the connecting base 1, which can also improve the stability of the second substrate during the fixing process.

[0037] The lampshade 4 includes a first lampshade 41 and a second lampshade 42 spaced apart from each other. The second lampshade 42 is provided with ventilation holes 43 .

[0038] Through the above design, the temperature of the internal space of the first lampshade 41 can be dissipated by arranging the vent holes 43 on the second lampshade 42, and the light can be refracted by the refracted light from the two side covers by the first lampshade 41 and the second lampshade 42, so that the light distribution can be more uniform and the diffusion range can be larger. Furthermore, the vent holes 43 on the second lampshade 42 are arranged around the side, and the vent holes 43 can refract the light from the first lampshade 41, further expanding the light irradiation effect around the lampshade 4, that is, reducing the problem of insufficient light in the connection position of the panel light and the fixed surface.

[0039] Embodiment 2: like Fig.10As shown, a shell connection structure and a panel lamp according to another embodiment of the present invention are different from those in Example 1 in that a fastener 5 penetrates through the first substrate 3 and is connected to the diffuser 34, a mating piece 6 is provided at the end of the fastener 5, and the mating piece 6 is matched with the diffuser 34. The mating piece 6 includes a mating body 61, and a first matching ring 62 and a second matching ring 63 are respectively provided at both ends of the mating body. A mating blind hole 64 is provided on the mating body 61, and the mating blind hole 64 is matched with the fastener 5.

[0040] The diffuser plate 34 is provided with a matching hole 65 , and the matching hole 65 and the matching piece 6 are matched with each other.

[0041] By providing a matching piece 6, the matching piece 6 is matched with the matching hole 65 located on the diffuser plate 34, and is connected to the fastener 5 through the matching blind hole 64, so that the fastener 5 can be prevented from piercing the lamp board 35 during the installation and fixing process, and the provision of the matching piece 6 can improve the contact firmness between the fastener 5 and the diffuser plate 34 and ensure the mutual parallelism of the lamp board 35 and the first substrate 3 when the two are installed, because the first matching ring 62 and the second matching ring of the matching piece 6 can adjust the horizontal state of the lamp board 35 to ensure the horizontality of the lamp board 35 and avoid the light board 35 from loosening relative to the fastener 5.

[0042] Furthermore, the first substrate 32 has a cavity therein.

[0043] The cavity in the first substrate 32 can increase the weight of the first base body 3 itself. In addition, the cavity in the first substrate 32 can also improve the heat dissipation effect of the panel light.

[0044] The embodiments described above provide a detailed description of the technical solutions of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, supplements or similar substitutions made within the scope of the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A housing connection structure of a panel lamp, comprising a connection base (1), wherein one side of the connection base (1) has a mounting groove (11), wherein the mounting groove (11) has a pressure plate (12) arranged at intervals, wherein the pressure plate (12) is provided with a first connection hole (13), and the connection base (1) is provided with a second connection hole (14), wherein the first connection hole (13) and the second connection hole (14) are arranged in a one-to-one correspondence, and wherein: An adjusting member (2) is provided between adjacent pressing plates (12), the adjusting member (2) comprising a first ring plate (21) and a second ring plate (22), the first ring plate (21) and the second ring plate (22) being connected to adjacent pressing plates (12) respectively, and an elastic plate (23) being provided between the first ring plate (21) and the second ring plate (22).

2. The housing connection structure of the panel light according to claim 1, characterized in that: The pressing plate (12) is arranged at an angle, and the pressing plate (12) has a back side facing the mounting groove (11) and a front side on the other side, the first ring plate (21) is connected to the back side of the pressing plate (12) on one side, the second ring plate (22) is arranged in a bent manner, and the second ring plate (22) includes a first surface (24) and a second surface (25), the first surface (24) abuts against the front side of the pressing plate (12) on the other side, and the second surface (25) abuts against the mounting groove (11).

3. The housing connection structure of the panel light according to claim 2, characterized in that: The first surface (24) and the second surface (25) are both provided with convex strips (26).

4. A panel lamp, comprising a first substrate (3), wherein the first substrate (3) is provided with at least one connection groove (31), characterized in that: It also comprises the housing connection structure of the panel lamp according to any one of claims 1 to 3, wherein the connection base (1) and the connection groove (31) are arranged in a one-to-one correspondence.

5. The panel light according to claim 4, characterized in that: The first base body (3) comprises a first substrate (32), the first substrate (32) being provided with a protrusion (33) on the back side opposite to the connection groove (31), a bent diffusion plate (34) being provided between the two protrusions (33), a lamp plate (35) being provided on one side of the diffusion plate (34), and at least two lamp beads (36) being provided on the lamp plate (35); Mounting side panels (37) are provided on both sides of the first base body (3), and a lampshade (4) is provided at intervals on one side of the lamp panel (35), wherein the lampshade (4) is connected to the protrusion (33).

6. The panel light according to claim 5, characterized in that: The lampshade (4) comprises a first lampshade (41) and a second lampshade (42) which are arranged inside and outside with a spacing, and the second lampshade (42) is provided with ventilation holes (43).

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