Invasion-resistant portable speaker

Abstract

Various implementations include portable loudspeakers. Some implementations include portable loudspeakers that mitigate ingress of moisture, particulates, and other contaminants. In certain implementations, the portable loudspeaker includes a housing with an enclosure having a co-molded structure for ingress resistance.

Description

Technical Field

[0001] Claims of Priority This application claims the priority of U.S. Patent Application No. 17 / 481,820, filed on September 22, 2021, the entire content of which is incorporated herein by reference.

[0002] This disclosure generally relates to audio devices. More particularly, this disclosure relates to a portable speaker that is resistant to the ingress of solid particles and liquids.

Background Art

[0003] There is an increasing need for audio devices, such as portable audio devices, to have increased capabilities and durability. However, it can be difficult to accommodate high-performance acoustic components within a rugged and compact portable audio device. Further, it is difficult to design environmental protection for many portable devices without sacrificing one or more performance capabilities.

Summary of the Invention

[0004] All examples and features mentioned below can be combined in any technically possible way.

Means for Solving the Problems

[0005] Various implementations include a portable loudspeaker. Some implementations include a portable loudspeaker that is resistant to the ingress of moisture, particulates, and other contaminants. In certain implementations, the portable loudspeaker includes a housing with an enclosure having a co-molded structure for intrusion resistance.

[0006] In certain embodiments, the portable loudspeaker includes a housing having a front grill and a rear enclosure coupled to the front grill, the rear enclosure including a co-molded structure having a rigid core and a compliant cover covering the rigid core, the rear enclosure defining a rear grill facing the front grill, and an electroacoustic transducer housed within the housing to provide acoustic output.

[0007] Implementations may include one or any combination of the following features.

[0008] In one example, the rigid core has a first hardness and the compliant cover has a second hardness that is less than the first hardness.

[0009] Optionally, the rear enclosure further includes a set of legs for stabilizing the portable loudspeaker on a surface.

[0010] In certain embodiments, the rear enclosure is contoured to define a contact area where the profile rests on the surface when placed upright on the surface, and the contact area and the set of legs provide at least four contact points with the surface to stabilize the portable loudspeaker while providing acoustic output.

[0011] In certain implementations, the set of legs includes at least four legs arranged in a trapezoidal shape.

[0012] In certain embodiments, the electroacoustic transducer is disposed eccentrically with respect to a lateral centerline of the housing, and the set of legs reduces rocking of the portable loudspeaker while the electroacoustic transducer provides an audio output.

[0013] Optionally, the rigid core includes plastic or polycarbonate resin and the compliant cover includes silicone.

[0014] In some implementations, at least one of the rigid core or the compliant cover is formed from a plurality of sub-layers of material.

[0015] In certain aspects, the rear grill is defined by a rigid core.

[0016] In some cases, the rear grill is a portion of the rigid core that is not covered by the compliant cover.

[0017] In some implementations, the loudspeaker further includes a baffle disposed between the rear enclosure and the front grill.

[0018] In certain aspects, the baffle includes an opening for an electroacoustic transducer, and the electroacoustic transducer is attached to the baffle. In certain cases, a gasket is disposed to seal the transducer to the baffle.

[0019] In certain cases, the loudspeaker further includes at least one passive radiator disposed between the baffle and the rear enclosure, the baffle includes an opening aligned with a first side of the passive radiator, and the rear grill is aligned with a second side of the passive radiator.

[0020] In certain cases, the at least one passive radiator includes a set of two passive radiators centered with respect to each other.

[0021] In some implementations, at least one of the passive radiators is attached to the baffle in proximity to the opening.

[0022] In certain aspects, the rear enclosure includes a housing for the passive radiator. In some cases, the passive radiator has an integrated seal.

[0023] In some cases, the loudspeaker further includes a battery and an outer member that directly covers the battery, and the outer member enhances the fire protection rating of the portable loudspeaker.

[0024] In some embodiments, the co-molded structure of the rear enclosure provides the portable loudspeaker with an ingress protection (IP) rating of at least IP67.

[0025] In certain cases, the maximum displacement of the electro-acoustic transducer occupies at least about 90 percent of the depth of the housing.

[0026] In one implementation, the maximum displacement of the electro-acoustic transducer occupies at least about 95 percent of the depth of the housing.

[0027] In some embodiments, the loudspeaker further includes a USB-C connector accessible through the housing, and the co-molded structure of the housing environmentally seals the USB-C connector.

[0028] In certain cases, the loudspeaker further includes a single printed circuit board (PCB) within the rear enclosure, and the single PCB controls the operation of the electro-acoustic transducer and the interface buttons disposed on the housing.

[0029] In some embodiments, the single PCB includes an opening for housing the electro-acoustic transducer.

[0030] In some implementations, the PCB has a longitudinal dimension that spans at least about 75 percent of the longest dimension of the housing.

[0031] In certain cases, the rear enclosure defines the rear of the portable loudspeaker and substantially the entire sidewall of the portable loudspeaker.

[0032] In some embodiments, the loudspeaker further includes a mounting strap extending through the rear enclosure, and the compliant cover provides an environmental seal around the mounting strap.

[0033] In certain implementations, the rear enclosure includes an internal well potted with a cap and adhesive to help environmentally seal the mounting strap.

[0034] Two or more features described in this disclosure, including the features described in this summary section, may be combined to form implementations not specifically described herein.

[0035] Details of one or more implementations are described in the accompanying drawings and the description below. Other features, objects, and advantages will be apparent from the description and drawings, and from the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0036]

Figure 1

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Figure 8

[0037] Note that the drawings of the various implementations are not necessarily to scale. The drawings are intended to show only typical aspects of the present disclosure and should not, therefore, be regarded as limiting the scope of the implementations. In the drawings, like numerals represent like elements between the drawings.

Mode for Carrying Out the Invention

[0038] The present disclosure provides, at least in part, a portable loudspeaker that advantageously incorporates a rear enclosure having a co-molded structure to improve manufacturability, improve durability (or robustness), and improve resistance to intrusion. The present disclosure is also based, at least in part, on the recognition that the co-molded structure can include a rigid core and a compliant cover that covers the rigid core, providing a durable and effective seal that covers internal components within the portable loudspeaker. The rigid core has a first hardness, the compliant cover has a second hardness, and the first hardness is greater than the second hardness. In some cases, the portable loudspeaker is compact in addition to being durable and intrusion resistant. For example, the electroacoustic transducer within the portable loudspeaker can have a maximum displacement that occupies at least about 90 percent of the depth of the speaker housing. The portable loudspeaker can also operate both the electroacoustic transducer and the interface button using a single printed circuit board (PCB).

[0039] Commonly labeled components in the figures are considered to be substantially equivalent components for illustrative purposes, and duplicate descriptions of those components are omitted for clarity.

[0040] As users demand more and more features from their portable electronic devices, it becomes more difficult to design and manufacture such devices to meet acoustic output specifications while maintaining portability, durability, battery life, and protection from elements (e.g., ingress protection). Further, as described herein, it is difficult to design environmental and shock protection for many portable devices without sacrificing one or more performance capabilities. In contrast to conventional audio devices, various implementations include a portable loudspeaker having a housing that includes a co-molded rear enclosure having a rigid core and a compliant cover. The rear enclosure houses most of the internal electronics, and the co-molded structure provides both durability and ingress protection. Additionally, in contrast to conventional audio devices, various implementations include a portable loudspeaker with an electroacoustic transducer having a maximum displacement that occupies about 90 percent or more of the depth of the housing, enabling high-quality audio output in a compact form factor.

[0041] FIG. 1 shows a front view of an audio device 10 in an upright position (also referred to as a forward emission position) according to various implementation forms. FIG. 2 shows a side view of the audio device 10 in the upright position. FIG. 3 shows a top view of the audio device 10 in the upright position, and FIG. 4 shows a side view of the audio device 10 in a reclined position (also referred to as an upward emission position). FIG. 5 shows a rear view of the audio device 10 in the forward emission position. FIG. 6 is a perspective view of the audio device 10 in the upward emission (e.g., reclined) position. FIG. 7 is an exploded view of the audio device 10 of FIGS. 1 to 6, showing various internal features of the device. FIGS. 1 to 7 are collectively referred to unless otherwise specifically mentioned, and FIG. 7 is most frequently referred to throughout the following description. In some cases, the audio device 10 includes a portable loudspeaker such as a desktop, mounted (or suspended), or handheld speaker. As described herein and shown in separate figures of the audio device 10, the portable loudspeaker can be configured to operate (i.e., output audio) in separate orientations and / or physical configurations, for example, placed horizontally, placed behind, placed on one or more legs, held by attachment straps or otherwise, etc.

[0042] Referring to the figures, and particularly to FIG. 7, the audio device 10 includes a housing 20 having a front grill 30 and a rear enclosure 40 coupled to the front grill 30. In various implementations, the rear enclosure 40 has a co-molded structure, as shown in the front view of the rear enclosure 40 of FIG. 8 (with the grill 30 removed). That is, the rear enclosure 40 has a rigid (or semi-rigid) core 50 and a compliant cover 60 that covers the rigid (or semi-rigid) core 50. In various implementations, the terms "rigid" and "compliant" are intended to convey a relative distinction in hardness such that the core 50 has a first hardness and the cover 60 has a second hardness that is lower than the first hardness. In some cases, the first hardness does not require absolute rigidity, but rather a significant difference from the second hardness. For example, the compliant cover 60 can have a Shore A hardness of about 50 or less, and the core 50 is significantly harder than the compliant cover 60. In certain cases, the core 50 is at least 15 percent, at least 20 percent, at least 25 percent, at least 30 percent, at least 35 percent, at least 40 percent, at least 45 percent, or at least 50 percent harder than the cover 60 (e.g., on a Shore scale or any other conventional hardness scale). In specific cases, the core 50 is at least 60 percent, 70 percent, or 80 percent harder than the cover 60. As described herein, the cover 60 is configured to fit over the core 50 in a compliant manner, such as by sealing against all contact surfaces of the core 50. Additionally, the cover 60 can provide impact protection for components within the housing 20, such as one or more transducers, microphones, passive radiators, control circuits (e.g., printed circuit boards, or PCBs), etc.

[0043] In certain examples, the core 50 comprises plastic or polycarbonate resin. In certain examples, the cover 60 comprises silicone. In certain examples where the cover 60 comprises silicone, the silicone can comprise liquid silicone rubber (LSR). In certain implementations, the core 50 and / or the cover 60 are formed from a plurality of sub-layers of material. For example, the cover 60 is formed from two or more sub-layers of material in certain implementations, and for example, a finish can be applied to the primary layer of silicone of the cover 60 after a molding process. The finish can assist with laser etching and / or can improve the appearance of the cover 60.

[0044] As described herein, the co-molded structure of the rear enclosure 40 can provide the audio device 10 with an ingress protection (IP) rating of at least IP67 (defined by the international protection marking standard indicated by the International Electrotechnical Commission (IEC)). In some cases, this co-molded structure of the rear enclosure 40 can provide an IP rating of at least IP68.

[0045] Continuing to refer to FIGS. 7 and 8, an electroacoustic transducer (or “transducer”) 70 is housed within the housing 20 to provide an acoustic output. As described herein, the transducer 70 can be positioned to improve the acoustic output within the housing 20 that is portable and can be easily repositioned by a user.

[0046] In some implementations, as shown in FIG. 7 and also apparent in FIGS. 2 and 6, the rear enclosure 40 defines the rear portion 80 of the audio device 10 (or portable loudspeaker) and substantially the entire sidewall 90 of the audio device 10. That is, the rear enclosure 40 surrounds the perimeter of some of the electronic devices within the housing 20 such that in an upward-firing orientation (e.g., FIG. 6), most of the electronic devices within the housing 20 are at least partially surrounded by the rear portion 80 and the sidewall 90 of the rear enclosure 40.

[0047] In various implementations, the rear enclosure 40 defines a rear grill 100 (FIGS. 4, 7) that faces the front grill 30. That is, in various implementations, the rear grill 100 is defined by the core 50, and thus the rear grill 100 is a part of the core 50 that is not covered by the compliant cover 60. In these cases, the rear grill 100 includes a set of openings that allow audio output to pass therethrough and is surrounded by the core 50 wrapped by the compliant cover 60.

[0048] In some cases, the rear enclosure 40 includes a set of legs 110 along one of the side walls 90a to stabilize the audio device 10 on a surface (e.g., FIGS. 1, 2, and 6), such as a tabletop, step, floor, truck bed, etc. The term side wall is used to describe the side wall 90a, but it is understood that this side of the audio device 10 can also be considered its bottom or base in the forward-firing orientation shown in FIGS. 1 and 2. In a particular implementation, the legs 110 include at least two legs 110a arranged along the length of the rear enclosure 40. Referring to FIGS. 2, 4, and 7, in some cases, for example, the outer surface 120 of the rear enclosure 40 along the side wall 90a is contoured to define a contact area 130 where the contour rests on the surface (e.g., tabletop, floor, etc.) when placed upright on the surface. In some of these cases, the contact area 130 and the set of legs 110 provide at least four contact points with the surface to stabilize the portable loudspeaker while providing acoustic output. In a particular aspect, the set of legs 110 includes two separate sets of two legs 110a, 110b (FIGS. 2, 4, 6), for a total of four legs along the side wall 90a. In one example, as shown in FIG. 4, the legs 110a, 110b are arranged in a trapezoidal shape along the side wall 90a.

[0049] Referring to FIGS. 7 and 8, in various implementations, the audio device 10 includes a transducer 70 disposed eccentrically with respect to the lateral center line (LCL) of the housing 20. That is, the transducer 70 is not aligned with the LCL and has an emission axis (Af) that is laterally offset with respect to the LCL. In some cases, a set of legs 110 reduces the rocking of the audio device 10 while the transducer 70 provides an audio output. The legs 110 along the side wall 90a may be particularly well-suited to reducing rocking while the audio device 10 is in a forward emission orientation (e.g., FIGS. 1, 2, and 8). In these cases, the legs 110 can provide a sufficient (e.g., frictional) force against the force from the movement of the transducer 70 with respect to a stationary surface.

[0050] FIGS. 7 and 8 further illustrate additional features of the audio device 10 according to various implementations. In these configurations, the audio device 10 further includes a baffle 140 disposed between the rear enclosure 40 and the front grill 30. In certain cases, the baffle 140 includes an opening 150 for the transducer 70. According to some implementations, the transducer 70 is attached to the baffle 140 using a set of fasteners 160 (four are shown for illustration). In some cases, the fasteners 160 can include threaded fasteners such as screws, bolts, clips, pins, or any other suitable fastening mechanism for holding the transducer 70 within the baffle 140 during use of the audio device 10. In certain cases, the fasteners extend through the baffle 140 and couple to corresponding openings or slots within the rear enclosure 40. A gasket 170 is disposed on the transducer 70 to seal the transducer 70 to the baffle 140 in certain cases.

[0051] In some cases, for example, as seen in FIGS. 2, 5, and 6, the transducer 70 is configured to extend over a majority of the depth (D) of the housing 20 (FIG. 2) during use, for example, to provide an audio output within a desired range. In some exemplary cases, the maximum displacement (e.g., the front and rear limits during use) of the transducer 70 occupies about 90 percent or more of the depth (D) of the housing 20. In a more specific example, the maximum displacement of the transducer 70 occupies about 95 percent or more of the depth (D) of the housing 20.

[0052] Continuing to refer to FIGS. 6 and 7, the audio device 10 can further include at least one passive radiator 180 disposed between the baffle 140 and the rear enclosure 40. In some of these cases, a set of two passive radiators 180a, 180b is provided and centered relative to each other. In a particular aspect, the baffle 140 includes an opening 190 aligned with a first side 200 of the passive radiator 180a. In a particular aspect, the rear grill 100 is aligned with a second side 210 of the passive radiator 180b such that a portion of the acoustic output from the passive radiators 180a, 180b is directed outwardly through the rear grill 100. According to some implementations, the passive radiator 180a is attached to the baffle 140 in proximity to the opening 190. In a particular aspect, the rear enclosure 40 includes a housing 220 for the passive radiators 180a, 180b such that the radiators 180 are incorporated into the rear enclosure 40. In these cases, the housing 220 can include a set of one or more walls, protrusions, or tabs for seating the passive radiators 180a, 180b. According to a particular implementation, the housing 220 is annular and surrounds at least a portion of the passive radiators 180a, 180b. In some cases, at least one of the passive radiators 180a, 180b has an integral seal for sealing within the housing 220. Further, a set of fasteners 230 can be disposed inside the passive radiator 180b to seal the passive radiator 180b to the rear enclosure 40.

[0053] Returning to FIG. 6, in some cases, the audio device 10 further includes a battery 240 and an exterior member 250 that directly covers the battery 240. In various implementations, the exterior member 250 helps control the risk of fire due to malfunction of the battery 240 and increases the fire rating of the audio device 10.

[0054] FIGS. 5 and 6 show additional aspects of the audio device 10, including, for example, a USB-C connector 260 that is accessible through the housing 20 (e.g., via a side wall 90 defined by the rear enclosure 40). In various implementations, the co-molded structure of the rear enclosure 40 environmentally seals the USB-C connector 260, reduces the ingress of environmental contaminants, and enhances the durability of the connector 260 and its associated functionality.

[0055] Referring to FIG. 6, in various implementations, the audio device 10 also includes a single printed circuit board (PCB) 270 within the rear enclosure 40. In these cases, the single PCB 270 is configured to control the operation of both the transducer 70 and the interface button 280 (FIGS. 3, 6) disposed on the housing 20. That is, the single PCB 270 provides a compact and energy-efficient mechanism for controlling the audio output in the audio device 10 along with the interface function. In certain implementations, the PCB 270 includes one or more digital signal processors (DSPs) and associated control circuitry for the transducer 70. In certain cases, the PCB 270 includes an opening 290 for housing the transducer 70. In certain aspects, the PCB 270 extends longitudinally across the audio device 10 (e.g., within the rear enclosure 40). For example, the PCB 270 can have a longitudinal dimension (ld) that spans at least about 75 percent of the longest dimension (LD) of the housing 20. In a further example, the PCB 270 can span at least 85 percent, 90 percent, or 95 percent of the LD of the housing 20. In additional implementations, the height (h) of the PCB 270 can span up to 65 percent, 75 percent, or 85 percent of the vertical height (H) of the housing 20 in the upright position (FIG. 2).

[0056] FIGS. 1 - 7 illustrate additional features of the audio device 10 according to an implementation, and the audio device 10 can include a mounting strap 300 that extends through the rear enclosure 40. As shown in FIG. 6, the compliant nature of the cover 60 can provide an environmental seal around the mounting strap 300, for example, to limit the ingress of environmental contaminants. In some cases, the rear enclosure 40 includes a pocket 310 that can include a cap and an adhesive to further seal the mounting strap 300 from the remainder of the electronics within the audio device 10 (FIG. 6).

[0057] As described herein, the audio device 10 disclosed in accordance with various implementations provides many advantages over conventional audio devices. For example, compared to conventional audio devices, the co-molded structure of the rear enclosure 40 is more consistently manufacturable. Additionally, the co-molded structure of the rear enclosure 40 and the integral nature of the rear and side walls improve durability (or ruggedness) and enhance resistance to ingress (e.g., moisture, particulates, etc.). In various implementations, as described herein, the audio device 10 is compact in addition to being durable and ingress-resistant. For example, the audio device 10 is configured such that the transducer 70 has a maximum displacement that occupies a majority of the depth of the housing 20, e.g., in some cases, about 90 percent or more of the depth of the speaker housing. At least a portion of the compact nature of the audio device 10 is enabled by a single PCB that can operate both the electroacoustic transducer and the interface buttons.

[0058] As shown in the figures included herein, it is understood that the relative proportions, sizes, and shapes of the audio device 10 and its components and features can be merely illustrative of such physical attributes of these components. That is, these proportions, shapes, and sizes can be varied by various implementations to suit different products. For example, although a loudspeaker substantially in the shape of a block (or rectangular cross-section) may be shown for a particular implementation, it is understood that the loudspeaker can also take other three-dimensional shapes to provide the acoustic functions described herein.

[0059] In various implementations, components that are described as being "coupled" to each other can be joined along one or more interfaces. In some implementations, these interfaces can include junctions between separate components, while in other cases, these interfaces can include firmly and / or integrally formed interconnects. That is, in some cases, components that are "coupled" to each other can be formed simultaneously to define a single continuous member. However, in other implementations, these coupled components can be formed as separate members and then joined by known processes (e.g., soldering, fastening, ultrasonic welding, bonding). In various implementations, electronic components described as "coupled" can be linked via conventional wired and / or wireless means such that these electronic components can communicate data with each other. Further, sub-components within a given component can be considered to be linked via conventional paths, although not necessarily shown.

[0060] Multiple implementations have been described. Nevertheless, additional modifications can be made without departing from the scope of the concepts of the invention described herein, and accordingly, other implementations are understood to be within the scope of the following claims.

Claims

**Claim 1** A portable loudspeaker, comprising a housing, a front grill, a rear enclosure coupled to the front grill, the rear enclosure having a co - molded structure including a rigid core and a compliant cover covering the rigid core, the rear enclosure defining a rear grill facing the front grill, an electro - acoustic transducer housed within the housing for providing acoustic output, and a portable loudspeaker comprising the above. **Claim 2** The portable loudspeaker according to claim 1, wherein the rear enclosure further comprises a set of legs for stabilizing the portable loudspeaker on a surface. **Claim 3** The rear enclosure is contoured to define a contact area where the contour rests on the surface when placed upright on the surface, and the contact area and the set of legs provide at least four contact points with the surface for stabilizing the portable loudspeaker while providing the acoustic output. The portable loudspeaker according to claim 2. **Claim 4** The portable loudspeaker according to claim 2, wherein the set of legs includes at least four legs arranged in a trapezoidal shape. **Claim 5** The electro - acoustic transducer is eccentrically arranged with respect to the lateral center line of the housing, and the set of legs reduces the rocking of the portable loudspeaker while the electro - acoustic transducer provides the acoustic output. The portable loudspeaker according to claim 2. **Claim 6** The portable loudspeaker according to claim 1, wherein the rigid core includes plastic or polycarbonate resin, and the compliant cover includes silicone. **Claim 7** The portable loudspeaker according to claim 1, wherein at least one of the rigid core or the compliant cover is formed from a plurality of sub - layers of material. **Claim 8** The portable loudspeaker according to claim 1, wherein the rear grill is defined by the rigid core. **Claim 9** The portable loudspeaker according to claim 8, wherein the rear grill is a part of the rigid core not covered by the compliant cover. **Claim 10** The portable loudspeaker according to claim 1, further comprising a baffle disposed between the rear enclosure and the front grill. **Claim 11** The baffle includes an opening for the electroacoustic transducer, and the electroacoustic transducer is attached to the baffle. The portable loudspeaker according to claim 10.

12. The portable loudspeaker according to claim 10, further comprising a set of passive radiators disposed between the baffle and the rear enclosure, wherein the baffle includes an opening aligned with a first side of one of the passive radiators, and the rear grill is aligned with a second side of another one of the passive radiators.

13. The portable loudspeaker according to claim 12, wherein the passive radiator is attached to the baffle in proximity to the opening.

14. The portable loudspeaker according to claim 12, wherein the rear enclosure includes a housing for the passive radiator.

15. The portable loudspeaker according to claim 1, further comprising a battery and an exterior member that directly covers the battery, wherein the exterior member enhances the fire rating of the portable loudspeaker.

16. The portable loudspeaker according to claim 1, wherein the co-molded structure of the rear enclosure provides the portable loudspeaker with an ingress protection (IP) rating of at least IP67.

17. The portable loudspeaker according to claim 1, wherein the maximum displacement of the electroacoustic transducer occupies at least about 90 percent of the depth of the housing.

18. The portable loudspeaker according to claim 17, wherein the maximum displacement of the electroacoustic transducer occupies at least about 95 percent of the depth of the housing.

19. The portable loudspeaker according to claim 1, further comprising a USB-C connector accessible through the housing, and wherein the co-molded structure of the housing environmentally seals the USB-C connector.

20. The portable loudspeaker according to claim 1, further comprising a single printed circuit board (PCB) within the rear enclosure, wherein the single PCB controls the operation of the electroacoustic transducer and the interface buttons disposed on the housing.

21. The portable loudspeaker according to claim 20, wherein the single PCB includes an opening for housing the electroacoustic transducer.

22. The portable loudspeaker according to claim 20, wherein the PCB has a longitudinal dimension that extends over at least about 75 percent of the longest dimension of the housing. **Claim 23** The portable loudspeaker according to claim 1, wherein the rear enclosure defines a rear portion of the portable loudspeaker and substantially the entire sidewall of the portable loudspeaker. **Claim 24** The portable loudspeaker according to claim 1, further comprising a mounting strap extending through the rear enclosure, wherein the compliant cover provides an environmental seal around the mounting strap.

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